| 摘要 |
<p>An inorganic fiber-reinforced ceramic composite material comprising a matrix of a ceramic and inorganic fibers as a reinforcing material, characterized in that (a) the inorganic fibers are specified inorganic fibers containing silicon, either titanium or zirconium, carbon and oxygen, (b) the ceramic is at least one material selected from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite and specified inorganic materials containing silicon, either titanium or zirconium, carbon and oxygen, (c) the inorganic fibers have an initial reaction degradation speed of not more than 0.35 kg/mm2.sec-1 and a tenacity reduction ratio of not more than 40% during the production of the composite material, (d) the composite material has a critical stress intensity factor about 2 to 7 times as high as that of said matrix alone, and (e) the composite material has a bending strength reduction ratio, measured by a thermal shock fracture resistance measuring method, of not more than about 10% after it is heat-treated in air at 800 DEG to 1300 DEG C., immediately then dipped in water at room temperature, and then dried.</p> |
