Fiber-reinforced silicon nitride ceramics
US4869943A · kind A · utility
16Cited by
3References
7Claims
0Family size
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Key dates
| Filing date | Aug 6, 1986 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Aug 6, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Very tough composites of silicon carbide fibers in silicon nitride matrices, especially reaction bonded silicon nitride matrices, can be made by precoating the fibers with pyrolytic carbon and controlling the nitridation or other process which forms the silicon nitride matrix so that a thickness of at least 5 nanometers of carbon remains in the composite after it is formed. Failure of such composites is non-catastrophic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.