Superalloy base having a coating containing silicon for corrosio

Details Superalloy base having a coating containing silicon for corrosio Superalloy base having a coating containing silicon for corrosio

1975-12-31

1977-07-05

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

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

204192C, 427250, B32B 1500

Patent

active

040341429

ABSTRACT:
Coatings are described which are particularly suited for the protection of nickel and cobalt superalloy articles at elevated temperatures. The protective nature of the coatings is due to the formation of an alumina layer on the surface of the coating which serves to reduce oxidation/corrosion. The coatings contain aluminum, chromium, yttrium (or other oxygen active elements) and a metal chosen from the group consisting of nickel, cobalt and iron or mixtures thereof. The coatings further contain a controlled percentage of silicon which serves to greatly improve the protection afforded by the alumina film to the surface of the coating.

REFERENCES:
patent: 3741791 (1973-06-01), Maxwell et al.
patent: 3869779 (1975-03-01), Gedwill et al.

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