Heat treatment method for silicon and carbon-containing ceramic fibers and fibers of the same kind with a laminated structure
US5240887A · kind A · utility
2Cited by
1References
2Claims
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Key dates
| Filing date | Aug 23, 1989 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/89
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention is related to a heat treatment method for silicon and carbon-containing ceramic fibers as well as fibers of the same nature with a laminated structure and having an external carbon layer. The processing method for the invention comprises a heat treatment in vacuum, during at least three hours and at a temperature of about 1000.degree. C. This treatment yields fibers surrounded with a layer of endogenic SiO.sub.2, that is itself coated with a layer of endogenic carbon. Said fibers can be used to make composite materials with fiber reinforcement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.