Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-02-19
1994-07-26
Robinson, Ellis P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428246, 428336, 428375, 428389, 428408, 428426, 428432, 428688, 428689, 428698, 428699, 428701, 428702, B32B 702
Patent
active
053326199
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.
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Lacoste Marc
Laxague Michel
Thebault Jacques
Robinson Ellis P.
Societe Europeenne de Propulsion
Speer Timothy M.
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