Minor element additions to single crystals for improved oxidation resistance

摘要: The additions of minor hafnium and silicon mixtures thereof to nickel base superalloy single crystal articles provide significantly improved oxidation resistance. resistance is both for the case uncoated in where a protective coating such as example, MCrAlY coated present. For example addition 0.1% observed improve by factor 4 at 2100° F. similar about 2.5 2150°