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2002 Fiscal Year Final Research Report Summary

Powder Metallurgical Processing and Development of Functional Composites

Research Project

Project/Area Number 11221203
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (B)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionTohoku University

Principal Investigator

WATANABE Ryuzo  Graduate School of Engineering, Dept. of Materials Processing, Professor, 大学院・工学研究科, 教授 (20005341)

Co-Investigator(Kenkyū-buntansha) KAWASAKI Akira  Tohoku University, Graduate School of Engineering, Dept. of Materials Processing, Associate Professor, 大学院・工学研究科, 教授 (50177664)
OHMORI Mamoru  Tohoku University, Research Inst. Materials, Assistant, 金属材料研究所, 助手 (30005954)
LI Jing-feng  Tohoku University, Graduate School of Engineering, Dept. of Materials Processing, Associate Professor, 大学院・工学研究科, 助教授 (50241542)
Project Period (FY) 1999 – 2001
Keywordsharmonic design of composite / particle assembling / monodisperse particles / orifice ejection method / thermoelectric materials / piezoelectric materials / powder slurry process / spark plasma sintering
Research Abstract

1. Preparation of monodisperse particles : The pulsated-orifice-ejection apparatus for the production of monodisperse particles was devised, and the formation details of the spherical alloy particles were clarified. 2. Function control of particle assembly : The relation between the configuration structure and the function manifestation were studied with particular emphasis on percolation and functionally graded structures. The electrical conductivity, as well as thermoelectric property, was confirmed to manifest by arraying as many as 1000 particles. 3. Particle assembling experiment : Several assembling methods such as picking up with a suction pen, flowing onto a configuration template and linear arraying into a vertical tube, were tested for an effective assemblage of spherical particles, and the manipulating specifications for each of the methods were established. 4. Composite structure formation by the slurry dispensing assemblage : A method dispensing particle slurry and arrayin … More g onto a plate to form a pre-designed composite structure configuration was devised. This method was confirmed to have several advantages for the formation of composite structures, in that it enables us to directly from a three dimensional composite structure and also give us possibilities of various materials selection and combination. 5. Bonding of the arrayed particles and function of the assemblage : Four kinds of bonding were identified for the interparticle bonding, and their formation mechanisms were clarified. The Seebeck coefficient of a linear particle assemblage of Bi-Sb alloy was measured, and a value comparable to that for single crystal was obtained. 6. Functional grading of piezoelectric ceramics : The bending characteristics of unimorph and bimorph actuators with functionally graded structures were evaluated, and we confirmed that they have sufficient bending displacement with a bonding integrity. 7. Composite structure of Al_2O_3-YAG ceramics : A eutectic alloy type of Al_2O_3-YAG ceramics was prepared by spark-plasma sintering. An isometric microstructure was found to be formed, and the products showed good high temperature strength. Less

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 李, 高木, 寺久保, 渡辺: "Electrical and mechanical properties of piezoelectric ceramics/metal composites in the Pb(Zr,Ti)O_3/Pt system"Applied Physics Letters. 79・15. 2441-2443 (2001)

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      「研究成果報告書概要(和文)」より
  • [Publications] 高木, 李, 横山, 渡辺, Almajid, Taya: "Design and Fabrication of Functionally Graded PZT/Pt Piezoelectric Bimorph Actuator"Science and Technology of Advanced Materials. 3. 217-224 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川崎, 康, 渡辺, 市来: "単分散熱電マイクロ粒子の規則配列焼結とその熱電特性"マテリアルインテグレーション. 14・8. 51-55 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 李, 渡辺, 田中, 江刺: "シリコンモールディング法による3次元マイクロ構造体の作製と微小電気機械システムへの応用"マテリアルインテグレーション. 14・8. 45-50 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺, 川崎: "粒子制御配列法による材料の機能複合化"まてりあ. 41・3. 162-165 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J-F Li, K.Takagi, N.Terakubo, R.Watanabe: "Electrical and Mechanical Properties of Piezoelectric Ceramic/metal Composites in the Pb(Zr, Ti) O_3/Pt System"Applied Physics letters. 79-15. 2441-2443 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Takagi, J-F Li, S.Yokoyama, R.Watanabe: "Design and fabrication of functionally graded PZT/Pt bimorph actuator"Science and Technology of Advanced Materials. 3. 217-224 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Kawasaki, S.Kang, R.Watanabe, K.Ichiki: "Sintering of regularly arrayed thermoelectric particles of equal size and the thermoelectric property of the bonded assembly"Materials Integration. 14-8. 45-50 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J-F Li, R.Watanabe, S.Tanaka, M.Esashi: "Fabrication of three-dimensional micro structure by silicon molding method and its application to MEMS"Materials Integration. 14-8. 51-55 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Watanabe, A.Kaswasaki: "Harmonic design and fabrication of functional composite materials by controlled particle assembling-Development of Assembling Methods"Materia Japan. 41-3. 162-165 (2002)

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      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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