Composite material component with silicon-containing ceramic matrix, protected against corrosion
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United States of America Patent
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Jun 4, 2013
Grant Date -
Jul 2, 2009
app pub date -
Apr 3, 2007
filing date -
Apr 4, 2006
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Abstract
An environmental barrier is formed on a substrate (10) of ceramic matrix composite material and comprises an outer anticorrosion protection layer (12) containing a compound of the type comprising an aluminosilicate of an alkali, or an alkaline-earth, or a rare-earth element. A bond sub-layer (14) is formed between the substrate (10) and the protection layer (12), the composition of the bond sub-layer varying from substantially pure silicon to substantially pure mullite between an inner face beside the substrate and an outer face, with the silicon content decreasing and the mullite content increasing.
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