Forming reactive element modified aluminide coatings with low reactive element content using vapor phase techniques

摘要

Vapor phase coating techniques with improved control over the co-transfer and co-deposition of aluminum and reactive element(s) from sources to the article being coated. One method includes providing a reactive element source, wherein at least a portion of the reactive element source comprises a non-halide compound of a reactive element, providing an aluminum source, providing a halide activator, and heating an article having a metallic surface, the reactive element source, the aluminum source, and the halide activator under conditions effective to cause species comprising aluminum and the reactive element to be co-deposited onto said surface to form a coating.

主权项

1. A method of coating an article, comprising the steps of:
a) providing the article, said article having a metallic surface; b) providing a reactive element source, wherein at least 25 weight percent of the reactive element source is an oxide of Hf; c) providing an aluminum source, and wherein the reactive element source and the aluminum source are used in amounts such that reactive element source is from 1 to 30 weight percent of the aluminum source; d) providing a halide activator; and e) heating the article, reactive element source, aluminum source, and halide activator under conditions effective to cause vapor species comprising aluminum and the oxide of Hf to be co-deposited onto said metallic surface to form an aluminide coating.