Fiber-reinforced silicon nitride ceramics

Details Fiber-reinforced silicon nitride ceramics Fiber-reinforced silicon nitride ceramics

C - Chemistry, Metallurgy

04

B

25/133

C04B 35/80 (2006.01) C04B 35/58 (2006.01)

Patent

CA 1302059

ABSTRACT OF THE DISCLOSURE Very tough composites of silicon carbide fibers in silicon nitride matrices, especially reaction bonded silicon nitride matrices, can be made by precoating the fibers with pyrolytic carbon and controlling the nitri- dation or other process which forms the silicon nitride matrix so that a thickness of at least 5 nanometers of carbon remains in the composite after it is formed. Failure of such composites is non-catastrophic.

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