Silicon carbide fiber reinforced ceramic composites

Details Silicon carbide fiber reinforced ceramic composites Silicon carbide fiber reinforced ceramic composites

C - Chemistry, Metallurgy

04

B

49/92

C04B 35/80 (2006.01) B32B 5/22 (2006.01) C03C 14/00 (2006.01)

Patent

CA 1156044

Silicon Carbide Fiber Reinforced Ceramic Composites Abstract A silicon carbide fiber reinforced ceramic matrix com- posite is disclosed having high strength, fracture toughness, and oxidative stability even at high temperature use. The composite is made up of a plurality of ceramic layers, each layer reinforced with a plurality of unidirectional con- tinuous length silicon carbide fibers, each layer having an axial flexural strength greater than 70,000 psi and a high fracture toughness, exemplified by a critical stress inten- sity factor greater than 10 x 103 psi (inch)1/2. The com- posite is formed by starting with the ceramic matrix mate- rial in the glassy state and converting it from the glassy state to the ceramic state after densification of the com- posite.

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