Braze-based protective coating for silicon nitride

Stock material or miscellaneous articles – Composite – Of silicon containing

Reexamination Certificate

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C428S446000, C428S448000, C428S336000, C428S698000, C428S701000, C428S702000, C228S262900

Reexamination Certificate

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07115319

ABSTRACT:
A component comprising a silicon-based substrate and a braze-based protective coating disposed on the silicon-based substrate. The braze-based coating comprises a brazed layer, wherein the brazed layer comprises at least one intermetallic compound. A scale layer may be formed on the brazed layer. An environmental barrier coating may be disposed directly on the brazed layer or directly on the scale layer. A thermal barrier coating may be disposed on the environmental barrier coating. Methods for making a Si-based component having a braze-based protective coating are also disclosed.

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