Graded platinum diffusion aluminide coating

Details Graded platinum diffusion aluminide coating Graded platinum diffusion aluminide coating

C - Chemistry, Metallurgy

23

C

C23C 10/00 (2006.01) C23C 10/02 (2006.01) C23C 10/56 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2414694

Method for forming on a superalloy or other metallic substrate a platinum graded, outward single phase diffusion aluminide coating on a surface of the substrate by depositing a layer comprising Pt on the substrate and then gas phase aluminizing the substrate in a coating chamber having a solid source of aluminum (e. g. aluminum alloy particulates) disposed therein close enough to the surface of the substrate to form at an elevated substrate coating temperature a diffusion aluminide coating having an inner diffusion zone and outer additive single (Ni, Pt)A1 phase layer hawing a concentration of platinum that is relatively higher at an outermost coating region than cat an innermost coating region adjacent the diffusion zone.

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