SiC fibers having low oxygen content and methods of preparation
US5171722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/62281
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preparing preceramic SiC fibers having a very low oxygen content by forming fibers from a solution of a polycarbosilane and a vinylic SiC precursor in a mutual volatile solvent, heating fibers in an oxygen-free inert atmosphere to effect a cross-linking reaction therebetween. Also disclosed is a method of preparing SiC fibers having superior high temperature properties and a very low oxygen content comprising heating the above-described cross-linked preceramic fibers in an inert atmosphere substantially free of oxygen for a time and at a temperature sufficient to pyrolyze the cross-linked fibers to SiC fibers. The disclosure also describes the novel fibers produced by the above-described methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.