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Microstructures and Properties of Functionally Gradient Materials

Research Project

Project/Area Number 03452242
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionHokkaido University

Principal Investigator

OKADA Akira  Hokkaido Univ., Faculty of Eng., Assoc.Prof., 工学部, 助教授 (40001341)

Co-Investigator(Kenkyū-buntansha) ISHIDA Iwao  Hokkaido Univ., Faculty of Eng., Instructor., 工学部, 助手 (30001267)
YOSHIIE Toshimasa  Kyoto Univ.KUR,Professor., 原子炉実験所, 教授 (20124844)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1991: ¥4,700,000 (Direct Cost: ¥4,700,000)
KeywordsFunctional Gradient / Interface / Surface layr / Fractography / Composite materials / Microstructure / Boundary / Coating / 境界構造 / 材料特性 / 破壊挙動 / 複合組織 / 材料特性評価 / コ-ティング / フラクトグラフィ- / 複合組識
Research Abstract

1.The functionally gradient materials (FMG) of the surface coating.
(1) The structure and interface of TiC/SiC films coated on C/C composite materials were investigated by TEM,EPMA and X-ray diffraction. Strong preferred orientation exists in these layrs by the epitaxial growth.
(2) The difference of bonding of TiC films on cemented carbides, WC,fabricated by PVD and CVD processes were clearly observed with the acoustic microscopy of Vickers indentations and cracks initiated from them by the SEM fractography.
2.From the viewpoint of the improvement of materials property degradation at the surface layr by the formation of FGM layr, in the later half of the present reseach project, reseach work was concentrated to the surface structure of finished by ultra-fine polishing.
(1) The crystal anisotropy for polishing was investigated. The direct observation of the amorphous layr on a ferrite single crystal was succeeded with the TEM.The depth of surface layr of a single crystal ferrite introduced by polishing was estimated about -3mum.
(2) The structures of surface layr, such as the amorphous layr, poly crystalline layr and dislocation structures, were analyzed for polished single crystals of ferrite with various orientation.
(3) The presently obtained results suggest that the effects from the surface layrs depending on crystal anisotropy, which may be undesireble for the most effective utilization of materials property, may be eliminated by covering the damaged surface with a FGM layr.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 吉田武史、義家敏正、岡田亜紀良、浜田弘一、石田巌、野村俊雄: "PVD法およびCVD法によりTiCを被覆した超硬合金の特性と微細構造との関係" 精密工学会誌. 57. 101-105 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Okada,C.Miyasaka and T.Nomura: "Acoustic Microscopic Observation of the Vickers Indentation on Cemented Carbides Coated with TiC Films by PVD and CVD Processes" Materials Trans.,JIM,. 33. 343-350 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Okada,Y.Yamamota,K.Hamada,T.Yoshiie,I.Ishida and E.Hirota: "Surface Layer of Mechanically Polished Mn-Zn Ferrite Single Crystals" Materials Trans.,JIM,. 34. 73-79 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] (1) T.Yoshida, T.Yoshiie, A.Okada, K.Hamada, I.Ishida and T.Nomura: "Microstructures and Mechanical Properties of TiC Films Coated on WC-Co Cemented Carbides Processed by PVD and CVD" Journal of the Japan Society for Precision Engineering. 57. 101-105 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] (2) A.Okada, C.Miyasaka and T.Nomura: "Acoustic Microscopic Observation of the Vickers Indentation on Cemented Carbides Coated with TiC Films by PVD and CVD Processes." Materials Trans., JIM. 33. 343-350 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] (3) A.Okada, Y.Yamamoto, T.Yoshiie, I.Ishida, K.Hamada and E.Hirota: "Surface Layr of Mechanically Polished Mn-Zn Ferrite Single Crystals." Materials Trans., JIM. 34. 73-79 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] A.Okada,Y.Yamamoto et al.: "Surface Layer of Mechanically Polished Mn-Zn Ferrite Single Crystals" Mater.Trans.,JIM. 34. 343-350 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Akira Okada Chiaki Miyasaka Toshio Nomura: "Acoustic Microscopic observation of the Vickers Indentations on Cemented Carbides Coated with TiC Films by PVD and CVD Processes" Materials Trans.,JIM. 33. 73-79 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Akira Okada Yoshifumi Yamamoto et al.: "Surface Layer of Mechanically Polished Mn-Zn Ferrite Single Crystals" Materials Trans.,JIM. 34. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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