High-strength ceramic composite, process for its preparation...

Details High-strength ceramic composite, process for its preparation... High-strength ceramic composite, process for its preparation...

C - Chemistry, Metallurgy

04

B

117/102, 117/110

C04B 35/14 (2006.01) B32B 18/00 (2006.01) C04B 35/58 (2006.01) C04B 35/589 (2006.01) C04B 35/593 (2006.01) C04B 41/50 (2006.01) C04B 41/87 (2006.01)

Patent

CA 2004394

HOE 88/F 346K Abstract: High-strength ceramic composite, process for its prepara- tion and its use The invention relates to a high-strength ceramic com- posite, in particular made from silicon nitride, a process for its preparation and its use. The process comprises impregnating an open-pore matrix with a molten polysilazane in a first step and, in a second step, heating the impregnated matrix to 800 to 2500°C under a blanketing gas, such as nitrogen or a noble gas, or to 800 to 1500°C under a gas containing ammonia. The high-strength ceramic composite prepared can be used as a component to be subjected to high thermal, mechani- cal or corrosive stress.

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