Fabrication and Mechanical Properties of Al_2O_3-SiC/TiC/Ni Functionally Graded Materials by SHS/HIP(Materials, Metallurgy & Weldability)

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Author(s)

Abstract

Dense Functionally Graded Materials (FGMs) in the systems of Al_2O_3/TiC/Ni and Al_2O_3-SiC/TiC/Ni were fabricated by SHS/HIP. Due to the rapid high temperature heating and the use of effective additives, the grain growth could be well controlled. The residual stress produced in the outer Al_2O_3 and Al_2O_3-SiC layers, which was induced by the thermal expansion mismatch between the inner TiC/Ni and the outer ceramic layers, was in the range of -220MPa to -500MPa. Two methods were used to measure the R-curve behavior of FGMs. For the indentation-strength method, the compressive stress of the outer ceramic layers showed steep R-curve behavior. For the single edge notch bend (SENB) method, the toughness of the FGM increased in the compression area and reached its maximum of 33MPam^<1/2> at the interface of the compressive stress and the tensile stress areas. In the tension area the value of toughness decreased.

Journal

  • Transactions of JWRI

    Transactions of JWRI 29(2), 37-44, 2000-12

    Osaka University

Codes

  • NII Article ID (NAID)
    110006486084
  • NII NACSIS-CAT ID (NCID)
    AA00867058
  • Text Lang
    ENG
  • ISSN
    03874508
  • Data Source
    NII-ELS 
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