Slurry compositions for diffusion coatings
AssigneeSermatech International, Inc.
InventorsThomas Kircher, Bruce G. McMordie, Srinivasan Shankar
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Abstract
Slurry coating compositions are provided for metal substrates, particularly nickel or cobalt-containing alloys, that enable inward-type diffusion aluminide coatings having a substantially uniform coating thickness to be formed thereon. Substantially uniform coating thicknesses are achieved independent of applied slurry composition thickness or application method. The slurry coating composition of the invention comprises a Cr--Al alloy containing about 50 wt % to about 80 wt % Cr in the alloy, LiF in an amount greater than or equal to 0.3 wt % of the Cr--Al alloy, an organic binder, and a solvent.
Claims7
A slurry coating composition for the preparation of an inward-type diffusion aluminide coating, the slurry coating composition comprising:
- a. solid pigments, in the amount of from about 30% by weight to about 80% by weight of the slurry coating composition, said solid pigments comprising:
- (1) Cr--Al alloy containing from about 50 wt % Cr to about 80 wt % Cr in said alloy;
- (2) LiF in an amount from about 0.3 wt. % to about 15 wt % of said Cr--Al alloy;
- b. an organic binder;
- and
- c. a solvent.
Dependencies are inferred from the claim text.