Methods of forming a protective diffusion layer on nickel,...

Details Methods of forming a protective diffusion layer on nickel,... Methods of forming a protective diffusion layer on nickel,...

C - Chemistry, Metallurgy

23

F

117/74.5

C23F 17/00 (2006.01) C23C 10/16 (2006.01) C23C 10/58 (2006.01)

Patent

CA 1236351

ABSTRACT Methods are provided for forming protective diffusion layers on nickel, cobalt and iron base alloy parts comprising the formation of a diffusion layer of platinum, chromium and aluminum on said surfaces either by deposition of platinum and gas phase chromizing followed by aluminizing or by gas phase chromizing and deposition of platinum followed by aluminizing, or by gas phase chromizing followed by aluminizing and deposition of platinum, said gas phase chromizing performed out of contact with a source of gaseous chromizing species at elevated temperature, said aluminizing performed either out of contact or in contact with a powder mixture at elevated temperature.

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