METHOD FOR IMPROVING OXIDATION AND SPALLING RESISTANCE OF DIFFUSION ALUMINIDE COATINGS

摘要

Higher oxidation resistance and high-temperature life result when from 0.01 to 0.30 weight percent of an additive selected from the group consisting of zirconium, yttrium, and mixtures thereof is present in a nickel-base superalloy substrate bearing a diffusion aluminide coating.