Method of manufacturing a composite material with vitroceramic or ceramic matrix using a sol-gel process
US5126087A · kind A · utility
33Cited by
2References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 20, 1988 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of manufacturing a composite material formed of a fibrous reinforcement and a silica based ceramic or vitro-ceramic matrix. The method includes impregnating the fibrous reinforcement by means of a sol-gel process wherein premature crystallization of the matrix obtained from the sol is hindered by addition to the sol of a crystallization retarding agent, and hot pressing the resulting material. The composite material formed has a residual porosity without the addition of nucleating agents of about less than 10%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.