Aluminide for use in high-temperature environments

Details Aluminide for use in high-temperature environments Aluminide for use in high-temperature environments

1996-02-26

1997-06-03

Silverberg, Sam

Stock material or miscellaneous articles

Composite

Of metal

427399, 428651, 148253, 416241R, 416241B, B22F 704

Patent

active

056353030

ABSTRACT:
The surface of an aluminide is treated to make it less chemically reactive. In particular, this treatment inhibits oxidation of the aluminide at high temperatures. According to the invention, one coats the aluminide with a solution that containing phosphoric or phosphorous acid, and then one heats the aluminide, so as to calcine the coating. The phosphoric or phosphorous acid reacts with the aluminide to form a surface that resists oxidation. One can use this process to coat the blades of a gas turbine, or to coat other aluminide structures intended for use in high-temperature environments.

REFERENCES:
patent: 2926123 (1960-02-01), Simon
patent: 3176933 (1965-04-01), Clemmons
patent: 4718482 (1988-01-01), Iwama

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