Strengthened protective coatings for superalloys

Details Strengthened protective coatings for superalloys Strengthened protective coatings for superalloys

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) B32B 15/01 (2006.01) C23C 30/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2076124

13DV-8335 STRENGTHENED PROTECTIVE COATING FOR SUPERALLOYS ABSTRACT OF THE DISCLOSURE A superalloy component includes a substrate article of a superalloy, and a strengthenable, adherent coating on the substrate. The coating is preferably a nickel-base superalloy that is strengthened by the formation of gamma and gamma-prime phases. The coating is stronger than conventional MCrAlX coatings, and, therefore, more resistant to thermal fatigue. One operable coating has a composition, in weight percent, of about 7.5 percent cobalt, about 9 percent chromium, about 6 percent aluminum, about 1 percent titanium, about 1.5 percent molybdenum, about 4 percent tantalum, about 3 percent tungsten, about 3 percent rhenium, about 0.5 percent hafnium, about 0.3 percent yttrium, about 0.5 percent columbium, about 0.05 percent carbon, about 0.015 percent boron, about 0.015 percent zirconium, and balance nickel.

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