Molybdenum-containing high temperature coatings for nickel- and cobalt-based superalloys

摘要

Disclosed are novel high temperature coatings which may be applied to turbine engine components to provide improved thermal fatigue resistance as well as improved oxidation and corrosion resistance. The compositions have one of the following general formulas: MCrAl+Rare Earth Metal (1) MCrAl+Rare Earth Metal+Noble Metal (2) MCrAl+Rare Earth Metal+Refractory Metal; or (3) MCrAl+Rare Earth Metal+Noble Metal+Refractory Metal (4) wherein M is a solid solution of molybdenum, tungstun or niobium in nickel, cobalt or nickel plus cobalt.