NISHIYABU Kazuaki

Researcher Information

Degree

• Docter of Engineering（Osaka University）

J-Global ID

• 200901052192112662

Research Interests

• マイクロ構造体   ナノインプリント   粉末成形   粉末射出成形   ナノ粉末   犠牲樹脂型   転写性   マイクロMIM   銅   ニッケル   焼結   コンタクト印刷   ナノ粒子   ナノファイバ   金属粉末射出成形   MIM   ポーラス材料   マイクロ加工   繊維強化複合材料   Porous Metals   Metal Injection Molding   Composite Materials   

Research Areas

• Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Machine materials and mechanics
• Nanotechnology/Materials / Material fabrication and microstructure control
• Nanotechnology/Materials / Composite materials and interfaces
• Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Manufacturing and production engineering
• Nanotechnology/Materials / Nano/micro-systems
• Nanotechnology/Materials / Nanomaterials

Academic & Professional Experience

• 2016/04 - Today  Kindai UiniversityFaculty of Science and TechnologyProfessor
• 2010/04 - 2016/03  Kinki UniversityFaculty of Science and EngineeringAssociate Professor
• 2005/04 - 2010/03  Osaka Prefectural College of TechnologyIndustrial Systems EngineeringAssociate Professor
• 1998/04 - 2005/03  Osaka Prefectural College of Technology Industrial Systems EngineeringDepartment of Mechanical EngineeringAssociate Professor
• 1999/04 - 1999/09  Katholieke Universiteit LeuveDepartment of Metals and MaterialsGuest Professor
• 1991/04 - 1998/03  Osaka Prefectural College of TechnologyDepartment of Mechanical EngineeringLecturer
• 1992/04 - 1993/03  Osaka Prefectural Industrial Technical Research InstituteDivision of Material TechnologyReseacher
• 1988/04 - 1991/03  Osaka Prefectural College of TechnologyDepartment of Mechanical EngineeringResearch Associate

Education

• 1997/04 - 1999/03  Osaka University  Graduate School of Engineering  Division of Materials and Manufacturing Science
• 1986/04 - 1988/03  Kinki University  Graduate School of Science and Engineering Research  Mechanical Engineering Course
• 1982/04 - 1986/03  Kinki University  Faculty of Science and Engineering  Department of Mechanical Engineering

Association Memberships

• The JAPAN SOCIETY FOR DIE AND MOLD TECHNOLOGY   THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY   The Society for the Advancement of Material and Process Engineering   JAPAN SOCIETY OF COMPOSITES MATERIALS   THE SOCIETY OF MATERIAL SCIENCE, JAPAN   THE JAPAN SOCIETY OF MECHANICAL ENGINEERS   

Published Papers

• Reinforcing Effect by Carbon Fibers for Energy Director on Ultrasonic Spot Welding of Woven-CF/PPS Laminates

  TANABE Daiki; HORIUCHI Tokiyuki; NISHIMURA Souma; NISHIYABU Kazuaki

  Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 71 (6) 495 - 500 0514-5163 2021/10 [Refereed]
   

  This study aims to reveal the ultrasonic spot welding behavior and joining strength of carbon fiber reinforced thermoplastics (CFRTP) using carbon fiber reinforced energy director. The materials used for spot welding are woven carbon fiber reinforced poly phenylene sulfide (woven-CF/PPS) laminates and energy director consisting of spread carbon fiber and PPS polymer. The ultrasonic oscillator for the ultrasonic spot welding process has an oscillation frequency of 40 kHz and a maximum output of 600 W. The welding load and push-in amount of ultrasonic horn during welding process were precisely controlled by using an electric servo press machine. The effects of welding load and carbon fiber volume fraction in energy director on ultrasonic welding behavior and actual tensile shear strength were investigated to reveal the welding behaviour. The welding load and push-in amount of the ultrasonic horn was measured by a data logger. The welding part was evaluated by image analysis and cross-sectional observation using microscope. From the experimental results, it was revealed that the carbon fiber volume fraction in the energy director was significantly affects the ultrasonic welding behavior. According to the results of single lap tensile shear test, it was found that the actual tensile shear strength was increased by the addition of spread carbon fiber.
• Effects of Thickness of Polymer Based Energy Director on Ultrasonic Spot Welding Behavior of Woven-CF/PPS Laminates

  TANABE Daiki; HORIUCHI Tokiyuki; NISHIYABU Kazuaki

  Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 69 (5) 373 - 378 0514-5163 2020/05 [Refereed]
   

  This study aims to reveal the ultrasonic spot welding behavior of carbon fiber reinforced thermoplastics (CFRTP) using polymer based energy director. The materials used for spot welding are woven-CF/PPS laminates and energy director consisting of PPS polymer. The ultrasonic oscillator for the ultrasonic spot welding process has an oscillation frequency of 40 kHz and a maximum output of 600 W. The welding load and displacement of ultrasonic horn during welding process were precisely controlled by using an electric servo press machine. The effects of welding load and thickness of energy director on ultrasonic welding behavior and joining strength were investigated to reveal the welding behaviour. The temperature of the joining part during ultrasonic welding was measured by a ultrafine thermocouples, and the welding load and displacement of the horn was measured by the servo press machine. The welding part was evaluated by microscopic observation and cross-sectional observation using microscope and SEM. From the experimental results, it was revealed that the thickness of the energy director was significantly affects the ultrasonic welding behavior. From the result of single lap tensile shear test, it was found that the there was proper thickness of energy director to increase the joining strength.
• Effects of Dimension of Joining Part on Welding Behavior of Carbon Fiber Reinforced Thermoplastics using Spread and Woven Carbon Fiber Resistance Heating Element

  TANABE Daiki; KUBOHORI Fumio; TAMURA Kouta; NISHIYABU Kazuaki

  Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 68 (2) 162 - 169 0514-5163 2019/02 [Refereed]
   

  This study aims to stabilize the resistance welding of carbon fiber reinforced thermoplastic (CFRTP) using spread or woven carbon fiber heating element. The joined CFRTP parts was sateen weave CF/PPS laminates, and the material used for the resistance heating element was spread carbon fiber and plain weave carbon fiber. The effects of processing conditions such as aspect ratio of fusion joining part, applied current, conduction time, and also material conditions such as resistance heating element were investigated experimentally. The contents of evaluation were temperature distribution of resistance heating element by using a thermography, welding area ratio measured by image analysis and monitoring of electricity. From the experimental results, in the case of width size change, it was suitable for resistance welding of large area. On the other hand, in the case of length size change, it was not suitable for resistance welding because the edge effect occurred around the electrode. Subsequently, in the case of using the spread carbon fiber as resistance heating element, it was found that the thermal distribution was unevenness because of uneven distribution of carbon fibers.
• Effects of near-infrared heating and high frequency induction roller heating in continuous tape layup molding of CFRTP

  TANABE Daiki; IMAMURA Shota; NISHIYABU Kazuaki; KURASHIKI Tetsusei

  Transactions of the JSME (in Japanese) The Japan Society of Mechanical Engineers 82 (843) 16 - 00115-16-00115 2016 [Refereed]
   

  Automated thermoplastic tape laying (ATL) and automated fiber placement (AFP) are high-potential manufacturing methods for continuous carbon fiber reinforced thermoplastic (CFRTP) composites which can ensure operational safety even in highly loaded components such as aircraft wing skins and fuselages or construction large scaled structures. This study aimed to reveal the heating behavior of CFRTP in continuous tape layup molding. The material used for the experiment was unidirectional carbon fiber reinforced polyamide 6 (CF/PA6) prepreg tape. The effects of processing conditions such as output of infrared heater, feed speed of prepreg tapes and heating temperature of pressure rollers on the tape laying behavior of prepreg tape were investigated. In the case of only near infrared heating, it was revealed that the difference in temperature between the upside and downside prepreg tape was increased significantly. Then, the joining strength was decreased significantly compared with using the infrared heater, because the moisture in the prepreg tapes was not removed completely. On the other hand, when the near infrared heater and heating roller were used, the difference in temperature between the upside and downside prepreg tape was decreased considerably. It was also revealed that the surface temperature of CF/PA6 prepreg tape and singe lap tensile strength tends to increase with decreasing the feed speed of prepreg tapes.

• Electro-fusion Joining of CF/PPS Composites using Carbon Fiber Heating Elements

  TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Teltusei

  Proceedings of the JSME/ASME 2014 International Conference on Materials and Processing (ICMP2014) 2014/06 [Refereed]
  
• Effects of fiber reinforcing configuration on oxidation and melting phenomenon of CF/PPS laminated composites by electrically-conducting

  Daiki Tanabe; Kazuaki Nishiyabu; Tetsusei Kurashiki

  Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 63 (5) 368 - 373 1880-7488 2014 [Refereed]
   

  This study aims to reveal the mechanism of melting and oxidation phenomenon of CF/PPS laminated composites by electrically-conducting. The materials used are unidirectional CF/PPS and woven CF/PPS laminates. The effects of applied voltage, conducting time and fiber reinforcing configuration on melting behavior of CFRTP composites were investigated. The melting state was evaluated by microscopic observation and its image analysis. The experimental results revealed that the melting and oxidation behavior were influenced by reinforcing configuration and electric resistivity of CFRTP laminates. The melting area of both CFRTP laminates tends to increase with increasing the applied voltage and conducting time. It was found that the insertion of PPS films in melting interface was required in order to prevent the edge effect and non-uniform profile shapes of the melting area. It was also confirmed that woven CF/PPS laminates could be melted at low applied voltage. © 2014 The Society of Materials Science, Japan.
• Behavior of Debinding and Sintering in Micron and Submicron-Sized Copper Powder Injection Molded Parts

  NISHIYABU KAZUAKI; TANABE DAIKI; KANOKO YASUHIRO; TANAKA SHIGEO

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A (Web) 79 (807) WEB ONLY 1593-1603  1884-8338 2013 [Refereed]
  
• Behavior of debinding and sintering in micron and submicron-sized copper powder injection molded parts

  Kazuaki Nishiyabu; Daiki Tanabe; Yasuhiro Kanoko; Shigeo Tanaka

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A Japan Society of Mechanical Engineers 79 (807) 1593 - 1603 0387-5008 2013 [Refereed]
   

  This study aims to reveal the behavior of debinding and sintering in metal powder injection molding (MIM) process using copper powders with varied particle sizes. The feedstock composed of micron- and submicron-sized copper powders and polyacetal-based binder was adequately prepared. Oxidation process was added between debinding and sintering steps for decarburizing. The effects of processing temperature in debinding, oxidation and sintering were evaluated from the changes in weight, dimension, and residual carbon and oxygen contents in addition to microstructure. From the results obtained using micron- and submicron-sized copper powders, it was clarified that the oxidation conditions was very important for stably-obtaining the high dense sintered parts with lower carbon and oxidation contents. This is considered to be due to the mechanism that the binder was removed from green compacts at 873K in vacuum, and then copper oxide whiskers form on the surface of copper powder and grow to connect the particles each other by oxidizing in air. The experimental result showed that using submicron-sized powder could obtain the sufficient high dense sintered parts under low sintering temperature (973K). © 2013 The Japan Society of Mechanical Engineers.
• Processing of polymer-derived porous SiC body using allylhydridopolycarbosilane (AHPCS) and PMMA microbeads

  Masaki Kotani; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka

  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI 119 (1391) 563 - 569 1882-0743 2011/07 [Refereed]
   

  A simple method for making a porous SiC body through a polymeric route at one firing processing was demonstrated by the sacrificial filler template approach. By incorporating sacrificial pore-forming plastic powder, PMMA microbeads, into liquid preceramic polymer, AHPCS, and losing it after the polymer was hardened, a preceramic porous body was formed. As a consequence of systematic examination of the effects of particle size and mixture ratio of the powder, an AHPCS-derived porous SiC body was reproducibly formed without critical crack initiation. It was enabled only when the polymer was sufficiently contained to make a strong skeletal structure with the sacrificial plastic particles closely distributed. The porous microstructure would contribute to efficient gas emission and uniform thermal shrinkage during polymer pyrolysis, which reduced internal pressure and crack-causing thermal stress. (C)2011 The Ceramic Society of Japan. All rights reserved.
• Fabrication of micro-structured parts by nano-imprint lithography sacrificial plastic mold insert MIM using nano-sized copper powder

  Kazuaki Nishiyabu; Daiki Tanabe; Yasuhiro Kanoko; Shigeo Tanaka

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A 77 (780) 1378 - 1387 0387-5008 2011 [Refereed]
   

  This study aims to develop the manufacturing method of micro-structured parts by the metal powder injection molding (MIM) inserted micro-sacrificial plastic molds which were prepared by nano-imprint lithography (NIL) technique. In this process named NIL/μ-SPiMIM, the feedstock composed of nano-sized copper powder and polyacetal-based binder was adequately prepared and molded into polymethylmethacrylate films with fine line-scan structures, and the molded parts were sintered in a reductive gas atmosphere followed by solvent debinding of the films. The behavior in debinding and sintering was investigated by thermo-gravimetric analysis, carbon and oxygen analysis and SEM observation. The effects of sintering temperature on sintered density, shrinkage, and profile accuracy were evaluated systematically. It can be concluded that the manufacturing method named NIL/μ-SPMIM proposed in this study has great potential to produce precisely 3 dimensional complex metallic parts with fine micro-structures. © 2011 The Japan Society of Mechanical Engineers.
• Fabrication of Micro-Structured Parts by Nano-Imprint Lithography Sacrificial Plastic Mold Insert MIM Using Nano-Sized Copper Powder

  NISHIYABU Kazuaki; TANABE Daiki; KANOKO Yasuhiro; TANAKA Shigeo

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 一般社団法人 日本機械学会 77 (780) 1378 - 1387 1884-8338 2011 [Refereed]
   

  This study aims to develop the manufacturing method of micro-structured parts by the metal powder injection molding (MIM) inserted micro-sacrificial plastic molds which were prepared by nano-imprint lithography (NIL) technique. In this process named NIL/μ-SPiMIM, the feedstock composed of nano-sized copper powder and polyacetal-based binder was adequately prepared and molded into polymethylmethacrylate films with fine line-scan structures, and the molded parts were sintered in a reductive gas atmosphere followed by solvent debinding of the films. The behavior in debinding and sintering was investigated by thermo-gravimetric analysis, carbon and oxygen analysis and SEM observation. The effects of sintering temperature on sintered density, shrinkage, and profile accuracy were evaluated systematically. It can be concluded that the manufacturing method named NIL/μ-SPiMIM proposed in this study has great potential to produce precisely 3 dimensional complex metallic parts with fine micro-structures.
• Fabrication of micro-structured parts by resist-film insert metal injection molding and effects of particle size

  Kazuaki Nishiyabu; Kenichi Kakishta; Shigeo Shigeo

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A Japan Society of Mechanical Engineers 76 (761) 75 - 80 0387-5008 2010 [Refereed]
   

  The manufacturing method of resist film insert metal powder injection molding (MIM) namely Resist/μ-SpiMIM process has been proposed. The resist film made of PMMA polymer with numerous micro-holes was used as micro sacrificial plastic mold (SP-mold). A novel molding machine which could achieve to mold without pelletizing was also used to produce the green compacts with a high efficiency in experiment by using a small amount of feedstock. The feedstock prepared by pure copper powders with various particle sizes was injection-molded into the SP-mold and the sintered parts with micro-pillar structure were produced after debinding and sintering process. The effects of particle size on density, shape-transcription and surface roughness of those sintered parts were discussed. The decreasing of particle size results in a marked improvements of surface roughness, transcription and dimensional variation of sintered parts.
• Effect of micro/nano powder ratio on the properties of copper sintered parts produced by metal injection molding

  Kazuaki Nishiyabu; Kenichi Kakishita; Shigeo Tanaka

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A Japan Society of Mechanical Engineers 76 (767) 996 - 1001 0387-5008 2010 [Refereed]
   

  In microminiaturization of metal injection molding, the use of finer metal powders is one of solutions for improving the dimensional accuracy and surface roughness of sintered products. This study aims to investigate the effects of micro/nano powder ratio on the properties of sintered parts in μ-MIM process. A novel experimental machine which can achieve to mold without pelletizing was used to produce the tiny specimens with high trial efficiency and a small amount of feedstock. Small dumbbell specimens were produced with changing the binder content and the fraction of micro/nano copper powders. The effects of nano copper powder addition on the tap density of mixed powder, the viscosity of MIM feedstock and the grain size, surface roughness and tensile strength of sintered parts were revealed.
• Accuracy evaluation on SUS ultra-compact module 0.07mm gears manufactured by MIM

  Kazuaki Nishiyabu; Shigeo Tanaka

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 56 (5) 268 - 273 0532-8799 2009/05 [Refereed]
   

  A microplanetary gears made of stainless steel has been developed by micro metal powder injection molding (μ-MIM) process. In this stud., the accuracy and the quality of ultra-compact planet gear (module: m = 0.07 m., number of teeth: z=24) was evaluated. Cross-sections of the gear teeth were observed with a digital microscope and dimensions of the teeth were measured with a digital image processing. The variations in dimensions and shape of gear teeth were systematically investigated for mol., green and sintered part., and heat treated ones. The accuracy classes of the ultra-compact planet gear were defined from four shape variations of gear teet., i.e. total runou., single pitch deviatio., accumulated pitch deviation and tooth profile deviation. The accuracy class was concluded as JIS N class seven which is a comparatively high precise levei for practical applications.
• Insertion Testing of Polyethylene Glycol Microneedle Array Cultured Human Skin with Biaxial Tension

  TAKANO Naoki; TACHIKAWA Hiroto; MIYANO Naoya; NISHIYABU Kazuaki

  Journal of Solid Mechanics and Materials Engineering The Japan Society of Mechanical Engineers 3 (3) 504 - 612 1880-9871 2009/03 [Refereed]
   

  Aiming at the practical use of polyethylene glycol (PEG) microneedles for transdermal drug delivery system (DDS), a testing apparatus for their insertion into cultured human skin has been developed. To simulate the variety of conditions of human skin, biaxial tension can be applied to the cultured human skin. An adopted testing scheme to apply and control the biaxial tension is similar to the deep-draw forming technique. An attention was also paid to the short-time setup of small, thin and wet cultured skin. One dimensional array with four needles was inserted and influence of tension was discussed. It was found that tension, deflection of skin during insertion and original curvature of skin are the important parameters for microneedles array design.
• 金属粉末射出成形の最近の進歩

  西籔 和明

  日本材料学会｢材料｣ 58 (1) 87 - 92 2009/01
• Small is better if testing MIM nano theories

  Kazuaki Nishiyabu; Shigeo Tanaka

  Metal Powder Report Elsevier Ltd 63 (3) 28 - 32 1873-4065 2008 [Refereed]
   

  The jury would still appear to be out considering the benefits of nanotechnology in metal injection moulding. Japanese researchers built their own tiny table-top direct mixing injection moulding machine to put theory to the test.... © 2008 Elsevier Ltd. All rights reserved.
• Accuracy Evaluation of Ultra-compact Gears Manufactured by The MicroMIM Process

  西籔和明; Ian Andrews; 田中茂雄

  Inovar Communications Ltd., Powder Injection Molding International 2 (4) 60 - 63 2008
• Liquid Infiltration Property of Micro-Porous Stainless Steel Produced by Powder Space Holder Method

  K. Nishiyabu; S. Matsuzaki; S. Tanaka

  POROUS METALS AND METALLIC FOAMS: METFOAM 2007 DESTECH PUBLICATIONS, INC 2 (3) 137 - + 2008 

  A production method for micro-porous metal components has been developed by applying the powder space holder (PSH) method to metal powder injection molding (MIM) process. This paper deals with the liquid infiltration property of micro-porous metals produced by the PSH method. The material used is high-corrosion resistant austenitic stainless steel 316L, and the samples have micro-sized open porous structures with high specific surface area. The test apparatus for evaluating the liquid infiltration performance of the porous specimens was developed using analytical balance. From the weight change in liquid infiltration test, the factors affecting water absorption behavior of porous specimens were studied. The results of the infiltration rate were linked to some important characteristics of the porous specimens such as mean pore diameter, liquid and gas permeability and specific surface area measured by capillary flow porometry. The effects of pore size on the infiltration rate were between those of porous specimens with a single digit pm and 15 mu m in mean constricted pore diameter.
• Fabrication of Silicon Carbide Porous Body by Powder Space Holder-Polymer Impregnation and Pyrolysis Method

  NISHIYABU Kazuaki; MATSUZAKI Satoru; KOTANI Masaki

  Transactions of the Japan Society of Mechanical Engineers Series B The Japan Society of Mechanical Engineers 74 (743) 988 - 993 0387-5008 2008 [Refereed]
   

  The hybrid process, Polymer Impregnation and Pyrolysis combined with Powder Space Holder (PSH-PIP) method, has been newly developed to improve the reliability in structure and mechanical properties of SiC/SiC composite. This process can yield an open micro-porous structure derived from a precursor polymer which is ready for being densified by a subsequent PIP processing. Systematic experimental study has been done for the effects of the size and the fraction of the space holding particles on the microstructure. Consequently, SiC porous bodies without any significant cracks were successfully obtained by achieving efficient gas purge and homogeneous thermal shrinkage.
• Fabrication of micro porous metal components by metal injection molding based powder space holder method

  Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka

  HIGH TEMPERATURE MATERIALS AND PROCESSES FREUND PUBLISHING HOUSE LTD 26 (4) 257 - 267 0334-6455 2007 [Refereed]
   

  A novel production method for the metal components with micro-sized porous structures has been developed by applying the powder space holder (PSH) method to the metal powder injection molding (MIM) process. This production method is compatible with widespread applications with high functionality such as heat sinks, electrodes and medical implants and so on. These applications can benefit from the advantages provided by micro-porous metal components with complicated shapes using most kinds of metal powder. The aim of this study is to clarify the effects of material combinations and production conditions on the pore formation and some physical properties of sintered porous metals. The green compacts were molded via uniaxial hot pressing for an experiment using various porous compounds which were prepared by changing the combinations in size of stainless steel 316L powder and polymethylmethacrylate (PMMA) space holding particle. Afterwards they were sintered at various temperatures after thermal debinding. It was confirmed that the size of metal powder and space holding particle together with the sintering temperature were main factors affecting the pore size, porosity, surface area ana shrinkage of sintered porous metals. It was concluded that the PSH-MIM method proposed was useful for producing metal components with micro-sized and high functionally porous structures.
• Net-shape manufacturing of micro porous metal components by powder injection molding

  Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka

  PROGRESS IN POWDER METALLURGY, PTS 1 AND 2 TRANS TECH PUBLICATIONS LTD 534-536 981 - + 0255-5476 2007 [Refereed]
   

  A novel production method for porous metal components has been developed by applying powder space holder (PSH) method to metal powder injection molding (MIM) process. The PSH-MIM method has an industrial competitive advantage that is capable of net-shape manufacturing the micro-sized porous metal products with complicated shapes and controlled porosity and pore size. In this study, the small impeller with homogeneous micro-porous structure was manufactured by the PSH-MIM method using porous compounds composed of fine stainless steel 316L powder and polymethylmethacrylate (PMMA) particle. The effects of combinations in size and fraction of PMMA particle on dimensional tolerance and variation of sintered porous specimens were investigated. It was concluded that the PSH-MIM method could manufacture commercially micro-porous metal components with high dimensional accuracy.
• Micro metal injection molding using hybrid micro/nano powders

  Kazuaki Nishiyabu; Kenichi Kakishita; Shigeo Tanaka

  PROGRESS IN POWDER METALLURGY, PTS 1 AND 2 TRANS TECH PUBLICATIONS LTD 534-536 381 - + 0255-5476 2007 [Refereed]
   

  This study aims to investigate the effects of hybrid micro/nano powders in a micro metal injection molding (mu-MIM) process. A novel type of mixing-injection molding machine was used to produce tiny specimens (< 1 min in size) with high trial efficiency using a small amount of feedstock (< 0.05 cm(3) in volume). Small dumbbell specimens were produced using various feedstocks prepared by changing binder content and fraction of nano-scale Cu powder (130nm in particle size). The effects of adding the fraction of nano-scale Cu powder on the melt viscosity of the feedstock, microstructure, density and tensile strength of sintered parts were discussed.
• Innovations in micro metal injection molding process by lost form technology

  Kazuaki Nishiyabu; Yasuhiro Kanoko; Shigeo Tanaka

  PROGRESS IN POWDER METALLURGY, PTS 1 AND 2 TRANS TECH PUBLICATIONS LTD 534-536 369 - + 0255-5476 2007 [Refereed]
   

  The production method of micro sacrificial plastic mold insert metal injection molding, namely mu-SPiMIM process has been proposed to solve specific problems involving the miniaturization of MIM. The sacrificial plastic mold (SP-mold) with fine structures was prepared by injection-molding polymethylmethacrylate (PMMA) into Ni-electroform, which is a typical LIGA ((L) under bar ithographie-(L) under bar alvanoformung-(L) under bar blonnLing) process. Stainless steel 316L feedstock was injectionmolded into the SP-mold which had micro structures with multi-pillars. The green compact was demolded as one component with the SP-mold, which was decomposed along with binder constituent of feedstock in debinding process. This study focused on the effects of metal particle size and processing conditions on the shrinkage, transcription and surface roughness of sintered parts, which were evaluated by SEM (Scanning Electron Microscope) observation.
• Gas nitriding mechanism in titanium powder injection molded products

  Toshiko Osada; Hideshi Miura; Takanobu Yamagami; Kazuaki Nishiyabu; Shigeo Tanaka

  PROGRESS IN POWDER METALLURGY, PTS 1 AND 2 TRANS TECH PUBLICATIONS LTD 534-536 361 - + 0255-5476 2007 [Refereed]
   

  Gas surface treatment is considered to be especially effective for Titanium because of its high reactivity. In this study, we investigated the gas nitriding mechanism in titanium sintered parts produced by metal powder injection molding (MIM) process. In MIM process, gas nitriding can be surface-treated subsequently after debinding and sintering process. Then, the microstructure and nitrogen content of sintered MIM parts are considered to be greatly influenced by not only nitriding conditions but also sintered conditions. In this study, the effects of sintering time on microstructure such as nitrided layer thickness and hardness was investigated. Focus was given to the effects of specimen size on nitriding process, because the size of micro metal injection molding (mu-MIM) product is so small and the specific surface of that product is so large that the mechanical and functional properties can be subject to change by nitriding.
• Dimensional accuracy of micro-porous metal injection and extrusion molded components produced by powder space holder method

  Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 53 (9) 776 - 781 0532-8799 2006/09 [Refereed]
   

  A production method for porous metal components has been developed by applying powder space holder (PSH) method to metal powder injection molding (MIM) process. The PSH-MIM method has an industrial advantage which is capable of net-shape manufacturing the micro-size porous metal products with complicated shapes and controlled porosity and pore size. In this study, a small impeller made of stainless steel 316L was manufactured by injection molding, and a plate specimen was produced by extrusion molding to evaluate the dimensional accuracy of the porous sintered parts produced by the PSH-MIM method. The effects of combinations of size and fraction of space holder particle on the dimensional deviation and its coefficient of variance were investigated. It was concluded that the PSH-MIM method could manufacture commercially micro-porous metal components with high dimensional accuracy.
• Size effects of gas nitriding of injection molded Titanium parts

  Toshiko Osada; Shigeo Tanaka; Kazuaki Nishiyabu; Hideshi Miura

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 53 (9) 745 - 749 0532-8799 2006/09 [Refereed]
   

  In this study, gas nitriding was performed to various sizes of Titanium parts which were produced by metal injection molding (MIM) process, in order to add the high functionality with low processing cost. It was shown from the experiments that the nitriding treatment was useful for increasing the hardness of the surface which microstructure changed to the TiN and acicular α-Ti phase. With respect to the effect on the size of parts, micro dumbbell specimen had around five times higher content of nitrogen than block ones. It was suggested that the size of μ-MIM products is so small that the surface treatment contribute significantly and easily to improve the properties, especially gas nitriding process is one of effective surface treatment methods for high functionality of μ-MIM products.
• Sliding wear behavior of stainless steel parts made by metal injection molding (MIM)

  K Kameo; K Nishiyabu; K Friedrich; S Tanaka; T Tanimoto

  WEAR ELSEVIER SCIENCE SA 260 (6) 674 - 686 0043-1648 2006/03 [Refereed]
   

  The wear resistance of stainless steel parts, which were fabricated by a metal injection molding (MIM) process, was studied under self-mating, dry sliding conditions, using a pin-on-disk type wear configuration. The materials used were an austenitic stainless steel 316L (of MIM and wrought steel), a precipitated stainless steel 174PH (of MIM and wrought steel) and a widely used ball-bearing steel (DIN 100Cr6). Two surface conditions, i.e. as sintered and as polished, were considered in the wear tests of the MIM samples. In summary, the wear resistance of 316L was lower than 17-4PH, and the latter was almost the same as 100Cr6. Further, the wrought materials showed a better wear resistance than the MIM materials. The mechanisms responsible for these tendencies were discussed by means of microscopical observations and chemical inspections of the worn surfaces and the microstructures of the samples. (c) 2005 Elsevier B.V. All rights reserved.
• マイクロ犠牲樹脂型インサート金属粉末射出成形による高機能ばねの創製

  西藪 和明; 柿下 健一; 鹿子 泰宏

  日本ばね学会 ばね論文集 日本ばね学会 (51) 55 - 62 0385-6917 2006
• Effects of metal powder characteristics on the compactibility and sinterability in micro metal injection molding process

  Toshiko Osada; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka; Hideshi Miura

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A 72 (713) 148 - 153 0387-5008 2006 [Refereed]
   

  Metal injection molding for tiny parts is called micro metal injection molding, " μ-MIM" which is considered to be one of promising process to manufacture the micro parts for various applications. In μ-MIM, the feedstock properties, particularly particle size and shape of metal powder are significantly important for the quality of micro parts. The purpose of this study is to investigate the effect of metal powder characteristics on the compactibility and sinterability. The three types of powders (3 μm and 9 μm water-atomized powders and 3 μm gas atomized powder) were used for the comparison. The melt viscosity of the feedstock was utilized as an index for evaluation of compactibility by injection moding. Then the spring shape of green compact specimen was produced by the micro injection molding machine. The green density was also evaluated for compactibility of the feedstock. The density and grain size of sintered specimens were investigated by changing sintering temperature and time.
• Surface functionalization processes in metal injection moulding

  Toshiko Osada; Shigeo Tanaka; Kazuaki Nishiyabu; Hideshi Miura

  Euro PM 2006 - Powder Metallurgy Congress and Exhibition 2 111 - 116 2006 

  © Euro PM 2006 - Powder Metallurgy Congress and Exhibition. All rights reserved. In this study, one of the surface functionalization processes, nitriding, is applied to Titanium MIM parts. To investigate the effect of the specific surface on the nitriding state three types of specimens, with different thickness, were adopted to nitriding. The nitrogen content of nitrided samples was evaluated by weight increase. The nitrogen content of the specimens increased with an increase in the specific surface. Moreover, to clarify the effect of nitriding conditions on nitrogen content, the nitrogen partial pressure in the furnace was controlled. The nitrogen content of specimens nitriding under a higher nitrogen partial pressure was higher than that of specimens in lower pressure environment. Micro Vickers hardness of micro dumbbell specimen was higher than that of block specimen, because of large specific surface; the nitrogen content inside the micro dumbbell specimen is also higher than that of the block specimen.
• 金属粉末射出成形のマイクロ化への挑戦

  田中茂雄; 西籔和明

  日本塑性加工学会誌｢塑性と加工｣ 46 (538) 24 - 29 2005/11
• デジタル画像処理技術を用いたテキスタイル複合材料の非接触ひずみ分布計測

  西籔 和明

  日本繊維機械学会誌 ｢繊維工学｣ 58 (2) 2005/01
• Porous graded materials by stacked metal powder hot-press moulding

  K Nishiyabu; S Matsuzaki; K Okubo; M Ishida; S Tanaka

  FUNCTIONALLY GRADED MATERIALS VIII TRANS TECH PUBLICATIONS LTD 492-493 (493) 765 - 770 0255-5476 2005 [Refereed]
   

  The production method for metal components with micro sized porous structure has been developed by applying "powder space holder method" to metal powder injection molding process. In this study, a co-sintering process was utilized to make a plate of sintered metal with micro porous graded structure, The green compact sheets with various contents of space hold particles were prepared by hot press molding for simplification. The five layers of metal with symmetric structure, which the skin layer was formed with high density metal and the core was formed with open or closed porous structure, or with inverse symmetry, was obtained by changing stacking sequence in co-sintering process. Mechanical properties of the materials with plain homogeneous porous structure and porous graded structure were compared. The usefulness of proposed method for producing the metal components with micro porous graded structure and the effective of graded structure to compensate the deficiencies on the mechanical property of porous metals was shown.
• Fabrication method of micro structured parts by metal injection molding with LIGA process

  Satoru Matsuzaki; Shigeo Tanaka; Kazuaki Nishiyabu

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy Journal of the Japan Society of Powder and Powder Metallurgy 52 (1) 55 - 59 0532-8799 2005 [Refereed]
   

  This study aims to investigate the possibility for producing micro metal structured parts by applying micro metal injection molding (μ-MIM), the insert μ-MIM methods based on LIGA process were proposed, which used two types of sacrificial molds for MIM processing as following 1) PMMA (polymethylmethacrylate) resist and 2) PMMA mold injected in Ni electroformed mold. These processes were named "LIGA/μ-iMIM method" and the feasibility was checked by using SUS316L stainless steel powders. It was demonstrated that this method had a great potential to produce micro metal structured parts, also confirmed that the finer metal powders were better for their transcription than the coarse one.
• デジタル画像処理技術を用いたテキスタイル複合材料の非接触ひずみ分布計測

  日本繊維機械学会誌｢繊維工学｣ 58 (2) 2005
• Fabrication and mechanical properties of functionally graded micro porous metals by MIM-base powder space holder method

  K Nishiyabu; S Matsuzaki; S Tanaka

  Sandwich Structures7: Advancing with Sandwich Structures and Materials SPRINGER 733 - 742 2005 [Refereed]
   

  This study describes the manufacturing method based on metal powder injection moulding for micro porous metal components with high functionally graded sandwich structure. The effectiveness of sandwich structure produced by co-sintering and co-injection moulding processes to compensate the deficiencies on the mechanical property of porous structures, was investigated.
• Sandwich injection moulding and physical properties of cup-stacked carbon nanotube/polypropylene and polypropylene

  K Okubo; S Tanaka; N Oya; K Nishiyabu; T Yanagisawa; M Tomita

  SANDWICH STRUCTURES7: ADVANCING WITH SANDWICH STRUCTURES AND MATERIALS SPRINGER 743 - 752 2005 [Refereed]
   

  This study describes the manufacturing method and physical properties of sandwich structure tubes using cup-stacked carbon nanotube/polypropylene and polypropylene. The effectiveness of sandwich structure produced by sequential injection moulding to enhance the axial and transverse compressive properties of thermoplastics was investigated. It was shown that compressive properties of the sandwich tubes effectively improved by proportionally positioning rich nanotube materials to the outer layer.
• Study on large deformation characteristics of knitted fabric reinforced thermoplastic composites at forming temperature by digital image-based strain measurement technique

  N Takano; M Zako; R Fujitsu; K Nishiyabu

  COMPOSITES SCIENCE AND TECHNOLOGY ELSEVIER SCI LTD 64 (13-14) 2153 - 2163 0266-3538 2004/10 [Refereed]
   

  The continuous fiber reinforced thermoplastic composites, such as textile composites, have many attractive properties and functions and they are used widely nowadays in industrial applications. The important point in the design and manufacturing is that the composites as well as the reinforcing textiles undergo large deformation during thermoforming, which is much influential on the overall properties. Hence, the large deformation characteristics must be investigated at thermoforming temperature. For this sake, the digital image-based measurement technique of large strain distribution is developed. It is applicable to arbitrary complex shaped components with the help of 3D-CAD. As the large strain definition, Biot's strain is adopted that is calculated by the polar decomposition of the deformation gradient tensor based on continuum mechanics. The developed strain measurement technique is applied to the deep-drawing of aramid rib-knitted fabric reinforced polypropylene composites. The comparison between rib and plain-knitted fabrics reinforced composites is studied and many differences are found. The large deformation characteristics are also investigated from microscopic point of view under uniaxial tension at thermoforming temperature. (C) 2004 Elsevier Ltd. All rights reserved.
• Fabrication and evaluation of micro parts by metal injection molding

  Toshiko Osada; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka; Hideshi Miura

  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A 70 (698) 1522 - 1528 0387-5008 2004 [Refereed]
   

  This study describes the micro evaluation methods for investigating the feedstock properties and the process conditions for industrial mass production of micro parts by Metal Injection Molding (MIM). The effects of feedstock properties such as particle size and powder loading on the sintered properties of micro-dumbbell specimens were investigated under various injection-molding conditions. Small particle size and high powder loading significantly improved the quality such as density and tensile strength, as well as yield percentage in producing sound micro-dumbbell sintered specimens. Deformation and fracture propagation behaviors were observed with the in-situ SEM tensile test which was useful to comprehend the influences of feedstock properties on the mechanical properties of the micro MIM (μ-MIM) products.
• Evaluation on the homogeneity of feedstock for micro size parts produced by MIM

  Toshiko Osada; Kazuaki Nishiyabu; Yasuo Karasaki; Shigeo Tanaka; Hideshi Miura

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy Journal of the Japan Society of Powder and Powder Metallurgy 51 (6) 435 - 440 0532-8799 2004 [Refereed]
   

  Producing the micro size parts by Metal Injection Molding (MIM) needs more sophisticated technique than the conventional injection molding. Especially, inhomogeneous state of the feedstock will strongly influence on the quality of the final products. In order to evaluate the mixing and palletizing conditions of the feedstock, statistical variations of density and binder contents in individual pellet were investigated by the weight measurement. These variations were discussed with coefficient of variation. The micro dumbbell specimens were fabricated using the feedstock, and the density and strength were investigated. Moreover, in order to improve the feedstock properties, re-pelletizing was performed. It was found that the homogeneity of the pellet was one of the important factors for quality of the micro size parts produced by MIM.
• Strain concentrations in woven fabric composites with holes

  Surya D. Pandita; Kazuaki Nishiyabu; Ignaas Verpoest

  Composite Structures 59 (3) 361 - 368 0263-8223 2003 [Refereed]
   

  A strain mapping technique, namely digital photogrammetry, was used to investigate the tensile strain field of woven fabric composites in the presence of stress concentrations caused by geometrical defects consisting of circular or elliptical holes. Plain woven fabrics were used. The strain mapping technique clearly revealed the strain concentrations near the singularity. The strain concentrations are influenced by the tensile loading direction and the hole dimension relative to the size of the unit cell of the plain woven fabrics. A preliminary comparison of stresses approximately calculated from the strain field and theoretical stresses calculated from existing models such as Lekhnitskii's model is also presented. © 2003 Elsevier Science Ltd. All rights reserved.
• Digital Image-Based Measurement of Large Strain Distribution in Molded Components of Textile Composites

  TAKANO Naoki; ZAKO Masaru; FUJITSU Reiko; NISHIYABU Kazuaki

  Journal of the Japan Society for Composite Materials JAPAN SOCIETY FOR COMPOSITE MATERIALS 29 (1) 17 - 23 0385-2563 2003 [Refereed]
   

  Textile composite materials have large deformation characteristics, which leads to the superior formability. However, the large deformation of the textile preform is very much influential on the properties of the molded composite components. Hence, this paper aims at the measurement of large strain distribution in the complex shaped molded components of textile composites. A novel digital image-based procedure is proposed. The Green-Lagrange strain tensor is employed to express the large strain exactly and to avoid the misestimation due to the unmeasureable rotational motion during the closed molding. In pursuit of this, the deformation gradient tensor is calculated by the digitized information from the lattice pattern image drawn on the molded component. The proposed method is demonstratively applied to the deep-drawn components of rib-knitted fabric thermoplastic composites.
• Numerical analysis and in-situ SEM observation of damage development for woven fabric composite materials

  Yasutomo Uetsuji; Masaru Zako; Kazuaki Nishiyabu

  Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 51 (10) 1147 - 1153 0514-5163 2002 [Refereed]
   

  Although woven fabric composite materials have high performance, it is very difficult to reveal their mechanical behaviours due to the geometric complexity by theoretical analysis. Especially under damage development, several kinds of failure mode such as matrix cracking, fiber breaking and transverse cracking in fiber bundle affect the mechanical behaviour strongly. In order to analyze the mechanical behaviour, three-dimensional finite element analytical procedure based on damage mechanics has been developed. In this paper, the developed procedure is applied to plain woven fabric composites, and the mechanical behaviour under damage development by on-axis tensile load has been analyzed. On the other hand, on-axis tensile test has been performed in SEM and the change development at the edge cross-section of specimen has been observed. As a result, it can be confirmed that the calculational and the experimental results have a good agreement. Then, the mechanical behaviour depends on the edge effect of free side surface. Therefore the effect of free edge has been evaluated quantitatively by numerical analysis from comparison with mechanical behaviour under periodic boundary condition without free side surface. From the above results, it is recognized that the proposed procedure is very useful for the material design of woven fabric composite materials.
• Mechanical and Antibacterial Properties of Copper-added Austenitic Stainless Steel (304L) by MIM

  Journal of Korean Powder Metallurgy Institute 9 (4) 227 - 234 2002 [Refereed]
  
• Evaluation on mechanical properties and functionalities of anti-bacteria and resist-corrosion for Cu-added stainless steel (SUS304L) by MIM

  Yooshikazu Masai; Masashi Ishida; Shigeo Tanaka; Kazuaki Nishiyabu

  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy Funtai Funamtsu Yakin Kyokai/Japan Soc. of Powder Metallurgy 49 (9) 834 - 840 0532-8799 2002 [Refereed]
   

  The effect of copper-added content and sintering temperature on the mechanical properties and functional performances such as anti-bacteria and resist-corrosion for the stainless steel by metal injection molding was investigated. The specimens were prepared by injection molding the mixed powders of water-atomized SUS304L and Cu with poly-acetyl binder. The green compacts were prepared at five steps of copper-added content from 0mass%Cu to 5mass%Cu and they were sintered at the six steps of temperature from 1050 to 1350°C for 7.2ks in Ar gas after the debinding process at 600 °C for 7.2 ks in N2 gas. The relative density and tensile strength of sintered compacts showed the minimum values by addition of 5mass%Cu and 8mass%Cu, respectively. They were modified up to original value by addition of 10mass%Cu and sintering at 1100°C. The anti-bacterial test based on film contact to bacilli and the quantitative analysis of copper ion dissolved to water showed high effective as increasing the copper-added content. It was also confirmed from the measurement of pitting potential that copper addition modifies the resist-corrosion performance.
• Preparation of flexible interphase in FRP and determination of the finite thickness

  Naoyuki Oya; Kazuaki Nishiyabu; Hiroyuki Hamada

  Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 51 (5) 483 - 488 0514-5163 2002 [Refereed]
   

  This paper describes experimental developments for a concise preparation method of flexible interphase in commonly used GFRP and determination methods of the finite interphase thickness. The preparation scheme of the flexible interphase basically comprises surface coating of glass fibres with toughened epoxy resin. The finite thickness of the flexible interphase is determined by means of scanning electron microscopy equipped with energy dispersive X-ray element analyser and visco-elasticity image analysis featured in a scanning probe microscope. Certain evidences are successfully observed for the flexible interphase to be created by means of the proposed preparation method. However, it is found that the interphase thickness obtained from each method exhibits different values due to the particular sample status. The model composite used in the X-ray method contains a platinum layer as a boundary-indicator between the flexible interphase and the matrix resin. The platinum layer may hinder the interacting diffusion between the interphase and the matrix during the curing process, and this probably causes the broader interphase to remain in the model composite used in the X-ray method. Both methods are found to be useful to evaluate the interphase thickness around the single glass-filament at the microscopic level. However, those results show relatively large scatters this means that more efforts are still needed to create the interphase uniformly around the glass fibres using more sophisticated surface treatment techniques.
• Microstructure-based deep-drawing simulation of knitted fabric reinforced thermoplastics by homogenization theory

  N Takano; Y Ohnishi; M Zako; K Nishiyabu

  INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES PERGAMON-ELSEVIER SCIENCE LTD 38 (36-37) 6333 - 6356 0020-7683 2001/09 [Refereed]
   

  Process simulation of fiber reinforced composite materials is an important research theme for the development of low-cost and advanced functional composite materials. This paper aims at the simulation of deep-drawing process of knitted fiber reinforced thermoplastics and its verification. The feature of the simulation is that the large deformation of the knitted microstructures can be traced everywhere in the deep-drawn product. The homogenization theory is applied to analyze the micro-macro coupled behaviors of the knitted fabric composite material. By employing a simplified nonlinear computational algorithm, the deep-drawing simulation was carried out on a personal computer. The predicted largely deformed microstructures were compared with the experimental results. The numerical results and experimental ones agreed quite well. This deep-drawing simulation requires us to prepare only the mechanical properties of the constituents, while it provides us all the necessary quantities such as the deformation, strain, stress and stiffness from both microscopic and macroscopic standpoints. (C) 2001 Elsevier Science Ltd. All rights reserved.
• 成形シミュレーション

  西籔 和明

  日本複合材料学会誌 JAPAN SOCIETY FOR COMPOSITE MATERIALS 27 (1) 56 - 64 0385-2563 2001/01
• Deep-Drawing Simulation of Knitted Fabric Reinforced Thermoplastics by Homogenization Theory and Experimental Verification(Special Issue on Composite Materials)

  TAKANO Naoki; OHNISHI Yoshihiro; NISHIYABU Kazuaki; ZAKO Masaru

  Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 50 (5) 461 - 467 0514-5163 2001 [Refereed]
   

  A novel computational method for deep-drawing simulation of composite materials has been proposed with taking a three-dimensional continuum mechanics approach. The most notable feature is the consideration of micro-macro coupling effects by the mathematical homogenization theory. The homogenized properties and the constitutive law are evaluated carefully using the three-dimensional microstructure model under the large deformation and biaxial loading conditions. In this paper, the knit reinforcement of aramid fiber is studied, which has very complex microstructure architecture. The polypropylene is used as the matrix. The newly developed deep-drawing simulation provides us the macroscopic deformation, strain, stress and stiffness distribution as well as the largely deformed microstructures in the deep-drawn product. The high-speed computing technique which has been developed in the previous report enables us to carry out the micro-macro coupled nonlinear analysis easily on the personal computer. The experimental work has also been conducted, and the largely deformed microstructures are compared between experiment and simulation. A good coincident was obtained, which implies the validity and reliability of the proposed computational method.
• Fabrication and mechanical properties of polymorphism composites inserted with knitted polyethylene fabric reinforced polyethylene

  T Fukui; A Nakai; H Hamada; K Nishiyabu

  2001: A MATERIALS AND PROCESSES ODYSSEY, BOOKS 1 AND 2 SOC ADVANCEMENT MATERIAL & PROCESS ENGINEERING 46 2409 - 2420 0892-2624 2001 [Refereed]
   

  In this study, reinforcement and matrix derived from the same kind of thermoplastics were used for polymorphism composite materials. The advantage of this material is not needed to take a chemical micmatch in adhesion into accout because the active cohesive force acts in the interface between fiber and matrix. The concept of such a material combination in composites can be applied for many kinds of thermoplastic materials. In this paper, Weft-knitted Polyethylene fabric reinforced Polyethylene sheet (namely, PE/PE sheet) was prepared by film stacking method. The effects of mold temperature in film stacking process on mechanical properties of PE/PE sheet were investigated. Injection molding specimens were prepared by inserting the PE/PE sheet, and low-density Polyethylene was used as matrix for injection molding, Mechanical properties of PE/PE injection composites were investigated. The tensile strength of PE/PE composites was higher than that of only PE matrix. The experimental results give evidence of the strong interface in PE/PE composite. In addition, the volume fraction of knitted fabric injection composite was only 4%, nevertheless the reinforcing efficiency is surprisingly high for the low fraction of reinforcement.
• Formulation of homogenization method applied to large deformation problem for composite materials

  N. Takano; Y. Ohnishi; M. Zako; K. Nishiyabu

  International Journal of Solids and Structures Elsevier Science Ltd 37 (44) 6517 - 6535 0020-7683 2000 [Refereed]
   

  In order to analyze the mechanical behaviors of composite materials under large deformation, the formulation of the homogenization method is described. In this formulation, assuming that the microstructures in a local region of the global structure are deformed uniformly and that consequently the microscopic periodicity remains in the local region under large deformation, the microscopic deformation is precisely defined by the perturbed displacement and product of macroscopic displacement gradient and microscopic coordinates. Finally, microscopic and macroscopic equations are obtained. The above mentioned assumption of the periodicity of microstructures is experimentally validated. The computer program is also developed according to this formulation, and the large deformation is analyzed for the unidirectional fiber reinforced composite material and the knitted fabric composite material.
• Effect of interphase properties on initial damage in embedded single fiber transverse tensile test

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Soc Mater Sci, Japan 48 (5) 446 - 453 0514-5163 1999 [Refereed]
   

  The embedded single fiber transverse tensile test has been proposed as a new experimental evaluation method on composite interfaces. The effect of surface treatment on microscopic damage, such as the interfacial debonding and matrix cracking around a fiber was investigated by in-situ SEM observation, when the transverse tensile load to the fiber longitudinal direction was applied to an embedded single fiber composite. The experimental result revealed that the surface treatment condition of fibers has an influence on the initiation and propagation of interfacial debonding and matrix cracking around a single fiber. In addition, the effect of interfacial properties on microscopic damage was investigated by a finite element analysis. The analysis was carried out by using a three layers model, which was modeled separately, fiber, matrix and interphase into the test specimen. The property for the interphase was assumed to be orthotropic, i.e. both tensile and shear moduli of the interphase are dealt independently to express the role of interphase for stress bearing and stress transfer separately. The effect of interphase properties was investigated by changing the tensile and shear moduli of the interphase. The reasonable elastic properties of the interphase were obtained by comparing the computational results with experimental ones. The Hoffman's failure criterion was used for judging of the damage in the interphase and the matrix. The validity of this analytical method is verified by comparing the analytical results with the experimental ones.
• Evaluation of damage behaviors on woven cloth fabric reinforced composites by in-situ SEM observation - effect of surface treatment

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Soc Mater Sci, Japan 48 (5) 430 - 437 0514-5163 1999 [Refereed]
   

  The effect of interfacial properties on damage behaviors of woven cloth fabric reinforced composites has been investigated by the edge cross-sectional observation of laminate under the tensile load in SEM. Test specimen used is vinyl ester resin matrix laminated composite reinforced by glass woven cloth. It is obvious that the surface treatment conditions of the fiber have affected the appearance of microscopic damages, such as the interfacial debonding and matrix cracking into the fiber bundle, or the generation of AE event. In the case of the fiber treated with the silane-coupling agent suitable for the matrix resin, only a few cracks occur into the fiber bundle just prior to the maximum load, and AE events generate fewer. In the case of chemical-mismatch treated fiber or non-treated fiber, however, much more cracks occur into the fiber bundle at the lower tensile load, but the generation behavior of AE events differs with each other. It is found by in-situ SEM observation that the fiber surface treatments have affected the initiation and progression of microscopic damage under the tensile load. Thus, it can be concluded that in-situ SEM observation with measuring both tensile load and AE event count is a useful evaluation method for understanding the effect of interfacial property on microscopic damage behavior.
• Estimation of Durability of GFRP Laminates under Stress-Corrosive Environments Using Acoustic Emission

  FUJII Yoshimichi; NISHIYABU Kazuaki

  Journal of the Japan Society for Composite Materials JAPAN SOCIETY FOR COMPOSITE MATERIALS 25 (3) 95 - 101 0385-2563 1999 [Refereed]
   

  The objective of this investigation is to estimate the creep life of glass fiber reinforced plastic (GFRP) under stress-corrosive environments using acoustic emission (AE). The laminates were fabricated using combinations of vinylester resin (R806) and random fiber mat or woven cloth. The creep tests were conducted in 5% nitric acid (HNO₃) environment. The AE depends on the loading level and the environment condition. For the creep test, the woven cloth reinforced specimens gave higher number of AE counts than the random mat reinforced specimens. The creep life decreased with increasing creep stress, whereas the rate of AE counts increased with increasing creep stress. A linear relationship was found between the creep life and the AE count rate. Using the proposed equation, a prediction of the creep life of GFRP under corrosive environments would presumably be possible.
• Effect of interphase properties on initial damage in embedded single fiber transverse tensile test

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Soc Mater Sci, Japan 48 (5) 446 - 453 0514-5163 1999 [Refereed]
   

  The embedded single fiber transverse tensile test has been proposed as a new experimental evaluation method on composite interfaces. The effect of surface treatment on microscopic damage, such as the interfacial debonding and matrix cracking around a fiber was investigated by in-situ SEM observation, when the transverse tensile load to the fiber longitudinal direction was applied to an embedded single fiber composite. The experimental result revealed that the surface treatment condition of fibers has an influence on the initiation and propagation of interfacial debonding and matrix cracking around a single fiber. In addition, the effect of interfacial properties on microscopic damage was investigated by a finite element analysis. The analysis was carried out by using a three layers model, which was modeled separately, fiber, matrix and interphase into the test specimen. The property for the interphase was assumed to be orthotropic, i.e. both tensile and shear moduli of the interphase are dealt independently to express the role of interphase for stress bearing and stress transfer separately. The effect of interphase properties was investigated by changing the tensile and shear moduli of the interphase. The reasonable elastic properties of the interphase were obtained by comparing the computational results with experimental ones. The Hoffman's failure criterion was used for judging of the damage in the interphase and the matrix. The validity of this analytical method is verified by comparing the analytical results with the experimental ones.
• Evaluation of damage behaviors on woven cloth fabric reinforced composites by in-situ SEM observation - effect of surface treatment

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Soc Mater Sci, Japan 48 (5) 430 - 437 0514-5163 1999 [Refereed]
   

  The effect of interfacial properties on damage behaviors of woven cloth fabric reinforced composites has been investigated by the edge cross-sectional observation of laminate under the tensile load in SEM. Test specimen used is vinyl ester resin matrix laminated composite reinforced by glass woven cloth. It is obvious that the surface treatment conditions of the fiber have affected the appearance of microscopic damages, such as the interfacial debonding and matrix cracking into the fiber bundle, or the generation of AE event. In the case of the fiber treated with the silane-coupling agent suitable for the matrix resin, only a few cracks occur into the fiber bundle just prior to the maximum load, and AE events generate fewer. In the case of chemical-mismatch treated fiber or non-treated fiber, however, much more cracks occur into the fiber bundle at the lower tensile load, but the generation behavior of AE events differs with each other. It is found by in-situ SEM observation that the fiber surface treatments have affected the initiation and progression of microscopic damage under the tensile load. Thus, it can be concluded that in-situ SEM observation with measuring both tensile load and AE event count is a useful evaluation method for understanding the effect of interfacial property on microscopic damage behavior.
• Estimation of Durability of GFRP Laminates under Stress-Corrosive Environments Using Acoustic Emission

  FUJII Yoshimichi; NISHIYABU Kazuaki

  Journal of the Japan Society for Composite Materials JAPAN SOCIETY FOR COMPOSITE MATERIALS 25 (3) 95 - 101 0385-2563 1999 [Refereed]
   

  The objective of this investigation is to estimate the creep life of glass fiber reinforced plastic (GFRP) under stress-corrosive environments using acoustic emission (AE). The laminates were fabricated using combinations of vinylester resin (R806) and random fiber mat or woven cloth. The creep tests were conducted in 5% nitric acid (HNO₃) environment. The AE depends on the loading level and the environment condition. For the creep test, the woven cloth reinforced specimens gave higher number of AE counts than the random mat reinforced specimens. The creep life decreased with increasing creep stress, whereas the rate of AE counts increased with increasing creep stress. A linear relationship was found between the creep life and the AE count rate. Using the proposed equation, a prediction of the creep life of GFRP under corrosive environments would presumably be possible.
• Evaluation of stress transfer mechanism in single fiber pull-out test by numerical analysis

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Soc Mater Sci, Japan 47 (6) 612 - 617 0514-5163 1998 [Refereed]
   

  The general aim of this study is to establish the modeling technique of interphase, which is the interfacial region between fiber and matrix, and to investigate the effects of interphase properties on the stress transfer mechanism and the fracture behavior in single fiber pull-out test. The finite element analytical model, which was divided independently with each element of fiber, matrix and interphase, has been applied. The interphase was assumed as orthotropy, because it can be dealt with the stress transfer and the stress bearing separately. The influence of interfacial shear stiffness on stress transmissibility was evaluated by the stress transferred from fiber to matrix by passing through the interphase. Also the effects of thermal stress which occurred at post-curing of resin, and meniscus which formed at the edge between fiber and matrix surface were investigated by FEM. From the analytical results, the following points were obtained (1) the interphase shearing modulus strongly affected the interfacial stress transmissibility, (2) the degree of stress concentration occurring at matrix surface was varied by interphase shear modulus, meniscus size and thermal stress, (3) the meniscus size largely affects both a success of pull-out testing and an appearance of the interfacial properties.
• In situ observation of micro damage under tensile load: Single fiber, fiber bundle & woven fabric

  K Nishiyabu; M Zako

  DESIGN AND MANUFACTURING OF COMPOSITES TECHNOMIC PUBL CO INC 141 - 148 1998 [Refereed]
   

  This study describes about how the fiber surface treatments are affected on both mesoscopic damages, such as interfacial debonding and matrix cracking in the embedded single fiber or strand, and macroscopic ones, such as inter-bundle delamination of woven fabric composites. The damage observations have been carried out under two types of tensile testing: (1) tensile test into scanning electron microscope (in situ SEM observation) and (2) universal tensile test (in situ macro observation). Test specimens are vinyl ester resin matrix embedded by single filament or strand, and reinforced by laminated woven cloth. In order to investigate the effects of interfacial properties, each specimen was fabricated using three types of surface treated fiber. It was obvious that the interfacial properties were able to be evaluated by in situ observation of each failure process, such as interfacial debonding, crack linking, and crack propagation. The effect of the fiber surface treatment on damages has been revealed in each scale level, i.e., filament, strand, and woven fabric.
• Assessment of the influence of interfacial properties on stress transfer in composites by a numerical approach

  K Nishiyabu; A Yokoyama; H Hamada

  COMPOSITES SCIENCE AND TECHNOLOGY ELSEVIER SCI LTD 57 (8) 1103 - 1111 0266-3538 1997 [Refereed]
   

  To investigate the effect of interfacial properties on stress transfer by a numerical approach, a finite element model has been used where the fiber, the matrix and the interphase were treated separately. When the interphase was assumed to be orthotropic, an influence of the interfacial shear stiffness on stress transfer was evaluated from the axial tensile stress transferred from the matrix to the fiber by passing through the interphase. The influence of fiber breakage and interfacial debonding or matrix cracking on the stress distribution has also been studied. When the shear stiffness of the interphase is greater than that of the matrix, a high stress concentration appears near the fiber break point. However this stress concentration disappears when the fiber breakage occurs together with interfacial debonding or matrix cracking. If was therefore suggested that the fiber fracture propagation mode might be changed by altering the shear stiffness of the interphase and by the existence of interfacial debonding or matrix cracking. Thus it was obvious that the proposed FE numerical approach and the concept of material constants of the composite interphase might be appropriate for investigating the influence of the interfacial properties on stress transfer. (C) 1997 Elsevier Science Limited.
• Effect of graded interphase properties on stress transfer mechanisms in single fiber composite

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 46 (4) 335 - 342 0514-5163 1997 [Refereed]
   

  In order to investigate the effect of the interfacial property on stress transmissibility, the finite element analytical model in which fiber, matrix and interphase were divided independently into mesh elements has been applied. The interfacial region was assumed as orthotropy. The concept of orthotropy on the composite interphase is suitable for investigating the effects of stress bearing and stress transfer on mechanical behaviors. This paper deals with the study on the influence of the gradient interphase on the stress transfer. Either the axial tensile modulus or the shear modulus was varied gradually in the interphase. From the analytical results, it is concluded that the difference in gradient distribution of the interfacial tensile modulus or the interfacial shear modulus affected both the interfacial stress transmissibility and stress bearing in the interphase. Therefore, it is obvious that this numerical analytical modelling on composite interface is suitable for the numerical approach of fiber reinforced composites, because it is possible to represent separately stress transfer and stress bearing as the role of the interface/interphase.
• Assessment of the influence of interfacial properties on stress transfer in composites by a numerical approach

  K Nishiyabu; A Yokoyama; H Hamada

  COMPOSITES SCIENCE AND TECHNOLOGY ELSEVIER SCI LTD 57 (8) 1103 - 1111 0266-3538 1997 [Refereed]
   

  To investigate the effect of interfacial properties on stress transfer by a numerical approach, a finite element model has been used where the fiber, the matrix and the interphase were treated separately. When the interphase was assumed to be orthotropic, an influence of the interfacial shear stiffness on stress transfer was evaluated from the axial tensile stress transferred from the matrix to the fiber by passing through the interphase. The influence of fiber breakage and interfacial debonding or matrix cracking on the stress distribution has also been studied. When the shear stiffness of the interphase is greater than that of the matrix, a high stress concentration appears near the fiber break point. However this stress concentration disappears when the fiber breakage occurs together with interfacial debonding or matrix cracking. If was therefore suggested that the fiber fracture propagation mode might be changed by altering the shear stiffness of the interphase and by the existence of interfacial debonding or matrix cracking. Thus it was obvious that the proposed FE numerical approach and the concept of material constants of the composite interphase might be appropriate for investigating the influence of the interfacial properties on stress transfer. (C) 1997 Elsevier Science Limited.
• Effect of graded interphase properties on stress transfer mechanisms in single fiber composite

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako

  Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 46 (4) 335 - 342 0514-5163 1997 [Refereed]
   

  In order to investigate the effect of the interfacial property on stress transmissibility, the finite element analytical model in which fiber, matrix and interphase were divided independently into mesh elements has been applied. The interfacial region was assumed as orthotropy. The concept of orthotropy on the composite interphase is suitable for investigating the effects of stress bearing and stress transfer on mechanical behaviors. This paper deals with the study on the influence of the gradient interphase on the stress transfer. Either the axial tensile modulus or the shear modulus was varied gradually in the interphase. From the analytical results, it is concluded that the difference in gradient distribution of the interfacial tensile modulus or the interfacial shear modulus affected both the interfacial stress transmissibility and stress bearing in the interphase. Therefore, it is obvious that this numerical analytical modelling on composite interface is suitable for the numerical approach of fiber reinforced composites, because it is possible to represent separately stress transfer and stress bearing as the role of the interface/interphase.

Books etc

• Handbook of metal injection molding

  NISHIYABU Kazuaki (Joint workPowder space holder metal injection molding (PSH-MIM) of micro-porous metals)Woodhead Publishing 2012/06
• Some Critical Issues for Injection Molding

  NISHIYABU Kazuaki (Joint workMicro Metal Powder Injection Molding)InTech 2012/03
• Recent Development in Research of Macro- and Nanoporous Metals

  中嶋英雄 (Contributor金属粉末射出成形によるマイクロポーラス金属精密部品の製造法)シーエムシー出版 2010/07
• ｢工業材料｣2005年10月号，特集：傾斜機能材料－その魅力と応用事例

  西藪和明 (Joint workマイクロ多孔質構造が段階的に変化する傾斜機能多層金属の開発)日刊工業新聞社 2005/10 48-52頁 

  Vol.53 No.10
• マイクロリアクタテクノロジー ～限りない可能性と課題～

  西籔和明 (Joint work金属粉末射出成形技術を用いたマイクロリアクタの製造)エヌ・ティー・エス 2005/07

Conference Activities & Talks

• 電気抵抗式融着によるCF/PPS積層板の接合挙動に及ぼす影響因子  [Not invited]

  田邉大貴; 倉敷哲生; 傳谷真司; 西籔和明

  日本複合材料合同会議(CD-ROM)  2013
• 電気抵抗式融着による熱可塑性CFRP板の接合挙動  [Not invited]

  田邉大貴; 傳谷真司; 西籔和明; 倉敷哲生

  日本繊維機械学会年次大会研究発表論文集・講演要旨集  2013
• Alシート/熱可塑性CFRPハイブリッド積層板の熱変形挙動  [Not invited]

  森椙哲也; 服部佑紀; 西籔和明

  日本複合材料合同会議(CD-ROM)  2013
• ESナノファイバーインプリント樹脂型ナノ粉末印刷によるマイクロ構造体の作製  [Not invited]

  桜井晋也; JUSOH Mohd; Ikhwan Helmi; 西籔和明

  日本複合材料合同会議(CD-ROM)  2013
• 形状記憶合金ワイヤを用いた熱可塑性CFRP板の作製とその形状回復挙動  [Not invited]

  田渕喜瑛; 西籔和明; 田邉大貴; 倉敷哲生

  日本複合材料合同会議(CD-ROM)  2013
• Fabrication and Thermal Conductivity of Diamond Particle Added Nano-Copper Powder Sintered Parts  [Not invited]

  鹿子 泰宏; 西籔 和明; 田邉 大貴; 田中 茂雄

  日本機械学会第18回機械材料・材料加工技術講演会（M&P2010）  2011/11  東京大学  日本機械学会第18回機械材料・材料加工技術講演会（M&P2010）
   

  本研究は，焼結性が高く，寸法精度や表面粗度に優れたナノサイズの純銅粉末にダイヤモンド粒子を添加し，ダイヤモンドの熱劣化温度以下での焼結を試み，焼結体の熱伝導性を調査した．また，著者らがこれまでに金属粉末射出成形（Metal Injection Molding，MIM）技術を応用し，研究開発してきた微細な三次元構造体を製造するマイクロ犠牲樹脂型インサートMIM（Micro Sacrificial Plastic Mold Insert MIM，μ-SPiMIM）に銅/ダイヤモンド複合材を適用し，微細なピラー構造を有するマイクロヒートシンクの製造可能性を調査した．
• ナノ銅粉末を用いたマイクロ高機能化プロセッシングの挑戦  [Not invited]

  西籔 和明

  (社)粉体粉末冶金協会，第22回 射出成形技術・評価研究会  2011/11  京都  (社)粉体粉末冶金協会，第22回 射出成形技術・評価研究会
   

  本講演では，ナノ銅粉末を用いた2つの先進的な製造法の開発についての取り組みを紹介する．１つは，ナノ銅粉末を用いたナノインプリント犠牲樹脂型インサートMIMによるマイクロ構造体の作製法であり，その脱脂･焼結過程について詳説する．もう１つは，超高性能マイクロヒートシンクの量産化を目的に開発したマイクロ犠牲樹脂型インサートMIMによる柱状構造を有するダイヤモンド粒子添加銅焼結体の作製法である．
• Metal Injection Moulding Process for Copper / Diamond Composites with High Thermal Conductivity by Using Nanopowder  [Not invited]

  西籔 和明; 鹿子 泰宏; 田邉 大貴; 田中 茂雄

  PM2010 WORLD CONGRESS  2011/10  イタリア  PM2010 WORLD CONGRESS
   

  本研究は，ナノサイズの純銅粉末にダイヤモンド粒子を添加し，ダイヤモンドの熱劣化温度以下での焼結を試み，焼結体の熱伝導性を調査するとともに，マイクロ犠牲樹脂型インサート金属粉末射出成形（?-SPiMIM）プロセスを用いて，銅/ダイヤモンド複合材のマイクロヒートシンクの製造可能性を調査した結果について発表した．(英文)
• 軟磁性粉末射出成形体の充填密度に及ぼす材料および射出成形条件の影響  [Not invited]

  増永賢司; 西籔和明; 森本純司; 橋本知久; 田中茂雄

  日本機械学会年次大会講演論文集  2011/09
• ナノ銅粉末を用いたナノインプリント樹脂型インサートMIMによるマイクロ構造体の製造法  [Not invited]

  西籔和明; 田邉大貴; 鹿子泰宏; 田中茂雄

  日本機械学会年次大会講演論文集  2011/09
• 織物強化熱可塑性複合材料の片持ち曲げ変形に及ぼす繊維配向角と温度負荷の影響  [Not invited]

  吉澤賢宏; 田邉大貴; 西籔和明; 倉敷哲生

  日本機械学会年次大会講演論文集  2011/09
• 犠牲樹脂型インサート金属粉末射出成形によるインプリント用スタンパーの開発  [Not invited]

  大久保健児; 田中茂雄; 伊藤浩志; 西籔和明

  日本機械学会年次大会講演論文集  2011/09
• Report on "JSMS COMPOSITES Young Researcher Symposium, 2011"  [Not invited]

  NISHIYABU Kazuaki

  Journal of the Society of Materials Science, Japan  2011
• Report on "JSMS COMPOSITES Young Researcher Symposium, 2010"  [Not invited]

  KURASHIKI Tetsusei; NISHIYABU Kazuaki

  Journal of the Society of Materials Science, Japan  2011
• 335 Fabrication and Thermal Conductivity of Diamond Particle Added Nano-Copper Powder Sintered Parts  [Not invited]

  KANOKO Yasuhiro; TANAKA Shigeo; TANABE Daiki; NISHIYABU Kazuaki

  Materials and processing conference  2010/11 

  This study aims to develop the MIM process for manufacturing the micro heat sinks made of copper / diamond composites with high thermal conductivity. Diamond particles were added into the feedstock composed of copper powder and polyathetal-based binder. The compound feedstock was molded into sacrificial plastic mold (SP-mold), and the green compacts with micro-pillars were obtained and removed the SP-mold by solvent extraction. Nano-sized copper powder was used for drastically decreasing the sintering temperature to prevent from occurring thermal damages on the surfaces of diamond particles. The sintered parts were also prepared by spark plasma sintering in contrast with furnace sintering, and they were evaluated by density and thermal conductivity measurements. The experimental results showed that using nanopowder could obtain a sufficient high sintered density under low sintering temperature.
• Micro Metal Injection Moulding by NIL Lost Form Technology and Using Nanopowder  [Not invited]

  西籔 和明; 田邉 大貴; 鹿子 泰宏; 田中 茂雄

  PM2010 WORLD CONGRESS  2010/10  イタリア  PM2010 WORLD CONGRESS
   

  本研究は，ナノサイズの純銅粉末を，ナノインプリントリソグラフィにより製造した犠牲樹脂型に射出成形し脱脂・焼結工程を経て精密なマイクロ構造体を得るNIL/μ-SPiMIMプロセスに適用し，射出成形条件および脱脂･焼結工程の最適条件の検討を行い，マイクロ構造体の製造の可能性を調査した結果について発表した．(英文)
• Fabrication and Thermal Properties of Diamond Particle Added Nano-Copper Powder Sintered Parts  [Not invited]

  西籔 和明; 田邉 大貴; 鹿子 泰宏; 田中 茂雄

  日本材料学会複合材料部門委員会2010年度JCOM若手シンポジウム  2010/08  兵庫県豊岡市城崎町湯島1062  日本材料学会複合材料部門委員会2010年度JCOM若手シンポジウム
   

  本研究では，焼結性が高く，寸法精度や表面粗さに優れたナノサイズの純銅粉末にダイヤモンド粒子を添加し，ダイヤモンドの熱劣化温度以下での焼結を試み，焼結体の熱伝導性を調査した．加えて，著者らが金属粉末射出成形（Metal Injection Molding，MIM）技術を応用し開発した，微細な三次元構造体が製造可能なマイクロ犠牲樹脂型インサートMIM（Micro Sacrificial Plastic Mold Insert MIM，μ-SPiMIM）に銅/ダイヤモンド複合材を適用し，微細なピラー構造を有するマイクロヒートシンクの製造可能性を調査した．
• Evaluation of Anisotropic Behavior in Bending Deformation of CFRP Laminates Under Concentrated Load  [Not invited]

  西籔 和明; 尾原 礼俊

  日本材料学会複合材料部門委員会2010年度JCOM若手シンポジウム  2010/08  兵庫県豊岡市城崎町湯島1062  日本材料学会複合材料部門委員会2010年度JCOM若手シンポジウム
   

  本研究は，これまで荷重下での一方向強化複合材料の弾性変形に対する計測および解析の精度に関して検証した報告はあまり見受けられないため，基礎研究に立ち帰り，繊維配向角の異なる一方向炭素繊維強化プラスチックに集中荷重を作用させた際に生じる片持ち曲げ変形挙動を接触式の三次元座標測定，非接触式の三次元変形解析システムを用いた実験および有限要素解析から調査した．また，実験および解析の結果を検証し計測精度を調査した．
• S0402-1-3 Fabrication and Thermal Conductivity of Diamond Particle Added Nano-Copper Powder Sintered Parts

  KANOKO Yasuhiro; TANAKA Shigeo; TANABE Daiki; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2010  The Japan Society of Mechanical Engineers
   

  This study aims to develop the MIM process for manufacturing the micro heat sinks made of copper / diamond composites with high thermal conductivity. Diamond particles were added into the feedstock composed of copper powder and polyathetal-based binder. The compound feedstock was molded into sacrificial plastic mold (SP-mold), and the green compacts with micro-pillars were obtained and removed the SP-mold by solvent extraction. Nano-sized copper powder was used for drastically decreasing the sintering temperature to prevent from occurring thermal damages on the surfaces of diamond particles. The sintered parts were also prepared by spark plasma sintering in contrast with furnace sintering, and they were evaluated by density and thermal conductivity measurements. The experimental results showed that using nanopowder could obtain a sufficient high sintered density under low sintering temperature.
• S0402-1-2 Debinding-Sintering Process of Micro-Structured Parts by Nanoimprint Sacrificial Plastic Mold Insert MIM using Nano-sized Copper Powder

  TANABE Daiki; NISHIYABU Kazuaki; KANOKO Yasuhiro; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2010  The Japan Society of Mechanical Engineers
   

  This study aims to reveal debinding-sintering process of the micro-structured parts by the metal powder injection molding (MIM) inserted sacrificial plastic molds which were prepared by thermal nanoimprint lithography (NIL). The microscopic transcriptional property in molded and sintered parts was evaluated by cross-sectional SEM observation. The experimental results revealed reasonable evidences that using nanopowder could sinter at very low temperature with keeping the fine shapes. It can be concluded that the manufacturing method of NIL/μ-SPiMIM has great potential to produce precisely metallic parts with a single-digit micrometered structures.
• SUS316Lの脱バ・焼結過程に生じる諸現象  [Not invited]

  岩津 修; 西籔 和明; 田中 茂雄; 豊島 孝文

  粉体粉末冶金協会 射出成形技術・評価研究会  2010  粉体粉末冶金協会 射出成形技術・評価研究会
  
• 407 Study on Electro-Fusion Joining Property of Cross-Linked Polyethylene Pipes  [Not invited]

  MUTO Masahiro; NISHIYABU Kazuaki; WATANABE Takashi

  Materials and processing conference  2009/11
• 216 Evaluation on Anisotropic Behavior in Bending Deformation of CFRP Laminates Under Concentrated Load  [Not invited]

  OHARA Ayatoshi; NAKAO Yuki; NISHIYABU Kazuaki

  Materials and processing conference  2009/11
• W0401(3) Recent Advance in Micro Metal Powder Injection Molding

  NISHIYABU Kazuaki

  The Reference Collection of Annual Meeting  2009  The Japan Society of Mechanical Engineers
  
• S0403-1-4 Fabrication of Micro Porous Structured Parts by Nanoimprint Sacrificial Plastic Mold Insert MIM

  NISHIYABU Kazuaki; TANABE Daiki; KANOKO Yasuhiro; Tanaka Shigeo

  The proceedings of the JSME annual meeting  2009  The Japan Society of Mechanical Engineers
   

  This study aims to develop the manufacturing method for micro-structured parts with sub-micron porous structure. MIM feedstock composed of nano-sized copper powder and polymeric binder was injection-molded into micro-sacrificial plastic mold (SP-mold) which was prepared by nano-imprint lithography (NIL) technique, and sintered at low temperature followed by solvent debinding of the SP-mold. It was shown from trial study that the micro-structured parts with sub-micron porous structure could be precisely obtained by the process named NIL/μ-SPiMIM developed in this study.
• 粉末成形の基礎と素材製造プロセス 3．金属粉末射出成形の最近の進歩  [Not invited]

  西籔和明

  日本材料学会｢材料｣  2009
• 1519 Inner local stress analysis of micro-parts made of porous titanium

  TAKANO Naoki; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2008  The Japan Society of Mechanical Engineers
   

  One of the authors has developed a novel manufacturing method of micro mechanical parts made of porous metals named powder space holder metal injection molding (SPH-MIM). This study presents an original numerical analysis of inner local stress considering the microstructure architecture by the finite element mesh superposition method, which aims at proposing the strength evaluation and design methodology for those micro parts. Fracture test, digital image-based measurement of macroscopic surface strain distribution and numerical results are presented in this paper.
• Small is better if testing MIM nano theories  [Not invited]

  西籔和明; 田中茂雄

  Metal Powder Report  2008
• W01(10) Feasibility Study on Micro and High Functional Processings by Metal Powder Injection Molding  [Not invited]

  NISHIYABU Kazuaki

  年次大会講演資料集  2007/09 

  The possibility of micro and high functional processings by metal powder injection molding (MIM) which uses effectively polymeric materials for enhancing both mold-ability and shape-retention were introduced. Sacrificial plastic mold inserted metal injection molding (SPiMIM) was developed to overcome some problems facing the realization of μ-MIM process. The molds were manufactured by LIGA process. Two types of transcription methods were adopted in LIGA/μ-SPiMIM process to obtain the sintered parts with multi pillars or fluidic channels. The effects of particle size on the quality of micro-structured parts were also investigated.
• 0948 Development of a Device Observing the Insertion of Microneedles into Cultured Skin

  UEMURA Takeshi; TAKANO Naoki; MIYANO Takaya; OKANISHI Takaaki; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
   

  This paper describes a hybrid evaluation technique of mechanical characteristics for the insertion of microneedles into cultured skin. The developed device applies uniform tension to cultured skin, the value of which is calculated by large deformation and viscoelastic finite element analysis. It has been confirmed that the microneedle made of polyethyleneglycol was saccessfuly inserted into cultured skin.
• 2745 Mechanical Properties of SiC Fiber Reinforced SiC Composites Fabricated by Polymer Impregnation and Pyrolysis Process Combined with Powder Space Holder Technique

  KOTANI Masaki; ZIMMER Aline; MATSUZAKI Satoru; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
   

  As a promising approach to improve a matrix microstructure of SiC/SiC composite, the polymer impregnation and pyrolysis process combined with powder space holder technique (PSH-PIP) has been developed. PSH method was employed for making porous structure which potentially contributes to efficient gas purge and uniform shrinkage during pyrolysis. Under the best matrix producing condition which had been found through monolith productions, unidirectional SiC/SiC composites were successfully fabricated. By comparing them with a conventionally-fabricated composite, the matrix formation of improved homogeneity with smaller amount of process defects was certainly approved. The effectiveness of the microstructural improvement on mechanical properties was explicitly demonstrated as expected.
• 2563 Development of SiC Fiber Reinforced Micro-Porous SiC Heat-Resistant Composites by Polymer Impregnation and Pyrolysis Method

  NISHIYABU Kazuaki; MATSUZAKI Satoru; KOTANI Masaki

  The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
   

  This study aims to develop the heat-resistant composite materials with high reliability in strength. The adoption of powder space holder (PSH) method into polymer impregnation and pyrolysis (PIP) process was proposed to reduce predominant defects formed in the firing process of SiC precursor polymer. The effects of size and fraction of space holding particle made of polymethylmethacrylate on the pore formation behavior were mainly investigated. Consequently, SiC porous materials and the fibrous composite materials with homogeneous open porous structure were successfully obtained without significant defects. This is surely due to an efficient gas purge and a stable shrinkage by introducing the porous structure in SiC matrix.
• 2562 Evaluation on Functional Properties of Micro Porous Metal Components Manufactured by Powder Space Holder Method

  MATSUZAKI Satoru; TANAKA Shigeo; NISHIYABU Kazuaki; OCHI Toshiaki

  The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
   

  This study aims to evaluate the functional properties such as heat radiation performance and water absorption power of micro-porous metals produced by powder space holder method To investigate the effects of pore size on heat radiation performance, the heat transfer coefficients of micro-porous copper specimens were measured under various air flow rates. Also, to know the water absorption behavior of micro-porous metals, the weight change of porous stainless-steel specimens in a water immersion was evaluated.
• 5142 Fabrication and Quality Evaluation of Micro-gear by Metal Powder Injection Molding

  MORIMOTO Kei; NISHIYABU Kazuaki; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  This study describes the methodology on fabrication and quality evaluation of me micro-gear manufactured by metal powder injection molding (MIM). Cross-sections of the gear teeth are observed with a digital microscope and dimensions of teethes were measured by an image analysis. The variation in dimensions of teethes in a piece of micro-gear and between micro-gears was compared. It was shown that those experiments contribute useful information on the quality of the micro gear.
• 2916 Surface Treatment Process for High Functionality of Metal Injection Molding

  YAMAGAMI Takanobu; NISHIYABU Kazuaki; OSADA Toshiko; TANAKA Shigeo; MIURA Hideshi

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  The general aim of this study is to develop the surface functionalization process in metal powder injection molding (MIM). A gas nitriding process which can improve the wear and corrosion resistances was investigated for sintered Ti and its alloy parts through the MIM process to realize the high functionality at low processing cost. The effects of the specimen size and the process conditions on the nitriding reaction in the Ti-6Al-4V MIM parts were mainly investigated by micro-structural observation and hardness measurements. The gas nitriding mechanisms were discussed. The results suggested that the gas nitriding process was a useful surface treatment process for high functionality of micro metal injection molding (μ-MIM) products.
• 3018 Evaluation on Sliding Wear of Stainless Steels Produced by Metal Powder Injection Molding

  NISHIYABU Kazuaki; KAMEO Koji; FRIEDRICH Klaus; TANIMOTO Toshio; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  The wear resistance of stainless steel parts, which were fabricated by a metal injection molding (MIM) process, was studied under self-mating, dry sliding conditions, using a pin-on-disk type wear configuration. The materials used were an austenitic stainless steel 316L (of MIM and wrought steel), a precipitated stainless steel 17-4PH (of MIM and wrought steel), and a widely used ball-bearing steel (DIN 100Cr6). Two surface conditions, i.e. as sintered and as polished, were considered in the wear tests of the MIM samples. In summary, the wear resistance of 316L was lower than 17-4PH, and the latter was almost the same as 100Cr6. Further, the wrought materials showed a better wear resistance than the MIM materials. The mechanisms responsible for these tendencies were discussed by means of microscopical observations and chemical inspections of the worn surfaces and the microstructures of the samples.
• 2917 Quality Improvement in LIGA/Micro Sacrificial Plastic Mold Insert Metal Injection Molding

  NISHIYABU Kazuaki; KANOKO Yasuhiro; Tanaka Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  The aim of this study is to improve the quality of micro-structured parts manufactured by Micro Sacrificial Plastic Mold Inserted Metal Powder Injection Molding (μ-SPiMIM) process using LIGA. The defects in plastic injection molding such as weld-line and short filling, which developed around micro pillar structures of plastic molds, were evaluated with a laser microscope observation. The effects of molding conditions on the quality in micro injection molding of micro plastic parts were discussed. The effects of molding conditions in metal powder injection molding were also investigated.
• 2758 Fabrication and Evaluation of Micro Porous Metal Components by Powder Space Holder Method

  NISHIYABU Kazuaki; HIRAO Hiroshi; MATSUZAKI Satoru; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  A novel production method for the metal components with micro-sized porous structures has been developed by applying powder space holder (PSH) method to metal powder injection molding (MIM) process. This method is capable of manufacturing with high dimensional accuracy the micro-porous metal components with complicated shapes using most kinds of metal powder. The size of metal powder and space holding particle in addition to sintered temperature are main factors affecting significantly for the pore size, porosity, surface area and shrinkage of sintered porous metals. The method proposed is useful in producing the graded porous structure for high functionally.
• 2728 Development of Silicon Carbide Heat Resistant Composites by Powder Space Holder Method

  FUTAHASHI Yuki; NISHIYABU Kazuaki; MATSUZAKI Satoru; TANAKA Shigeo; KOTANI Masaki

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  This study aims to develop a heat-resistant composite material with high safety and reliability towards realization of re-use type space transportation system. Silicon carbide (SiC) which has high thermal conductivity and chemical inactive was adopted. To modify the brittleness of SiC, the micro-porous materials were produced by powder space holder (PSH) method. The production conditions of SiC porous materials and SiC fiber reinforced SiC porous composite material were considered. The problems of the heating process of SiC precursor polymer were solved by changing the particle size and the mixture ratio of pore formation materials. Consequently, SiC porous materials without crack with homogeneous open porous structure were obtained.
• 2759 Analysis of Sintering Shrinkage in Micro Porous Metals Produced by Powder Space Holder Method

  HIRAO Hiroshi; NISHIYABU Kazuaki; SHINAGAWA Kazunari; MATSUZAKI Satoru; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  A novel production method for the metal components has been developed by applying powder space holder (PSH) method to metal injection molding (MIM) process. Micro porous metals which have controlled closed or open pore structures are produced by PSH-MIM method. It is important for producing the products with high-quality to understand the effects of material combination and sintering temperature on pore size and porosity. The aim of this study is to investigate the effectiveness of the numerical analysis for their prediction. The analytical results showed the similar tendency to the experimental ones on sintering shrinkage of porous metals prepared using various volume fractions of space holding particle.
• 2722 Micro Metal Injection Molding Using Hybrid Micro/Nano Powder

  KAKISHITA Kenichi; NISHIYABU Kazuaki; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
   

  Micro metal powder injection molding (μ-MIM) needs more sophisticated techniques than the conventional MIM. The use of finer powders is one of solutions to improve the dimensional accuracy and surface roughness of sintered products. This study aims to investigate the effectiveness of nano powder in μ-MIM process. To produce the tiny specimens with high trial efficiency and a small amount of feedstock, a novel experimental machine which can achieve to mold without pelletizing was used. Minute pattern specimens were produced with changing the binder content and the size of copper powder. The effects of particle size of metal powder on the tap density, melt viscosity, and surface roughness, microstructure of sintered parts were discussed.
• 2203 High Functionality of Titanium Powder Injection Molding by Nitriding

  OSADA Toshiko; MIURA Hideshi; TAKEMASU Teruie; UEMURA Makoto; NISHIYABU Kazuaki; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2005  The Japan Society of Mechanical Engineers
   

  In this study, gas nitriding was processed for various sizes of Titanium parts which were produced by metal injection molding (MIM) process, for the sake of enabling the high functionality at low processing cost. It was shown from the experiments that nitriding treatment resulted in increasing hardness on the surface and the microstructure changed to the TiN and acicular α-Ti phase. To effect on the size of parts, micro dumbbell specimen had around five times higher content of nitrogen than block ones. It is concluded that the size of μ-MIM products is so small that surface treatment can contribute significantly to improve the properties, and then gas nitriding process is one of effective surface treatment methods for high functionality of μ-MIM products.
• 2204 A Fundamental Study on Micro/Nano Hybrid Powders Based Micro Powder Injection Molding

  NISHIYABU Kazuaki; KAKISHITA Kenichi; OSADA Toshiko; MATSUZAKI Satoru; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2005  The Japan Society of Mechanical Engineers
   

  Micro powder injection molding (μ-PIM) needs more sophisticated techniques than the conventional PIM The use of finer powders is one of solutions to improve the dimensional accuracy and surface roughness of sintered products. This study aims to investigate the effects of hybrid micro/nano powders on feedstock properties in μ-PIM process. To produce the tiny specimens with high trial efficiency and a small amount of feedstock, a novel experimental machine which can achieve to mold without pelletizing was used. Small dumbbell specimens were produced with changing the binder content and the fraction of nano-scale copper powder. The effects of nano-scale copper powder addition on the tap density of mixed powder, the viscosity of feedstock and microstructure of sintered bodies were discussed.
• 2202 Micro Plastic Sacrificial Mold Insert Metal Injection Molding (μ-SPiMIM) Method

  TAIRA Kensuke; TANAKA Shigeo; NISHIYABU Kazuaki; KANOKO Yasuhiro

  The proceedings of the JSME annual meeting  2005  The Japan Society of Mechanical Engineers
   

  The μ-MIM process using the sacrificial plastic mould (SP-mould), namely micro sacrificial plastic mould insert metal injection molding (μ-SPiMIM) method has been developed to solve the above-mentioned problems specific to μ-MIM, and to be freed from ordinary constraints of shapes. The SP-moulds are prepared by three types of methods; 1) machining, 2) LIGA process and 3) rapid prototyping for zigzag-shaped spring, multi-pillar and micro-impeller, respectively. This study aims to demonstrate the possibility of μ-SPiMIM process for producing the tiny and micro-structured parts, and to show the characteristics in production method of SP mould for μ-SPiMIM process.
• 2201 Processing Techniques to Improve Dimensional Accuracy of Micro-MIM Products

  OKUBO Kenji; TANAKA Shigeo; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2005  The Japan Society of Mechanical Engineers
   

  This study aims to develop processing techniques to improve dimensional accuracy of tiny parts produced by micro metal injection molding (μ-MIM). Micro dumbbell specimens were molded by a micro injection molding machine, which can be monitored with the mold pressure in injection process measured at the both side chucking portions. The effects of particle size distribution of stainless steel powders on the mold pressure and dimension in green compacts and sintered bodies were investigated. The reduction of the difference in dimension of chucking parts of micro dumbbell specimens to 5μm was achieved by using the powder undercut below 5μm in particle diameter.
• 金属粉末射出成形のマイクロ化への挑戦  [Not invited]

  田中茂雄; 西籔和明

  日本塑性加工学会誌｢塑性と加工｣  2005
• Fabrication of Micro Porous Metal Parts by Powder Space Holder Method

  NISHIYABU Kazuaki; MATSUZAKI Satoru; ISHIDA Masashi; TANAKA Shigeo

  The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
   

  The production method for metal parts with micro sized porous structure has been developed by applying "powder space-holder method" in metal powder injection molding process. In addition to metal powder and thermoplastic binders, coarse spherical material made of thermoplastic was used as lost material for formation of fine porous structures. The specimens were made by extrusion and injection moldings. The difference in these molding methods on the porous structure and those mechanical properties were investigated. It was shown that the porosity and strengths were controllable by changing the volume fraction of space holding particles. If was also demonstrated that the complicated shaped metal parts with micro porous structures can be produced using various kinds of metal powders by using metal injection or extrusion molding methods.
• Optimization of Molding Conditions for Improvement in Dimensional Accuracy of Micro Metal Injection Molded Parts

  OKUBO Kenji; TANAKA Shigo; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
   

  Micro Metal injection molding (μ-MIM) is one of premising processes to manufacture tiny metal parts. Micro dumbbell specimens were molded by a micro injection molding machine, the mold pressure in injection process was measured at the both side chucking portions, and the effects of injection volume on the mold pressure and dimension in green compacts and sintered bodies were investigated. Dimension of molded parts and sintered ones were correlated by injection volume and then the possibility for dimensional control by the mold pressure was shown. It was also confirmed that the micro injection machine has some advantages for producing μ-MIM products.
• Development of Small Mixing and Injection Molding Machine for Micro Powder Injection Moldings

  YUZUKI Akio; OSADA Toshiko; TANAKA Shigeo; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
   

  In order to improve the variation in quality of tiny parts produced by micro Powder Injection Molding (μ-PIM) and to study the effects of compounding ratio and additives with a minute amount of materials, a new concept of small mixing and injection molding machine has been developed. This machine enabled to mix metal powder and binders followed by injection molding, therefore it can achieve to mold without pelletizing process, namely "pellet-less" injection molding. It has a small furnace to mix and plasticization when injection molding, plunger which works as a screw during mixmg and also plunger for injection molding. As a trial mixing and molding, it is confirmed that the pellet would be homogeneous in a certain mixing condition and the variation in density of micro dumbbell specimen was slight.
• Investigation on Fabrication of Micro Structures by Metal Injection Molding with LIGA Process

  MATSUZAKI Satoru; TANAKA Shigeo; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
   

  This study aims to investigate the possibility for producing microstructure metal parts by applying micro metal injection molding (μ-MIM) in molding process of LIGA. The micro insert MIM methods based on LIGA process were proposed, and used two types of sacrificial molds for MIM as following; 1) PMMA resist and 2) PMMA mold injected in Ni electroformed mold. These processes named "LIGA/μ-iMIM" and were realized using SUS316L stainless steels. It was demonstrated that LIGA/μ-iMM method actually had a great potential to produce microstructure parts, and it was also confirmed that finer powder was better for their transcription.
• Numerical and Experimental Analysis of Filling Behaviors in Micro Metal Injection Molding

  TAIRA Kensuke; OKUBO Kenji; TANAKA Shigeo; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
   

  This paper describes the designing techniques for mold in micro metal injection molding, namely μ-MIM. The aim of this study is to investigate the possibility of filling analysis in MIM with commercial-based fluid analytical software for plastic injection molding. The filling length in bar-flow mold of polypropylene was compared the experimental results to analytical ones with variable injection conditions. The filling pattern and inside pressure in the micro dumbbell mold of MIM was also compared in order to investigate the differences between the experimental results and analytical ones.
• Examples of Non-contact Strain Field Measurement by Advanced Digital Images Correlation Technique  [Not invited]

  Nishiyabu Kazuaki; Akabane Takahiko; Nonaka Hiroshi

  Symposium on Evaluation and Diagnosis  2003/12
• マイクロ金属粉末射出成形に適した金型技術の開発  [Not invited]

  西籔和明; 長田俊子; 西上信哉; 柚木明生; 田中茂雄; 松崎 覚; 大久保健児; 平 健輔

  金型技術振興財団 金型に関する研究助成者研究発表会資料  2003/07
• Fabrication and Mechanical Properties of Micro Parts by Metal Injection Molding

  OSADA Toshiko; NISHIYABU Kazuaki; MATSUZAKI Satoru; TANAKA Shigeo; MIURA Hideshi

  The proceedings of the JSME annual meeting  2003  The Japan Society of Mechanical Engineers
   

  This study describes the micro evaluation methods for investigating the feedstock and component properties and the process conditions for industrial mass production of micro components by Metal Injection Molding (μ-MIM). The effects of feedstock properties such as particle size and powder loading on the sintered properties of micro-dumbbell specimens were investigated under various injection-molding and sintering conditions. Small particle size and high powder loading significantly improved the quality such as density, dimensional accuracy and tensile strength, as well as yield percentage in producing non-defective micro-dumbbell sintered specimens. The surface condition of setting plate in debinding and sintering process influenced on the microstructure of the sintered specimens, i.e. slip-band appeared at only centered narrow segments. Deformation and fracture propagation behaviors were observed with the in-situ SEM tensile test which were useful to comprehend the influences of feedstock quality on the mechanical properties of the μ-MIM products.
• Image-based Strain Measurement for Textile Composites under Closed Molding

  TAKANO Naoki; ZAKO Masaru; FUJITSU Reiko; NISHIYABU Kazuaki

  The proceedings of the JSME annual meeting  2002  The Japan Society of Mechanical Engineers
   

  To evaluate the moldability and performance of complicated shaped components of textile composites, it is essential to know the large deformation of the textile preform. In this study, a digital image-based strain measurement system is proposed to measure the distribution of large strain in the closed molding based on the theory of continuum mechanics. The Biot's strain is adopted to exclude the misestimation due to the rotational motion during the closed molding. It is calculated with the image capturing and digitization procedures. This report demonstrates the effectiveness of the newly developed method through the application to rib-knitted fabric thermoplastic composites.
• 成形シミュレーション  [Not invited]

  西籔和明; 仲井朝美; 横山敦士; 濱田泰以

  日本複合材料学会誌  2001
• Computational and Experimental Anaylysis of Microscopic Large Deformation of Knitted Fabric Composite Material (jointly worked)  [Not invited]

  The 6th Japan International SAMPE Symposium & Exibition  1999
• Micro Damage Behaviors of Woven Fabric Reinforced Composites with Varied Interfacial Property (jointly worked)  [Not invited]

  Interfacial Phenomena in Composite Materials '99(IPCM '99)  1999
• Effect of Surface Treatment on the GFRP at the Environmental Creep Conditions(3) (jointly worked)  [Not invited]

  The 7th International Conference on Composite Interfaces(ICCI-(]G0007[))  1998
• Evaluation of Interfacial Property by Embedded Single Strand Transverse Tensile Test (jointly worked)  [Not invited]

  The 4th International Symposium for Textile Composites(TEXCOMP-4)  1998
• Fracture Behavior of Concrete Beam Strength with Composite Materials (jointly worked)  [Not invited]

  The 1st Asian-Australasian Conference on Composite Materials(ACCM-1)  1998
• An Investigation on Micro Damage Behaviors of Woven Fabric Composites with Different Interfacial Property by Experimental and Numerical Analysis (jointly worked)  [Not invited]

  The 4th International Symposium for Textile Composites(TEXCOMP-4)  1998
• Damage Behaviors of Woven Fabric Composites with Different Interfacial Property (jointly worked)  [Not invited]

  The 1st Asian-Australasian Conference on Composite Materials(ACCM-1)  1998
• In Situ SEM Observation of Micro Damages under Tensile Load (jointly worked)  [Not invited]

  The 7th International Conference on Composite Interfaces(ICCI-(]G0007[))  1998
• Effect of Interphase Properties on Initial Damage in Single Fiber Composites under Transverse Tensile Load (jointly worked)  [Not invited]

  The 7th International Conference on Composite Interfaces(ICCI-(]G0007[))  1998
• Effects of Interphase Properties on Microscopic Damage in Embedded Single Fiber Transverse Tensile Test (jointly worked)  [Not invited]

  The 5th Japan International SAMPE Symposium & Exibition  1997
• Effect of Interphase Parameters on Stress Distribution in Single Fiber Composites (jointly worked)  [Not invited]

  Interfacial Phenomena in Composite Materials '97(IPCM '97)  1997
• Numerical Approach for Evaluation of Stress Transmissibility on Composite Interface  [Not invited]

  NISHIYABU Kazuaki; YOKOYAMA Atsushi; HAMADA Hiroyuki

  日本複合材料学会研究発表講演会予稿集  1996/05
• Assessment of Influence of Interfacial Properties on Stress Transmissibility in Composite by Numerical Approach (jointly worked)  [Not invited]

  The 6th International Conference on Composite Interfaces(ICCI-(]G0006[))  1996
• Deepdrawing of Knitted Fabric Reinforced Thermoplastic Sheet  [Not invited]

  The 4th Japan International SAMPE Symposium & Exibition  1995

MISC

• Report on “Industrial CFRP Workshop 2022” as Special Event of JSMS Committee on Composite Materials

  NISHIYABU Kazuaki  Journal of the Society of Materials Science, Japan  72-  (9)  695  2023/09
• Evaluation on Joining Strength and Damage Behavior in Unidirectional CF/PEEK Rivet Using Near-infrared Ring Heater and Servo-press Unit

  江口剛志; 伊藤幹尚; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Effects of CNT Added Woven-CF Heating Element on Resistance Welding Behavior of CF/PPS Laminates

  田邉大貴; 高橋省吾; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Evaluation on Servo-Press Thermoforming and Damage Behavior of UD-CF/PEEK Rivet Head under Tensile Loading

  伊藤幹尚; 江口剛志; 森本郁哉; 池田大佳; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Evaluation on Ultrasonic Welding Behavior of CF/PPS Laminates and Health Monitoring Using CNT Added Energy Director

  西村壮真; 田邉大貴; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Evaluation on Joining Behavior of UD-CF/Epoxy Laminates and Aluminum Plate Using Ultrasonic Heating

  裏野葵生; 田邉大貴; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Transverse Compressive Properties of UD-CF/PEEK Rods Prepared by Prepreg Tape Pultrusion Process

  只野弥緒葉; 大利哲平; 榎晋佑; 江口剛志; 西籔和明  日本複合材料合同会議(Web)  14th-  2023
• Joining of CFRTP and Metal

  Tanabe Daiki; Nishiyabu Kazuaki  Seikei-Kakou  34-  (2)  51  -55  2022/01
• Effects of Micro and Nano Fiber Added Resistance Heating Element on Resistance Welding Behavior of Woven-CF/PPS Laminates

  田邉大貴; 竹澤明日也; 西籔和明  日本複合材料合同会議(Web)  13th-  2022
• Effect of Energy Director on Joining Behavior of Unidirectional CF/Ep Laminates and Al Plate using Ultrasonic Heating

  裏野葵生; 田邉大貴; 西籔和明  日本複合材料合同会議(Web)  13th-  2022
• Suppression of overheating and thermal behavior on laminate surface in high-frequency induction welding of woven CF/PPS composite

  長谷川晴海; 田邉大貴; 西籔和明  日本複合材料合同会議(Web)  13th-  2022
• Ultrasonic Welding Behavior of Woven-CF/PPS by using Micro/Nano-sized Fibers Added Energy Director

  西村壮真; 田邉大貴; 西籔和明  日本複合材料合同会議(Web)  13th-  2022
• Effect of micro/nano-sized particles in welding layer on welding behavior of CFRTP

  田邉大貴; 谷悠希; 早稲田一嘉; 西籔和明  日本材料学会学術講演会講演論文集(CD-ROM)  70th-  2021
• 熱硬化性から熱可塑性CFRPへ : 量産化のための異材接合技術—特集 異種材料の溶接・接合技術

  西籔 和明  溶接技術 = Welding technology : 一般社団法人日本溶接協会誌  68-  (5)  54  -61  2020/05
• 熱可塑性CFRPの量産化のための最新の製造技術—Latest Manufacturing Technologies for Mass Production of Carbon Fiber Reinforced Thermoplastic Composites

  西籔 和明  科学と工業 = Science and industry / 科学と工業編集委員会 編  93-  (5)  129  -136  2019/05
• Evaluation of Continuous Welding Behavior of CFRTP Using High-Frequency Induction Heating

  栗間一輝; 長谷川晴海; 田邉大貴; 西籔和明  日本機械学会機械材料・材料加工技術講演会論文集(CD-ROM)  27th-  2019
• 炭素繊維をエネルギーダイレクタに用いた織物CF/PPS積層板の超音波スポット融着挙動に及ぼす影響因子

  堀内睦之; 田邉大貴; 西籔和明  日本繊維機械学会年次大会研究発表論文集・講演要旨集  72nd-  2019
• Evaluation of Spot Welding Behavior of CF/PPS Laminates using Ultrasonic Heating

  TANABE Daiki; HORIUCHI Tokiyuki; NISHIYABU Kazuaki  The Proceedings of the Materials and processing conference  2019.27-  122  2019
• Evaluation method for tensile shear strength of woven CF/PA66 hybrid specimen manufactured by hybrid injection molding

  MATSUMOTO Fumiya; TANABE Daiki; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2019-  J04410P  2019
• On Ultra-compact Gear Manufactured by Micro Metal Powder Injection Molding

  NISHIYABU Kazuaki; TANAKA Shigeo  The Proceedings of Mechanical Engineering Congress, Japan  2019-  F11103  2019
• Dissimilar Material Resistance Welding of Thermoplastic CFRP and CFRTP using Phenoxy Polymer for Welding Layer

  JISAKA Keisuke; TNABE Daiki; TAMURA Kouta; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2019-  J04415P  2019
• Effects of insulating layer of resistance heating element on resistance welding behavior of woven-CF/PPS laminates

  TAMURA Kota; JISAKA Keisuke; TANABE Daiki; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2019-  J04432P  2019
• Evaluation and Manufacturing of Unidirectional CF/PA6 rod using Pultrusion Molding

  ANDO Naoto; TANABE Daiki; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2019-  J04407P  2019
• Effects of Resistance Heating Element on Joining Strength of CF/PPS Composites

  田邉 大貴; 西籔 和明  Proceedings of 22nd International Conference on Composite Materials 2019  1115-4-  2019
• Induction Welding Behavior of Woven CF/PPS Laminates Using High Frequency Continuous Induction Heating

  田邉 大貴; 西籔 和明  Proceedings of 22nd International Conference on Composite Materials 2019  5214-2-  2019
• 熱可塑性CFRPの抵抗融着接合挙動に及ぼす炭素繊維抵抗発熱体の影響

  田邉 大貴; 西籔 和明  第10回 日本複合材料会議(JCCM-10)講演論文集  2019-  2019
• Effects of Processing Parameters on Ultrasonic Spot Welding of Woven CF/PPS Laminates using Carbon Fiber Energy Director

  HORIUCHI Tokiyuki; TANABE Daiki; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2019-  J04416P  2019
• Ultrasonic Spot Welding Behavior of Woven-CF/PPS Laminates using CF/PPS Energy Director

  田邉 大貴; 西籔 和明  Proceedings of 22nd International Conference on Composite Materials 2019  --  1215  -1  2019
• 熱可塑性CFRPの普及に向けた課題・欧州の技術動向と開発事例

  西籔 和明  Material stage / 技術情報協会 編  18-  (5)  1  -6  2018/08
• CFRP量産成形研究の最前線 インダストリアルCFRPの用途拡大に向けた最新の技術動向と製造技術

  西籔和明  ぷらすとす  1-  (7)  493‐497  2018/07
• Cutting Edge of Molding Techniques of Composite Materials I: Latest Manufacturing Cases and Researches of Carbon Fiber Reinforced Thermoplastics in Europe

  西籔和明; 田邉大貴  材料  67-  (6)  653‐659(J‐STAGE)  -659  2018/06
• Latest Trends in Manufacturing Technologies for Expanding Applications of Industrial CFRP

  NISHIYABU Kazuaki  PLASTOS  1-  (7)  493  -497  2018
• 産学官連携を活かした金型・成形技術の高度化と人材育成 Part1:研究機関が実施する技術開発・人材育成支援〈事例4〉近大発・大阪東部地域連携における先進的な金型技術の高度化研究プロジェクト

  西籔和明  型技術  32-  (11)  036‐039  -26  2017/10
• 湿式圧縮成形による炭素繊維熱可塑性エポキシ樹脂積層板の作製

  嶋田翔太; 田邉大貴; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2017-  ROMBUNNO.J0440305  2017/09
• 電気式融着接合した織物CF/PPS積層板の引張せん断強度に及ぼす影響因子

  窪堀文夫; 田邉大貴; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2017-  ROMBUNNO.J0440204  2017/09
• 近赤外線加熱を用いた熱可塑性CFRPプリプレグテープの自動積層成形

  田邉大貴; 中田直樹; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2017-  ROMBUNNO.J0440304  2017/09
• 次世代繊維~セルロースナノファイバーから人工クモ糸まで~熱可塑性CFRPとマルチマテリアル化の最新技術動向

  西籔和明  化学経済  64-  (8)  36‐42  -29  2017/07
• 部品軽量化のための金型・成形技術と材料技術 インダストリアルCFRPの最新技術動向―異なるものとのつながりの重要性―

  西籔和明  型技術  32-  (7)  022‐026  -26  2017/06
• Evaluation on Oxidative Degradation Behavior in Hot-Pressing of Woven CF/PPS Laminates

  Tsuyoshi NAKAMOTO; Daisuke KANEUCHI; Daiki TANABE; Kazuaki NISHIYABU  日本機械学会第24回機械材料・材料加工技術講演会（M&P2016）講演論文集  114-  2016/11
• Hot Press Molding and Mechanical Properties Evaluation of Carbon Fiber Reinforced Phenoxy Resin Composite Materials

  Shota Shimada; Daiki Tanabe; Kazuaki Nishiyabu  日本機械学会第24回機械材料・材料加工技術講演会（M&P2016）講演論文集  113-  2016/11
• ハイブリッド射出成形により作製された熱可塑性CFRPの接合強度特性評価

  松村亮太; 田邉大貴; 田邉大貴; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2016-  ROMBUNNO.J0450104  2016/09
• 熱可塑性CFRP積層板の電気式融着接合に及ぼす炭素繊維抵抗発熱体の影響

  田邉大貴; 田邉大貴; 窪堀文夫; 西籔和明; 倉敷哲生  日本機械学会年次大会講演論文集(CD-ROM)  2016-  ROMBUNNO.J0450202  2016/09
• 高周波誘導加熱コイルを用いた熱可塑性CFRP積層板の連続融着接合

  Daiki Tanabe; Yusuke Kawamura; Kazuaki Nishiyabu; Tetsusei Kurashiki  日本機械学会 2016年度 年次大会講演論文集(CD-ROM)  J0450301-  2016/09
• Fusion Joining Behavior of Carbon Fiber Reinforced Thermoplastic Electro Fusion Pipe Joint using Carbon Fiber Heating Element

  高橋真人; 嶋田翔太; 田邉大貴; 西籔和明  日本機械学会 2016年度 年次大会講演論文集(CD-ROM)  J0450303-  2016/09
• Effects of fiber reinforcement pattern on high frequency induction heating behavior of unidirectional and woven CFRTP laminates

  Daiki Tanabe; Kai Kurauchi; Kazuaki Nishiyabu; Tetsusei Kurashiki  Zairyo/Journal of the Society of Materials Science, Japan  65-  (8)  611  -617  2016/08
• 近赤外線および高周波誘導ロール加熱による熱可塑性CFRPテープ多層連続積層成形

  田邉大貴; 田邉大貴; JIANG Hongfei; 西籔和明; 倉敷哲生  日本機械学会年次大会講演論文集(CD-ROM)  2016-  2016
• Continuous tape layup molding of CFRTP using near-infrared heating and high frequency induction roller heating

  D. Tanabe; F. Kubohori; S. Imamura; H. Jiang; K. Nishiyabu; T. Kurashiki  ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials  2016/01
• Resistance welding of carbon fiber reinforced thermoplastic composites using spread carbon fiber heating element

  D. Tanabe; F. Kubohori; K. Nishiyabu; T. Kurashiki  ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials  2016/01
• Effects of heating conditions on high frequency induction welding behavior of carbon fiber reinforced thermoplastic composites

  D. Tanabe; K. Kurauchi; Y. Kawamura; K. Nishiyabu; T. Kurashiki  ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials  2016/01
• 320 Development of Small Manufacturing Machine for Carbon Fiber Reinforced Thermoplastic Composites by Hot-press Molding

  TAMAGAWA Yutaro; NISHIYABU Kazuaki  Materials and processing conference  2015-  (23)  "320  -1"-"320-5"  2015/11
• J0450102 Fusion Behavior on Continuous Laying of Unidirectional CFRTP Prepreg Tape Using Multiple Heating Sources

  TANABE Daiki; IMAMURA Shota; NISHIYABU Kazuaki; KURASHIKI Tetsusei  Mechanical Engineering Congress, Japan  2015-  "J0450102  -1"-"J0450102-5"  2015/09
• J0450105 Fabrication of Thermoplastic CFRP Shock Absorber by Hot Pressing-Injection Hybrid Molding

  NISHIMUKAI Koji; TANABE Daiki; Daiki Kazuaki  Mechanical Engineering Congress, Japan  2015-  "J0450105  -1"-"J0450105-5"  2015/09
• 熱可塑性CFRP積層板の高周波誘導融着接合における加熱条件の影響

  田邉大貴; 倉内海; 西籔和明; 倉敷哲生  日本機械学会 2015年度年次大会 講演論文集  J0450302-  2015/09
• 熱可塑性CFRPにおける金型・成形技術の開発動向 研究事例 3 熱可塑性CFRPの量産・再利用のための型技術

  NISHIYABU KAZUAKI; TANABE DAIKI  型技術  30-  (5)  032  -036  2015/05
• 熱可塑性CFRPの量産・再利用のための型技術 (特集 熱可塑性CFRPにおける金型・成形技術の開発動向)

  西籔 和明; 田邉 大貴  型技術  30-  (5)  32  -36  2015/05
• Effects of processing conditions in unidirectional carbon fiber thermoplastic tape laying

  D. Tanabe; K. Nishiyabu; T. Kurashiki  ICCM International Conferences on Composite Materials  2015-July-  2015/01
• Fabrication of ES-nanofiber imprinting plastic mold and micro-structured parts by nanopowder printing

  Kazuaki Nishiyabu  ICCM International Conferences on Composite Materials  2015-July-  2015/01
• Fabrication of micro-structured parts by nanopowder printing using ES-nanofiber imprinting plastic mold

  NISHIYABU Kazuaki; KAWAKAMI Jiro  Transactions of the JSME (in Japanese)  81-  (829)  14  -00604-14-00604  2015
• Fabrication of micro-structured parts by nanopowder printing using ES-nanofiber imprinting plastic mold

  NISHIYABU Kazuaki; KAWAKAMI Jiro  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  0-  (0)  2015
• Effects of processing parameters on electro-fusion joining of CF/PPS composites using carbon fiber heating elements

  TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  81-  (826)  15  -00005-15-00005  2015
• Effects of processing parameters on electro-fusion joining of CF/PPS composites using carbon fiber heating elements

  TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  0-  (0)  2015
• Replication of micro-structured imprint plastic mold via electro-spinning nanofiber process

  NISHIYABU Kazuaki; KAWAKAMI Jiro  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  81-  (824)  14  -00571-14-00571  2015
• Replication of micro-structured imprint plastic mold via electro-spinning nanofiber process

  NISHIYABU Kazuaki; KAWAKAMI Jiro  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  0-  (0)  2015
• Improvement in matrix microstructure of SiC/SiC composites by incorporation of pore-forming powder

  Masaki Kotani; Aline Zimmer; Satoru Matsuzaki; Kazuaki Nishiyabu; Shigeo Tanaka  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN  122-  (1430)  863  -869  2014/10
• J0460102 Electro-Fusion Joining of Carbon Fiber Reinforced Thermoplastic Composites by Carbon Fiber Heating Element Added High Thermal Conducting Particle

  TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  Mechanical Engineering Congress, Japan  2014-  "J0460102  -1"-"J0460102-5"  2014/09
• J0460103 Fabrication of Injection Molded Part using Recycled Carbon Fiber Reinforced Thermoplastics and Geometry Measurement by Three Dimensional Digitizer

  KURATOME Kyosuke; TANABE Daiki; NISHIYABU Kazuaki  Mechanical Engineering Congress, Japan  2014-  "J0460103  -1"-"J0460103-4"  2014/09
• フェムト秒レーザーによる微細周期構造のナノインプリント法への応用

  OTSUKA MASATAKA; SOMEKAWA TOSHIHIRO; KAWAKAMI JIRO; NISHIYABU KAZUAKI; MAEDA YOSHINOBU; MATSUTANI TAKAOMI; FUJITA MASAYUKI; MIYANAGA NORIAKI  応用物理学会秋季学術講演会講演予稿集(CD-ROM)  75th-  ROMBUNNO.17A-S9-5  2014/09
• グリーンマシニングと焼結接合による製造した金属粉末射出成形品の形状評価

  SAKURAI SHIN'YA; NISHIYABU KAZUAKI; TANAKA SHIGEO  精密工学会関西地方定期学術講演会講演論文集  2014-  50  -51  2014/07
• グリーンマシニングと焼結接合による複雑形状MIM部品の寸法変化

  桜井晋也; 田中茂雄; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2014-  2014
• Optimum parameters on electro fusion joining of CF/PPS composites by carbon fiber heating elements

  D. Tanabe; K. Nishiyabu; T. Kurashiki  Proceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting  2014/01
• Dimensional change of complex shape MIM parts fabricated by green machining and sintered joining

  Shinya Sakurai; Kazuaki Nishiyabu; Shigeo Tanaka  Euro PM 2014 Congress and Exhibition, Proceedings  2014/01
• Electro fusion joining of carbon fiber reinforced thermoplastic composites using carbon fiber heating element

  D. Tanabe; K. Nishiyabu; T. Kurashiki  16th European Conference on Composite Materials, ECCM 2014  2014/01
• 半導体レーザによる熱可塑性CFRPの融着挙動に関する評価

  YAMAKAWA MASAFUMI; NAKAMOTO TSUYOSHI; TANABE DAIKI; NISHIYABU KAZUAKI  複合材料シンポジウム講演要旨集  39th-  173  -174  2014
• Effects of fiber reinforcing configuration on oxidation and melting phenomenon of CF/PPS laminated composites by electrically-conducting

  Daiki Tanabe; Kazuaki Nishiyabu; Tetsusei Kurashiki  Zairyo/Journal of the Society of Materials Science, Japan  63-  (5)  368  -373  2014
• Electro-fusion behavior of CF/PPS laminates using Ni-Cr wire resistance heating element

  TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A  80-  (815)  189  -SMM0189  2014
• 通電加熱による形状記憶合金ワイヤ/熱可塑性CFRPハイブリッド積層板の変形挙動

  田邉大貴; 石丸拓弥; 倉敷哲生; 西籔和明  日本複合材料合同会議(CD-ROM)  5th-  ROMBUNNO.3C-08  2014
• 熱可塑性CFRP積層板の電気式融着における炭素繊維発熱体の形態と融着条件の影響

  田邉大貴; 森脇悠介; 西籔和明; 倉敷哲生  日本複合材料合同会議(CD-ROM)  5th-  ROMBUNNO.2C-07  2014
• Effects of Processing Parameters on Electro-fusion Joining of CF/PPS Composites using Carbon Fiber Heating Elements

  田邉 大貴; 森脇 悠介; 西籔 和明  機械材料・材料加工技術講演会 M&P  21-  (21)  "113  -1"-"113-5"  2013/11
• Al/熱可塑性CFRPハイブリッド積層板の熱変形挙動の評価

  森椙哲也; 松倉拓也; 西籔和明  日本機械学会年次大会講演論文集(CD-ROM)  2013-  2013
• J045064 Thermal Deformation Behavior of Shape Memory Alloy Wire / Carbon Fiber Reinforced Thermoplastic Composites

  ISHIMARU Takuya; TANABE Daiki; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _J045064  -1-_J045064-5  2013
• J046013 Fusion Bonding of Carbon Fiber Reinforced Thermoplastic Composites by Electrofusion method

  TANABE Daiki; MORIWAKI Yusuke; NISHIYABU Kazuaki; KURASHIKI Tetsusei  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _J046013  -1-_J046013-5  2013
• J112011 Fabrication of Micro-structured Imprint Plastic Mold via ES-nanofiber Process

  SAKURAI Shinya; KAWAKAMI Jiro; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _J112011  -1-_J112011-5  2013
• 113 Effects of Processing Parameters on Electro-fusion Joining of CF/PPS Composites using Carbon Fiber Heating Elements

  TANABE Daiki; MORIWAKI Yusuke; NISHIYABU Kazuaki; KURASHIKI Tetsusei  The Proceedings of the Materials and processing conference  2013-  (0)  _113  -1_-_113-5_  2013
• J046031 Evaluation on Thermal Deformation Behavior of AI/Thermoplastic CFRP Hybrid laminates

  MORISUGI Tetsuya; MATSUKURA Takuya; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _J046031  -1-_J046031-5  2013
• Effects of processing parameters on electro-fusion joining behavior of CF/PPS composites

  D. Tanabe; S. Tsutaya; K. Nishiyabu; T. Kurashiki  ICCM International Conferences on Composite Materials  2013-July-  3722  -3731  2013/01
• J046014 Punching Behavior of Carbon Fiber Reinforced Thermoplastic Laminated Composites

  NAKANISHI Keita; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _J046014  -1-_J046014-5  2013
• S041011 Fabrication of Micro-structured Parts by Nano-powder Printing using ES-nanofiber Imprinting Mold

  SAKURAI Shinya; KAWAKAMI Jiro; NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2013-  (0)  _S041011  -1-_S041011-5  2013
• Deformation behavior of shape-memory alloy wire/carbon fiber reinforced thermoplastic composites

  Y. Tabuchi; T. Morisugi; D. Tanabe; K. Nishiyabu  8th Asian-Australasian Conference on Composite Materials 2012, ACCM 2012 - Composites: Enabling Tomorrow's Industry Today  2-  1473  -1478  2012/12
• Fusion behavior of continuous fiber reinforced thermoplastic composites in electro-fusion welding

  D. Tanabe; S. Tsutaya; K. Nishiyabu; T. Kurashiki  8th Asian-Australasian Conference on Composite Materials 2012, ACCM 2012 - Composites: Enabling Tomorrow's Industry Today  2-  1560  -1565  2012/12
• S041013 Filling behavior and magnetic properties of Fe-45Ni Permalloy MIM parts

  NISHIYABU Kazuaki; OKUBO Kenji; TANAKA Shigeo  Mechanical Engineering Congress, Japan  2012-  "S041013  -1"-"S041013-5"  2012/09
• Powder space holder metal injection molding (PSH-MIM) of micro-porous metals

  K. Nishiyabu  Handbook of Metal Injection Molding  349  -390  2012/06
• デジタル画像計測による複雑形状を有するMIM焼結部品の変形解析

  西籔和明; 長井孝太郎; 大久保健児; 田中茂雄  日本機械学会年次大会講演論文集(CD-ROM)  2012-  2012
• Deformation analysis of complex shaped Ti-MIM parts by digital image measurement

  Kazuaki Nishiyabu; Kenji Okubo; Shigeo Tanaka  Proceedings of the International Euro Powder Metallurgy Congress and Exhibition, Euro PM 2012  3-  2012/01
• Filling behaviour and magnetic properties of Fe-45Ni Permalloy micro-MIM parts

  Kazuaki Nishiyabu; Kenji Okubo; Shigeo Tanaka  Proceedings of the International Euro Powder Metallurgy Congress and Exhibition, Euro PM 2012  3-  2012/01
• J164021 Preparation of Micro-structured Parts by ES-nanofiber Imprint Plastic Mold Insert MIM

  NISHIYABU Kazuaki; Mohd Ikhwan  The Proceedings of Mechanical Engineering Congress, Japan  2012-  (0)  _J164021  -1-_J164021-5  2012
• J043042 Fusion Behavior of Carbon Fiber Reinforced Thermoplastic Composites in Electro-fusion Welding

  TANABE Daiki; TSUTAYA Shinji; NISHIYABU Kazuaki; KURASHIKI Tetsusei  The Proceedings of Mechanical Engineering Congress, Japan  2012-  (0)  _J043042  -1-_J043042-5  2012
• J043021 Hot Press Molding and Deformation Behavior of Shape-Memory Alloy Wire / Carbon Fiber Reinforced Thermoplastic Composites

  TABUCHI Yoshiaki; TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  The Proceedings of Mechanical Engineering Congress, Japan  2012-  (0)  _J043021  -1-_J043021-5  2012
• Report on "jSMS COMPOSITES Young Researcher Symposium, 2011"

  Kazuaki Nishiyabu  Zairyo/Journal of the Society of Materials Science, Japan  60-  (12)  1156  2011/12
• Anisotropic behavior in bending deformation of CF/EPOXY and CF/PPS laminates under concentrated and thermal load

  K. Nishiyabu; T. Yoshizawa; D. Tanabe; T. Kurashiki  ICCM International Conferences on Composite Materials  2011/12
• J111033 Manufacturing Method of Micro-Structured Parts by Nanoimprint Plastic Mold Insert MIM using Nano-sized Copper Powder

  NISHIYABU Kazuaki; TANABE Daiki; KANOKO Yasuhiro; TANAKA Shigeo  Mechanical Engineering Congress, Japan  2011-  "J111033  -1"-"J111033-5"  2011/09
• S041021 Effects of Feedstock and Molding Conditions on Density of Soft Magnetic Powder Injection Molded Parts

  MASUNAGA Kenji; NISHIYABU Kazuaki; MORIMOTO Jyunji; HASHIMOTO Tomohisa; TANAKA Shigeo  Mechanical Engineering Congress, Japan  2011-  "S041021  -1"-"S041021-5"  2011/09
• S041022 Development of Stamper for Imprinting by Sacrificial Plastic Mold Inserted Metal Injection Molding

  OKUBO Kenji; TANAKA Shigeo; ITO Hiroshi; NISHIYABU Kazuaki  Mechanical Engineering Congress, Japan  2011-  "S041022  -1"-"S041022-5"  2011/09
• J043021Effects of Fiber Orientation Angle and Temperature Load on Bending Deformation of Woven Fabric Reinforced Thermoplastic Composites

  YOSHIZAWA Takahiro; TANABE Daiki; NISHIYABU Kazuaki; KURASHIKI Tetsusei  Mechanical Engineering Congress, Japan  2011-  (0)  "J043021  -1"-"J043021-4"  2011/09
• Processing of polymer-derived porous SiC body using allylhydridopolycarbosilane (AHPCS) and PMMA microbeads

  Masaki Kotani; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN  119-  (1391)  563  -569  2011/07
• Report on "JSMS composites young researcher symposium, 2010"

  Tetsusei Kurashiki; Kazuaki Nishiyabu  Zairyo/Journal of the Society of Materials Science, Japan  60-  (3)  273  2011/03
• Manufacturing of 316L stamper for imprinting by micro sacrificial plastic mould inserted MIM

  Kenji Okubo; Shigeo Tanaka; Hiroshi Ito; Kazuaki Nishiyabu  Proceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2011  2-  2011/01
• Diamond additionsdon't guaranteebetter heat sinks

  Kazuaki Nishiyabu; Yasuhiro Kanoko; Daiki Tanabe; Shigeo Tanaka  Metal Powder Report  66-  (2)  27  -32  2011
• 335 Fabrication and Thermal Conductivity of Diamond Particle Added Nano-Copper Powder Sintered Parts

  KANOKO Yasuhiro; TANAKA Shigeo; TANABE Daiki; NISHIYABU Kazuaki  Materials and processing conference  2010-  (18)  "335  -1"-"335-5"  2010/11
• S0402-1-2 Debinding-Sintering Process of Micro-Structured Parts by Nanoimprint Sacrificial Plastic Mold Insert MIM using Nano-sized Copper Powder

  TANABE Daiki; NISHIYABU Kazuaki; KANOKO Yasuhiro; TANAKA Shigeo  The proceedings of the JSME annual meeting  1-  329  -330  2010/09
• 世界の一歩先へ進む金属粉末射出成形(MIM)のマイクロ化と最新の製造技術 (特集 逆境に克つ! ニッポンの成形技術)

  西籔 和明; 鹿子 泰宏; 田中 茂雄  型技術  25-  (3)  33  -39  2010/03
• Structural strength prediction for porous titanium based on micro-stress concentration by micro-CT image-based multiscale simulation

  Naoki Takano; Ken Fukasawa; Kazuaki Nishiyabu  INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES  52-  (2)  229  -235  2010/02
• LIGA犠牲樹脂型インサート金属粉末射出成形によるマイクロ構造体の製造

  西籔 和明  日本機械学会論文集 A編、第75巻、第760号  1719  -1725  2010  [Refereed]
  
• Effect of micro/nano powder ratio on the properties of copper sintered parts produced by metal injection molding

  Kazuaki Nishiyabu; Kenichi Kakishita; Shigeo Tanaka  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A  76-  (767)  996  -1001  2010
• Metal injection moulding process for copper/diamond composites with high thermal conductivity by using nanopowder

  Kazuaki Nishiyabu; Yasuhiro Kanoko; Daiki Tanabe; Shigeo Tanaka  Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010  4-  2010/01
• Micro metal injection moulding by NIL lost form technology and using nanopowder

  Kazuaki Nishiyabu; Daiki Tanabe; Yasuhiro Kanoko; Shigeo Tanaka  Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010  1-  2010/01
• Effect of Tension and Curvature of Skin on Insertion Characteristics of Microneedle Array

  TACHIKAWA Hiroto; TAKANO Naoki; NISHIYABU Kazuaki; MIKI Norihisa; AMI Yoshimichi  Journal of Solid Mechanics and Materials Engineering  4-  (3)  470  -480  2010
• A case study on computational fluid dynamics analysis of Micro-MIM products

  Andrews Ian; Nishiyabu Kazuaki; Tanaka Shigeo  Bulletin of Osaka Prefectural College of Technology  43-  29  -40  2009/12
• 117 Evaluation on Debinding Behavior in Metal Powder Molded Processes

  TOYOSHIMA Takafumi; NISHIYABU Kazuaki; IWATSU Osamu; TANAKA Shigeo  Materials and processing conference  2009-  (17)  "117  -1"-"117-2"  2009/11
• 338 Study on Mechanical Design Methodology for Porous Titanium Parts based on Internal Micro Stress

  Fukasawa Ken; Takano Naoki; Nishiyabu Kazuaki; Kawasaki Yusuke  Materials and processing conference  2009-  (17)  "338  -1"-"338-2"  2009/11
• 535 Fabrication of Micro-structured Parts by Nano-Imprint Lithography Sacrificial Plastic Mold Insert MIM using Nano-sized Powder

  TANABE Daiki; NISHIYABU Kazuaki; KANOKO Yasuhiro; TANAKA Shigeo  Materials and processing conference  2009-  (17)  "535  -1"-"535-2"  2009/11
• 216 Evaluation on Anisotropic Behavior in Bending Deformation of CFRP Laminates Under Concentrated Load

  OHARA Ayatoshi; NAKAO Yuki; NISHIYABU Kazuaki  Materials and processing conference  2009-  (17)  "216  -1"-"216-2"  2009/11
• 407 Study on Electro-Fusion Joining Property of Cross-Linked Polyethylene Pipes

  MUTO Masahiro; NISHIYABU Kazuaki; WATANABE Takashi  Materials and processing conference  2009-  (17)  "407  -1"-"407-2"  2009/11
• M1-2 Fabrication of Micro-structured Parts by Nano-Imprint Lithography Sacrificial Plastic Mold Insert MIM using Nano-sized Powder (M1 Fabrication Technology and NEMS/MEMS Material)

  NISHIYABU Kazuaki; TANABE Daiki; KANOKO Yasuhiro; TANAKA Shigeo  マイクロ・ナノ工学シンポジウム  2009-  (1)  17  -18  2009/10
• S0403-1-4 Fabrication of Micro Porous Structured Parts by Nanoimprint Sacrificial Plastic Mold Insert MIM

  NISHIYABU Kazuaki; TANABE Daiki; KANOKO Yasuhiro; Tanaka Shigeo  The proceedings of the JSME annual meeting  1-  285  -286  2009/09
• 6・2・5 粉末加工(6・2 材料加工,6.機械材料・材料加工,<特集>機械工学年鑑)

  西籔 和明  日本機械学會誌  112-  (1089)  630  -630  2009/08
• OS1007 Development of Mechanical Characterization System in Sticking Cultured Skin with Micro-Needles

  TACHIKAWA Hiroto; TAKANO Naoki; MIYANO Takaya; NISHIYABU Kazuaki; KAWASAKI Yusuke  M&M材料力学カンファレンス  2009-  639  -640  2009/07
• OS0619 Strength Prediction of Porous Titanium Parts based on Microscopic Stress using Finite Element Mesh Superposition Method

  FUKASAWA Ken; TAKANO Naoki; NISHIYABU Kazuaki; KAWASAKI Yusuke  M&M材料力学カンファレンス  2009-  239  -240  2009/07
• OS0621 Case Studies on Non-contact Strain Field Measurement of Composite Materials by Advanced Digital Images Correlation Technique

  NISHIYABU Kazuaki; KAWASAKI Yusuke  M&M材料力学カンファレンス  2009-  244  -245  2009/07
• Microstress-based strength prediction for porous titanium parts by finite element mesh superposition method

  高野 直樹; 西籔 和明; 川崎 雄介  Proceedings of the conference on computational engineering and science  14-  (2)  1039  -1042  2009/05
• Accuracy evaluation on SUS ultra-compact module 0.07mm gears manufactured by MIM

  Kazuaki Nishiyabu; Shigeo Tanaka  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  56-  (5)  268  -273  2009/05
• マイクロ金属粉末射出成形の最新の技術動向

  西藪和明  機講論  9-  259  -260  2009
• III : Recent Advance in Metal Powder Injection Molding

  NISHIYABU Kazuaki  journal of the Japan Society for Testing Materials  58-  (1)  87  -92  2009
• Basics of powder compaction and material processing III: Recent advance in metal powder injection molding

  Kazuaki Nishiyabu  Zairyo/Journal of the Society of Materials Science, Japan  58-  (1)  87  -92  2009/01
• POLYMER IMPREGNATION AND PYROLYSIS PROCESS COMBINED WITH POWDER SPACE HOLDER TECHNIQUE (PSH-PIP)

  Masaki Kotani; Aline Zimmer; Satoru Matsuzaki; Kazuaki Nishiyabu  ADVANCED PROCESSING AND MANUFACTURING TECHNOLOGIES FOR STRUCTURAL AND MULTIFUNCTIONAL MATERIALS II  29-  (9)  27  -+  2009
• Manufacturing of micro-structured parts by LIGA sacrificial plastic mold insert metal injection molding

  Kazuaki Nishiyabu; Yasuhiro Kanoko; Shigeo Tanaka  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A  75-  (760)  1719  -1725  2009
• POLYMER IMPREGNATION AND PYROLYSIS PROCESS COMBINED WITH POWDER SPACE HOLDER TECHNIQUE (PSH-PIP)

  Masaki Kotani; Aline Zimmer; Satoru Matsuzaki; Kazuaki Nishiyabu  ADVANCED PROCESSING AND MANUFACTURING TECHNOLOGIES FOR STRUCTURAL AND MULTIFUNCTIONAL MATERIALS II  29-  (9)  27  -+  2009
• Making and measuring in micro MIM manufacturing

  Kazuaki Nishiyabu; Ian Andrews; Shigeo Tanaka  Metal Powder Report  64-  (9)  22  -25  2009
• Insertion Testing of Polyethylene Glycol Microneedle Array into Cultured Human Skin with Biaxial Tension

  TAKANO Naoki; TACHIKAWA Hiroto; MIYANO Takaya; NISHIYABU Kazuaki  Journal of Solid Mechanics and Materials Engineering  3-  (3)  604  -612  2009
• Advantages of SiC/SiC composites fabrication via micro-porous structure

  Kazuaki Nishiyabu; Satoru Matsuzaki; Masaki Kotani  Progress of Composites 2008 in Asia and Australasia - Proceedings of the 6th Asian-Australasian Conference on Composite Materials, ACCM 2008  40  -43  2008/12
• GS0201 Development of Hydrolytic Biodegradable Painless Microneedles for Transdermal Drug Delivery : Study on Mechanical Design

  Miyano Takaya; Takano Naoki; Nishiyabu Kazuaki  M&M材料力学カンファレンス  2008-  "GS0201  -1"-"GS0201-2"  2008/09
• PS07 Local Stress Analysis in Micro-Parts Made of Porous Titanium by Finite Element Mesh Superposition Method

  Otsuka Kensuke; Takano Naoki; Nishiyabu Kazuaki; Miyano Takaya  M&M材料力学カンファレンス  2008-  "PS07  -1"-"PS07-2"  2008/09
• Fabrication of silicon carbide porous body by powder space holder-polymer impregnation and pyrolysis method

  Kazuaki Nishiyabu; Satoru Matsuzaki; Masaki Kotani  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A  74-  (743)  988  -993  2008/07
• 加水分解性マイクロ針による経皮性薬剤配送システム

  宮野 尚哉; 岡西 孝晃; 高野 直樹; 植村 建; 西籔 和明; 佐藤 裕之; 松崎 康司; 澤村 大輔; 花田 勝美  Drug Delivery System  23-  (3)  412  -412  2008/05
• Accuracy evaluation of ultra-compact gears manufactured by micro-MIM process

  Kazuaki Nishiyabu; Ian Andrews; Shigeo Tanaka  Proceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2008  2-  325  -330  2008/01
• Small is better if testing MIM nano theories

  Kazuaki Nishiyabu; Shigeo Tanaka  Metal Powder Report  63-  (3)  28  -32  2008
• Development of silicon carbide heat-resistant composites with micro-porous structure

  Kazuaki Nishiyabu; Satoru Matsuzaki; Masaki Kotani  ICCM International Conferences on Composite Materials  2007/12
• 424 Evaluation on Functional Properties of Micro Porous Metals Manufactured by PSH-MIM Method

  MATSUZAKI Satoru; SHIMONAKA Susumu; NISHIYABU Kazuaki; TANAKA Shigeo  Materials and processing conference  2007-  (15)  287  -288  2007/11
• 504 Applicability Evaluation of PSH-PIP Method to Woven Fabric Reinforced Ceramics Matrix Composites

  MATSUZAKI Satoru; YAMAMOTO Yudai; NISHIYABU Kazuaki; KOTANI Masaki  Materials and processing conference  2007-  (15)  319  -320  2007/11
• 310 Micro-sacrificial Plastic-mold Insert Metal Powder Injection Molding using Ultra-precision Forming Technologies

  NISHIYABU Kazuaki; MATSUZAKI Satoru; TANAKA Shigeo  Materials and processing conference  2007-  (15)  191  -192  2007/11
• 205 Accuracy Evaluation of Ultra-compact Gears Manufactured by Micro Metal Powder Injection Molding

  NISHIYABU Kazuaki; TANAKA Shigeo  Materials and processing conference  2007-  (15)  103  -104  2007/11
• 3-6 LIGAプロセスを用いた犠牲樹脂型インサート金属粉末射出成形に関する研究(論文奨励賞・優秀賞)(セッション3(受賞講演),日本高専学会第13回年会報告,<特集>木更津年会)

  鹿子 泰宏; 西藪 和明; 田中 茂雄  高等専門学校の教育と研究 : 日本高専学会誌  12-  (4)  9  -9  2007/11
• Manufacturing of micro porous metal parts by powder space holder method

  西籔 和明; 松崎 覚; 田中 茂雄  JCOM講演論文集  36-  125  -129  2007/03
• Quality improvement in LIGA/sacrificial plastic mold insert metal injection molding

  鹿子 泰宏; 西籔 和明; 田中 茂雄  JCOM講演論文集  36-  205  -209  2007/03
• W01(10) Feasibility Study on Micro and High Functional Processings by Metal Powder Injection Molding

  NISHIYABU Kazuaki  The Proceedings of Mechanical Engineering Congress, Japan  2007-  (0)  277  -278  2007
• Micro metal powder injection moulding by LIGA lost form technology and using nano-size metal particle

  Kazuaki Nishiyabu; Yasuhiro Kanoko; Shigeo Tanaka  Proceedings of the Euro Powder Metallurgy Congress and Exhibition, Euro PM 2007  2-  137  -142  2007/01
• Net-shape manufacturing of micro porous metal components by powder injection molding

  Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka  PROGRESS IN POWDER METALLURGY, PTS 1 AND 2  534-536-  (Pt.2)  981  -+  2007
• 001 Micro and High Functional Processings by Metal Powder Injection Molding

  NISHIYABU Kazuaki; KANOKO Yasuhiro; MATSUZAKI Satoru; TANAKA Shigeo  Materials and processing conference  2006-  (14)  275  -276  2006/11
• 町工場が求める産学連携と〔日本塑性加工〕学会の実像 (〔塑性と加工〕550号記念「日本のものづくりを支える中小企業の活力」特集号)

  田中 茂雄; 西藪 和明  塑性と加工  47-  (550)  1081  -1086  2006/11
• Micro Metal Injection Molding Process and It's Application(Synergy by Microparticulation)

  MIURA Hideshi; OSADA Toshiko; TANAKA Shigeo; NISHIYABU Kazuaki  ISSEMP : proceedings of International Symposium on Synergistic Effects of Materials and Processing  2006-  15  -18  2006/09
• Dimensional accuracy of micro-porous metal injection and extrusion molded components produced by powder space holder method

  Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  53-  (9)  776  -781  2006/09
• Size effects of gas nitriding of injection molded Titanium parts

  Toshiko Osada; Shigeo Tanaka; Kazuaki Nishiyabu; Hideshi Miura  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  53-  (9)  745  -749  2006/09
• Effects of metal powder characteristics on the compactibility and sinterability in micro metal injection molding process

  Toshiko Osada; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka; Hideshi Miura  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A  72-  (1)  148  -153  2006/01
• Challenge to Micro Metal Injection Molding

  TANAKA S.; NISHIYABU K.  塑性と加工 = JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY  46-  (538)  1050  -1055  2005/11
• マイクロ多孔質構造が段階的に変化する傾斜機能多層金属の開発 (特集 傾斜機能材料--その魅力と応用展開)

  西藪 和明; 松崎 覚; 田中 茂雄  工業材料  53-  (10)  48  -52  2005/10
• Production of Micro Porous Metal Components by Metal Injection Molding Based Powder Space Holder Method

  NISHIYABU K.  Proceedings of MetFoam2005, Porous Metals and Metal Foaming Technology  2005
• Development of micro metal injection moulding inserted sacrificial plastic mould

  Kensuke Taira; Kenji Okubo; Shigeo Tanaka; Kazuaki Nishiyabu  Euro PM 2005: Powder Metallurgy Congress and Exhibition  2-  391  -397  2005/01
• Fabrication method of micro structured parts by metal injection molding with LIGA process

  Satoru Matsuzaki; Shigeo Tanaka; Kazuaki Nishiyabu  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  52-  (1)  55  -59  2005
• Formation mechanism of micro porous metals produced by powder space holder method

  Satoru Matsuzaki; Shigeo Tanaka; Kazuaki Nishiyabu  Euro PM 2005: Powder Metallurgy Congress and Exhibition  2-  135  -141  2005/01
• Quality improvement of micro metal injection moulding using micro/nano powders

  Kazuaki Nishiyabu; Kenichi Kakishita; Toshiko Osada; Satoru Matsuzaki; Shigeo Tanaka  Euro PM 2005: Powder Metallurgy Congress and Exhibition  2-  357  -363  2005/01
• Advantages of Micro Metal Injection Molding by Minute Mixing-Injection Molding Machine

  NISHIYABU Kazuaki; KAKISHITA Kenichi; YUZUKI Akio; OSADA Toshiko; TANAKA Shigeo  Materials and processing conference  2004-  (12)  81  -82  2004/11
• Fabrication and High-Functionality of Micro Porous Metals by Powder Space Holder Method

  NISHIYABU Kazuaki; MATSUZAKI Satoru; TANAKA Shigeo  Materials and processing conference  2004-  (12)  83  -84  2004/11
• Fabrication and evaluation of micro parts by metal injection molding

  Toshiko Osada; Kazuaki Nishiyabu; Satoru Matsuzaki; Shigeo Tanaka; Hideshi Miura  Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A  70-  (10)  1522  -1528  2004/10
• Miniaturization and Mechanical Properties of Metal Injection Molding

  OSADA Toshiko  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  17-  (5)  1080  -1080  2004/09
• パウダースペースホルダー法によるマイクロポーラス金属の製造技術

  松崎覚; 石田真司; 田中茂雄; 西籔和明  塑性加工春季講演会講演論文集  2004 (CD-ROM)-  2004
• LIGAプロセスと射出成形による微細構造体の作製

  松崎覚; 石田真司; 田中茂雄; 西籔和明  塑性加工春季講演会講演論文集  2004 (CD-ROM)-  2004
• マイクロ金属粉末射出成形における成形条件の影響

  大久保健児; 石田真司; 田中茂雄; 西籔和明  塑性加工春季講演会講演論文集  2004 (CD-ROM)-  2004
• Manufacturing Techniques for Miniaturization and Quality Improvements in Metal Injection Molding Products

  OSADA Toshiko; TANAKA Shigeo; NISHIYABU Kazuaki; MIURA Hideshi  Materials and processing conference  4-  77  -80  2004
• On Micro Metal Injection Molding Method Inserted Plastic Sacrificial Mold

  NISHIYABU Kazuaki; KAKISHITA Kenichi; TAIRA Kensuke; TANAKA Shigeo  Materials and processing conference  4-  85  -86  2004
• Evaluation on the homogeneity of feedstock for micro size parts produced by MIM

  Toshiko Osada; Kazuaki Nishiyabu; Yasuo Karasaki; Shigeo Tanaka; Hideshi Miura  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  51-  (6)  435  -440  2004
• Evaluation on Mixing Condition of Feedstock and Mechanical Properties for Micro Metal Injection Molded Compacts

  OSADA Toshiko; NISHIYABU Kazuaki; TANAKA Shigeo; MIURA Hideshi  Materials and processing conference  2003-  (11)  145  -146  2003/10
• Effects of Metal Powders on Quality Improvements in Micro Metal Injection Molding

  MATSUZAKI Satoru; ISHIDA Masashi; TANAKA Shigeo; NISHIYABU Kazuaki  Materials and processing conference  2003-  (11)  141  -142  2003/10
• Evaluation on Metal Injection Molding of Micro Parts

  OKUBO Kenji; TANAKA Shigeo; ISHIDA Masashi; NISHIYABU Kazuaki  Materials and processing conference  2003-  (11)  143  -144  2003/10
• Examples of Non-contact Strain Field Measurement by Advanced Digital Images Correlation Technique

  Nishiyabu Kazuaki; Akabane Takahiko; Nonaka Hiroshi  The Proceedings of the Symposium on Evaluation and Diagnosis  2003-  (0)  154  -159  2003
• Strain concentrations in woven fabric composites with holes

  Surya D. Pandita; Kazuaki Nishiyabu; Ignaas Verpoest  Composite Structures  59-  (3)  361  -368  2003
• Evaluation of Large Deformation Characteristics in Thermoforming of Knitted Fabric Composites Using Digital Image-based Measurement Technique

  FUJITSU Reiko; TAKANO Naoki; ZAKO Masaru; NISHIYABU Kazuaki  複合材料シンポジウム講演要旨集  27-  189  -190  2002/10
• デジタル画像処理技術を用いた非接触ひずみ分布計測法 (テキスタイル複合材料への応用例)

  西籔和明  日本材料学会, 関西支部講習会, 2002  2002
• テキスタイル複合材料の非接触ひずみ分布計測事例

  西籔和明  日本実験力学会, 研究集会「実験力学における計測 データ処理の問題点 ノウハウ 工夫」, 2002  2002
• Preparation of flexible interphase in FRP and determination of the finite thickness

  Naoyuki Oya; Kazuaki Nishiyabu; Hiroyuki Hamada  Zairyo/Journal of the Society of Materials Science, Japan  51-  (5)  483  -488  2002
• Evaluation on mechanical properties and functionalities of anti-bacteria and resist-corrosion for Cu-added stainless steel (SUS304L) by MIM

  Yooshikazu Masai; Masashi Ishida; Shigeo Tanaka; Kazuaki Nishiyabu  Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy  49-  (9)  834  -840  2002
• Numerical analysis and in-situ SEM observation of damage development for woven fabric composite materials

  Yasutomo Uetsuji; Masaru Zako; Kazuaki Nishiyabu  Zairyo/Journal of the Society of Materials Science, Japan  51-  (10)  1147  -1153  2002
• Strain Distribution During Deep-Drawing Process of Plain and Rid Knitted Fabrics Reinforced Composite Materials

  TAKANO Naoki; NISHIYABU Kazuaki; ZAKO Masaru; FUJITSU Reiko  複合材料シンポジウム講演要旨集  26-  113  -114  2001/11
• Deep-drawing simulation of knitted fabric reinforced thermoplastics by homogenization theory and experimental verification

  N. Takano; Y. Ohnishi; K. Nishiyabu; M. Zako  Zairyo/Journal of the Society of Materials Science, Japan  50-  (5)  461  -467  2001/05
• Strain Distribution in Deep-drawing of Knitted Fabric Thermoplastic Composites

  NISHIYABU K.  7th Japan Int, SAMPE Symp.  709  -712  2001
• Fabrication and mechanical properties of polymorphism composites inserted with knitted polyethylene fabric reinforced polyethylene

  T. Fukui; A. Nakai; H. Hamada; K. Nishiyabu  International SAMPE Symposium and Exhibition (Proceedings)  46 II-  2409  -2420  2001/01
• The formulation of homogenization method applied to large deformation problem for composite materials

  N Takano; Y Ohnishi; M Zako; K Nishiyabu  INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES  37-  (44)  6517  -6535  2000/11
• The Study on Mechanical Properties of Fiber Reinforced Composites with Functional Interphase

  UETSUJI Yasutomo; KITAGAWA Kazuo; NISHIYABU Kazuaki; NISHIWAKI Tsuyoshi; HAMADA Hiroyuki  日本複合材料学会研究発表講演会予稿集  2000-  17  -18  2000
• テキスタイル複合材料のひずみ分布計測

  西籔和明  日本材料学会, 第44回日本学術会議材料研究連合講演会, 講演論文集, 2000  2000
• ITMA'99レポート

  西藪 和明  繊維機械学会誌 = Journal of the Textile Machinery Society of Japan  52-  (7)  P311  -P312  1999/07
• 第 4 回テキスタイルコンポジット国際会議報告

  西籔 和明  成形加工  11-  (3)  185  -186  1999/03
• Strain Fields on Plain Woven Fabric Composites under On-axis Tensile Load : Comparison of Experimental and Numerical Results

  NISHIYABU K.  The 9th European Conference on Composite Materials (ECCM 9), Proceedings, 1999  1999
• Effect of interphase properties on initial damage in embedded single fiber transverse tensile test

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako  Zairyo/Journal of the Society of Materials Science, Japan  48-  (5)  446  -453  1999
• Evaluation of damage behaviors on woven cloth fabric reinforced composites by in-situ SEM observation - effect of surface treatment

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako  Zairyo/Journal of the Society of Materials Science, Japan  48-  (5)  430  -437  1999
• Evaluation of interphase mechanical properties by embedded single fiber transverse tensile test

  K Nishiyabu; M Zako  COMPUTER METHODS IN COMPOSITE MATERIALS VI  225  -235  1998
• Assessment of the influence of interfacial properties on stress transfer in composites by a numerical approach

  K Nishiyabu; A Yokoyama; H Hamada  COMPOSITES SCIENCE AND TECHNOLOGY  57-  (8)  1103  -1111  1997
• Effect of graded interphase properties on stress transfer mechanisms in single fiber composite

  Kazuaki Nishiyabu; Atsushi Yokoyama; Masaru Zako  Zairyo/Journal of the Society of Materials Science, Japan  46-  (4)  335  -342  1997
• Numerical Approach for Evaluation of Stress Transmissibility on Composite Interface

  NISHIYABU Kazuaki; YOKOYAMA Atsushi; HAMADA Hiroyuki  日本複合材料学会研究発表講演会予稿集  1996-  27  -28  1996/05

Industrial Property Rights

• 特開2022-173800:飛沫防止板の回動支持機構、飛沫防止板取付用アタッチメント  2022/11/22

  西籔 和明, 柳橋 肇, 道場 誠司  株式会社モールドサポート, 学校法人近畿大学  202203015588607289
• 特許第6692095号:ブレーカ用防振静音軽量ブラケット  

  西籔 和明, 元井 悟, 加藤 純  日本ニューマチック工業株式会社  202003009222690669
• 特許第6625435号:磁気シールド積層体  

  菅 武, 西籔 和明  藤倉化成株式会社, 学校法人近畿大学  202003009074888900
• 特許第6310719号:マイクロ構造体の製造方法  

  西籔 和明  学校法人近畿大学  201803000831890695
• 特開2018-001384:ブレーカ用防振静音軽量ブラケット  2018/01/11

  西籔 和明, 元井 悟, 加藤 純  日本ニューマチック工業株式会社  201803003197871630
• 特開2017-126644:磁気シールド積層体  2017/07/20

  菅 武, 西籔 和明  藤倉化成株式会社, 学校法人近畿大学  201703011576866828
• 特開2015-168137:繊維強化熱可塑性樹脂部材の融着方法  2015/09/28

  西籔 和明, 田邉 大貴  学校法人近畿大学  201503004175831940
• 特開2015-150634:マイクロ構造体の製造方法  2015/08/24

  西籔 和明  学校法人近畿大学  201503001117819361
• 特開2015-025545:繊維強化樹脂製の締結部品およびその製造方法  2015/02/05

  西籔 和明, 番匠 修平  三星産業貿易株式会社  201503077169423593
• 特許第5168451号:多孔質成形体の製造方法及び多孔質充填成形体の製造方法  2013/01/11

  小谷 政規, 田中 茂雄, 松▲崎▼ 覚, 西籔 和明  独立行政法人 宇宙航空研究開発機構, 太盛工業株式会社  201303068440510096
• 特開2008-222500:多孔質成形体、多孔質充填成形体、多孔質成形体の製造方法及び多孔質充填成形体の製造方法  2008/09/25

  小谷 政規, 田中 茂雄, 松▲崎▼ 覚, 西籔 和明  独立行政法人 宇宙航空研究開発機構, 太盛工業株式会社  200903056962838724
• 特許第4157549号:コンクリート構造物の補修パネルおよび補修工法  2008/07/18

  吉田 次男, 河野 幸彦, 松浦 正, 近藤 充, 誉田 豊, 西籔 和明  関西電力株式会社, 株式会社環境総合テクノス, アイティシー株式会社  201103072467076170
• 特許第4157549号:コンクリート構造物の補修パネルおよび補修工法  2008/07/18

  吉田 次男, 河野 幸彦, 松浦 正, 近藤 充, 誉田 豊, 西籔 和明  関西電力株式会社, 株式会社環境総合テクノス, アイティシー株式会社  200903022794061857
• 特開2007-040026:コンクリート構造物の補修パネルおよび補修工法  2007/02/15

  吉田 次男, 河野 幸彦, 松浦 正, 近藤 充, 誉田 豊, 西籔 和明  関西電力株式会社, 株式会社環境総合テクノス, アイティシー株式会社  200903022794061857
• 特開2006-315353:プラスチックの成形方法  2006/11/24

  誉田 龍介, 西籔 和明  アイティシー株式会社  200903015711734166
• 特開2006-062155:繊維強化プラスチック成型品の製造方法  2006/03/09

  藤井 善通, 西籔 和明  セイコー化工機株式会社  200903011586473040
• 特開2005-022302:繊維強化複合材用プリフォーム及びその製造方法  2005/01/27

  西籔 和明, 藤井 善通  セイコー化工機株式会社  200903075217478672
• 特開2003-160171:回収容易な包装資材とその回収方法  2003/06/03

  川上 肇, 杉山 彩香, 西籔 和明  川上産業株式会社  200903003161587561
• 特開2002-316371:繊維補強プラスチック気泡シートおよびその製造方法  2002/10/29

  西籔 和明, 川上 肇, 岩坂 正基  川上産業株式会社  200903065199443690

Awards & Honors

• 2008 (社)粉体粉末冶金協会 技術進歩賞
   JPN
• 2006 (社)日本材料学会 技術賞
   JPN
• 2006 (社)日本材料学会 関西支部長賞
   JPN
• 2005 (社)日本機械学会 機械材料・材料加工部門 一般表彰(新技術開発部門)
   JPN
• 1998 TexComp-4 「Young Researcher Award」
  
• 1998 (社)日本材料学会 複合材料部門委員会「奨励賞」
   JPN
• 2009年度(社)日本機械学会 機械材料・材料加工部門，部門表彰（新技術開発部門）2010.9.6
  

Research Grants & Projects

• Evaluation on behavior of dissimilar materials and health monitoring by micro/nano scale fusion joining

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2023/04 -2026/03 

  Author : 西籔 和明; 田邉 大貴
• Elucidation of micro / nano particle phenomena in welding process of carbon fiber reinforced thermoplastics near the fiber / polymer interface

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2020/04 -2023/03 

  Author : 西籔 和明; 田邉 大貴

   

  本研究は，炭素繊維強化熱可塑性プラスチック（熱可塑性CFRP）の繊維/樹脂界面近傍での融着接合過程の現象解明を目的とし，融着接合部に添加するマイクロ・ナノ粒子の影響を解明した． 具体的には，研究代表者がこれまで独自に取り組んできた金属粉末冶金技術および樹脂射出成形技術を融合したマイクロ・ナノプロセッシングの研究成果を，研究分担者が独自に取り組んできた熱可塑性複合材料の各種融着接合におけるプロセス研究の成果に応用し，分野横断型の学際的な研究を目指した． 研究の結果，熱可塑性複合材料における抵抗融着や誘導融着，超音波融着等の加熱手法の違いや，加熱・加圧・冷却条件などの融着過程に共通する種々の条件，および融着界面におけるカーボンナノチューブ（CNT）などのマイクロ・ナノサイズの粒子や繊維が融着接合過程での繊維/樹脂界面近傍に及ぼす現象や接合強度に及ぼす影響を実験的に解明することができた． 本研究の成果は，熱可塑性樹脂複合材料の融着接合プロセスにおける普遍的な影響因子を明らかにするものであり，熱可塑性CFRP等の先進材料の融着接合プロセスの高度化に貢献できる．これにより，熱可塑性複合材料の用途拡大をより進めることが可能となり，学術的な独創性や工業的有用性は極めて高いと考えられる．また，マイクロ・ナノテクノロジーとCFRPの成形加工技術を融合した先進的な技術分野を開拓し，普遍性の高い研究成果が産業応用につながると考えられる．
• Fabrication of fusion gradient interphase by nano particle between thermoplastic CFRP and dissimilar materials and its characteristic evaluation

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2017/04 -2020/03 

  Author : Nishiyabu Kazuaki

   

  This study aims to investigate the fusion bonding interface phenomenon between carbon fiber reinforced thermoplastics (CFRTP) and dissimilar materials such as carbon fiber reinforced thermosetting plastics (CFRP). In order to improve quality of the fusion bonding interface, spread carbon fibers or woven carbon fiber was used as joining layer, and fusion bonding was performed by resistance heating or ultrasonic heating. From the experimental results, it was clarified how to avoid the current leakage to joining target during resistance welding. It was also suggested that the application of micro-sized thermoplastic powder or thermoplastic epoxy polymer to improve the tensile shear strength of the joining part between CFRTP and CFRTP.
• Evaluation on Microstructural Forming and Functional Properties of Polymer Film with Nano-particle by Nano-fiber Imprinting

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2014 -2016 

  Author : NISHIYABU Kazuaki

   

  This study aims to investigate the fabrication method of high functional polymer film with single-digit microstructures by electro-spinning nano-fiber imprinting method which PMMA polymer solution added single nano-particle is electrically span on Si form and melted by heating. The advantages of this novel process author developed are possible high precise transcription of micro-structures by micro-fibril of nano-fiber. From the experimental results, the effect of preparation conditions of spinning solution on the shape transcription of microstructures was investigated. The relationship between viscosity of spinning solution and polymer concentration, and an effect on the diameter of nano-fiber was clarified. It was concluded that the the viscosity of spinning solution was increased, and thus reduced the shape transcription of microstructure was by adding nano-particle.
• Fabrication of High Aspect Micro-structured Parts by Nano-fiber Imprinting Plastic Molding

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))

  Date (from‐to) : 2011 -2013 

  Author : Kazaki NISHIYABU

   

  This study aims to fabricate the micro-structured parts using nano-powder via compaction process by printing. The sacrificial plastic mold (SP-mold) which is derived from melting nanofiber produced by electron spinning (ES) method which provides a simple and versatile method for generating ultra-thin fibers using variety of materials is used. The original form made of silicon has micro-sized structures with line and space patterns, circular hole or column. The material used for printing is the mixture of nano-scale Ni or TiO2 powders and water-soluble binder. It was shown from the results of surface observation that the SP-mold with micro-structures of 1 micron wide and 10 micron high in minimum size could be obtained finely, and also the sound sintered parts were obtained.
• Evaluation of Transcription on Micro-structured Parts by Nano-Imprint Lithography Sacrificial Plastic Mold Insert Powder Injection Molding

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))

  Date (from‐to) : 2008 -2010 

  Author : Kazuaki NISHIYABU

   

  This study aims to develop the manufacturing method of micro-structured parts by the metal powder injection molding (MIM) inserted micro-sacrificial plastic molds which were prepared by nano-imprint lithography (NIL) technique. In this process named NIL/μ-SPiMIM, the feedstock composed of nano-sized copper powder and polyacetal-based binder was adequately prepared and molded into polymethylmethacrylate films with fine line-scan structures, and the molded parts were sintered in a reductive gas atmosphere followed by solvent debinding of the films. The behavior in debinding and sintering was investigated by thermo-gravimetric analysis, carbon and oxygen analysis and SEM observation. The effects of sintering temperature on sintered density and shrinkage, profile accuracy were evaluated systematically. It can be concluded that the manufacturing method named NIL/μ-SPiMIM proposed in this study has great potential to produce precisely 3 dimensional complex metallic parts with fine micro-structures.
• 炭化珪素繊維強化耐熱複合材料の製造と力学的特性に関する研究

  JAXA：共同研究

Other link

researchmap

https://researchmap.jp/kazuaki_nishiyabu