Inorganic fiber-reinforced ceramic composite material

Details Inorganic fiber-reinforced ceramic composite material Inorganic fiber-reinforced ceramic composite material

C - Chemistry, Metallurgy

04

B

261/1

C04B 35/80 (2006.01) C03C 14/00 (2006.01)

Patent

CA 1225667

Abstract of the Invention: 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 inorgnic fibers containing silicon, either titanium or zirconium, carbon and oxygen, (b) the ceramic is at least one material select- ed from the group consisting of carbides, nitrides, oxides, glass ceramics, graphite and specified inorganic materials containing silicon, either titanium or zirconi- um, carbon and oxygen, (c) the inorganic fibers have an initial re- action 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 to 1300 °C, immediately then dipped in water at room tempera- ture, and then dried.

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