Preceramic compositions and ceramic products with an unsaturated

Details Preceramic compositions and ceramic products with an unsaturated Preceramic compositions and ceramic products with an unsaturated

1991-01-15

1993-03-30

Nelson, Peter A.

Compositions

Preservative agents

Anti-corrosion

25240031, 501 88, 501 92, 501 95, 501 96, C09K 300, C04B 3552

Patent

active

051981521

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.

REFERENCES:
patent: 4650837 (1987-03-01), Seyferth et al.
patent: 4720532 (1988-01-01), Seyferth et al.
patent: 4767876 (1988-08-01), Seyferth et al.
patent: 5030744 (1991-07-01), Funayama et al.

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