| 摘要 |
An inorganic fiber-reinforced metallic composite material comprising a matrix of a metal or its alloy and inorganic fibers as a reinforcing material, characterized in that (a) the inorganic fibers are inorganic fibers containing silicon, either titanium or zirconium, carbon and oxygen and being composed of (i) an amorphous material consisting substantially of Si, M, C and O, or (ii) an aggregate consisting substantially of ultrafine crystalline particles with a particle diameter of not more than 500 ANGSTROM of beta -SiC, MC, a solid solution of beta -SiC and MC and MC1-x, and amorphous SiO2 and MO2, provided that in the above formulae, M represents titanium or zirconium, and x is a number represented by 0<x<1, or (iii) a mixture of the amorphous material (i) and the aggregate (ii), (b) the inorganic fibers have an initial degradation speed of not more than about 0.3 kg/mm2.sec-1 and a tenacity reduction ratio of not more than about 30% during the production of the composite material, (c) the composite material has a short beam shear strength, measured in the monoaxially reinforced state, of at least about 8 kg/mm2, (d) the composite material has a transverse tensile strength, measured in the monoaxially reinforced state, of at least about 6 kg/mm2, and (e) the composite material has a fatigue limit/tensile strength ratio of at least about 0.4.
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