Patent ID: 6045863
Filing Date: 2000-04-04
Classification: C23C,Y10T

Abstract:
A method of producing a low activity localized aluminide coating on a metallic article, the method comprising the steps of:a. positioning a coating material in tape form on a portion of the article, said coating material comprising a binder, a halide activator, an aluminum source, and an inert ceramic material; andb. heating the coating material and the article in an inert atmosphere between about 1800.degree. F. and about 2050.degree. F. for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum, wherein the metallic article is a superalloy.