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DURABLE ENVIRONMENTAL BARRIER COATINGS FOR CERAMIC SUBSTRATES
DURABLE ENVIRONMENTAL BARRIER COATINGS FOR CERAMIC SUBSTRATES
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机译:陶瓷基体的耐用环境屏障涂料
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摘要
An article includes a substrate and an environmental barrier coating overlying the substrate. The environmental barrier coating includes a first dense layer, an intermediate layer overlying the first dense layer, and a second dense layer overlying the intermediate layer. The first dense layer includes at least one of a first rare earth silicate or barium strontium aluminosilicate and the second dense layer includes at least one of a second rare earth silicate or barium strontium aluminosilicate. Additionally, the intermediate layer includes at least one of a porous microstructure, a lamellar microstructure, or an absorptive material.
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