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cvd aluminisierungsverfahren to produce a modified platinum aluminidbeschichtung for improved hochtemperaturleistung
cvd aluminisierungsverfahren to produce a modified platinum aluminidbeschichtung for improved hochtemperaturleistung
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机译:cvd渗铝工艺可生产改性的铝化铂涂层,以改善高温性能
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摘要
A method of depositing by chemical vapor deposition a modified platinum aluminide diffusion coating onto a superalloy substrate comprising the steps of applying a layer of a platinum group metal to the superalloy substrate; passing an externally generated aluminum halide gas through an internal gas generator (8) which is integral with a retort (2), the internal gas generator (8) generating a modified halide gas; and co-depositing aluminum and modifier onto the superalloy substrate. In one form, the modified halide gas is hafnium chloride and the modifier is hafnium with the modified platinum aluminum bond coat comprising a single phase additive layer of platinum aluminide with at least about 0.5 percent hafnium by weight percent and about 1 to about 15 weight percent of hafnium in the boundary between a diffusion layer and the additive layer. The bond coat produced by this method is also claimed. IMAGE
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