Multicomponent binders for sic powders

Details Multicomponent binders for sic powders Multicomponent binders for sic powders

C - Chemistry, Metallurgy

04

B

261/2

C04B 35/56 (2006.01) C04B 35/571 (2006.01) C04B 35/64 (2006.01)

Patent

CA 2031583

MULTICOMPONENT BINDERS FOR SiC POWDERS Abstract The preparation of highly densified ceramic bodies by the sintering of certain organosilicon polymers, carbon sources, silicon carbide powders, metal-containing sintering aids and, optionally, curing agents is described. Such highly densified ceramic bodies can be prepared by either a pressureless sintering process or a hot press sintering process. The compositions of this invention can be formed into desired shapes and then sintered to form ceramic, shaped bodies with high densities. One advantage of the present invention is that the green bodies have relative high strengths and thus can be easily handled and, if desired, machined before sintered. A second advantage is that any organosilicon polymer can be utilized, regardless of char yield or free carbon value, since the carbon is derived from a carbon source which yields a carbon char upon pyrolysis.

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