Superalloy component with dispersion-containing protective coati

Details Superalloy component with dispersion-containing protective coati Superalloy component with dispersion-containing protective coati

1995-03-28

1998-01-27

Nguyen, Ngoc-Yen

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428678, 428614, 416241R, B32B 1504

Patent

active

057120501

ABSTRACT:
A coated superalloy component includes a substrate article formed of a superalloy and an adherent coating over the substrate. The coating is a nickel-base superalloy containing 0.3 volume percent or more of a dispersed oxide of yttrium, hafnium and/or a rare earth, and, preferably, grain boundary strengthening elements such as carbon, zirconium, and boron. The oxide dispersoids improve the performance of the coating in service, reducing the incidence failures due to thermal fatigue, oxidation, and corrosion damage. The dispersoid-containing coating may be formed by directly depositing the oxide-containing coating, or by depositing a metallic coating under conditions which permit the formation of such dispersoids during the deposition process.

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