Aluminide for use in high-temperature environments
OwnerWilliam B. Retallickinventor
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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.
Claims22
A metallic product usable in high-temperature environments, the product being made by the steps of selecting an aluminide, applying a substance selected from the group consisting of phosphoric acid and phosphorous acid to the aluminide to form a coating on the aluminide, and calcining the coating.
A method of making an aluminide suitable for use in high-temperature environments, the method comprising the steps of selecting an aluminide, applying a substance selected from the group consisting of phosphoric acid and phosphorous acid to the aluminide to form a coating on the aluminide, and calcining the coating.
Dependencies are inferred from the claim text.