Preceramic compositions and ceramic products with an unsaturated organic or organosilicon compound
US5198152A · kind A · utility
40Cited by
4References
20Claims
0Family size
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Key dates
| Filing date | Jan 15, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jan 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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: USPTO / EPO open patent data. Objective bibliographic and citation counts.