B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 18/00 (2006.01) C04B 41/52 (2006.01) C04B 41/89 (2006.01)
Patent
CA 2061312
The anti-oxidation protection 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 SiO2, to be subsequently deposited. The intermediate layer is made of alumina (Al2O3) 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. There is thus achieved an anti-oxidation protection that is effective under both an active oxidation condition and a passive oxidation condition for the silicon compound. A mullite interphase may also be formed between the silicon compound ceramic and the intermediate layer and/or between the intermediate layer and the vitreous outer layer.
Lacoste Marc
Laxague Michel
Thebault Jacques
Sim & Mcburney
Societe Europeenne de Propulsion
Societe Nationale D'etude Et de Construction de Moteurs D'aviati
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