NICKEL OR COBALT BASE SUPERALLOY ARTICLE HAVING AN ALUMINIDE COATING THEREON AND PROCESS OF MANUFACTURE

摘要

A protective coating system for superalloysis described. The coating is an yttrium enrichedaluminide, and can be formed by aluminizing an MCrAlYor overlay coated superalloy, wherein during thealuminizing process, aluminum diffuses completelythrough the MCrAlY coating and into the substrate.The coating system exhibits desirable oxidationresistance and resistance to thermal fatiguecracking.