PRECERAMIC COMPOSITIONS AND CERAMIC PRODUCTS WITH AN UNSATURATED ORGANIC OR ORGANOSILICON COMPOUND

Abstract

A crosslinkable preceramic composition suitable for use as an infiltrant for porous ceramics, such as fiber-reinforced ceramic composites, comprises about 75-99% by weight of a low molecular weight polysilazane and about 1-25% by weight of an unsaturated organic or organosilicon compound containing at least two alkenyl groups, preferably methylvinylcyclosilazane. Infiltration of composites with the infiltrant can be accomplished by melt or solution infiltration, and the subsequent pyrolysis of the infiltrant results in the formation of a densified ceramic article having improved strength.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1ERIC W. LIIMATTA