Method for applying aluminide coatings to superalloys

Details Method for applying aluminide coatings to superalloys Method for applying aluminide coatings to superalloys

1986-11-03

1993-06-08

Silverberg, Sam

Coating processes

Coating by vapor, gas, or smoke

Metal coating

C23C 1048

Patent

active

052177572

ABSTRACT:
A powder mixture for applying gas phase aluminide coatings to nickel or cobalt base superalloys is described. A preferred mixture consists essentially of Co.sub.2 Al.sub.5, NH.sub.4 F.HF, and chromium metal. The mixture is substantially free of aluminum oxide.

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G. W. Goward et al, "Formation and Degradation Mechanisms of Aluminide Coatings on Nickel-Base Superalloys," Transactions of the ASM, vol. 60, 1967, pp. 228-241.
K. Godlewski et al, "Effect of Chromium on the Protective Properties of Aluminide Coatings," Oxidation of Metals, vol. 26, Nos. 1/2, 1986, pp. 125-138.

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