Process for anti-oxidation protection of a material of which at least a surface is made of a ceramic formed from a silicon compound, and a material obtained by said process
US5332619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2984
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Anti-oxidation protection for a silicon compound under both an active oxidation condition and a passive oxidation condition is achieved by forming an intermediate layer devoid of the element silicon between the surface of the silicon compound ceramic, such as SiC, and a silica based vitreous outer layer, such as SiO.sub.2, to be subsequently deposited. The intermediate layer is made of alumina (Al.sub.2 O.sub.3) or an alumina precursor, so as to constitute a reaction barrier between the silicon compound and the silica outer layer on the one hand, and trap any amount of silica that may be formed by an oxidation of the silicon compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.