Coating system for superalloys

Details Coating system for superalloys Coating system for superalloys

1974-09-24

1978-03-21

Steiner, Arthur J.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

428652, 428678, 428926, B32B 1520

Patent

active

040804860

ABSTRACT:
A protective coating system is provided for nickel-base and cobalt-base superalloys which is capable of imparting oxidation and corrosion resistance at elevated temperatures. The superalloy body is first coated by physical vapor deposition with a composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and at least one element selected from the group consisting of iron, cobalt and nickel, and thereafter the body is subjected to an aluminizing overcoating to increase the corrosion resistance.

REFERENCES:
patent: 3649225 (1972-03-01), Simmons
patent: 3676085 (1972-07-01), Evans et al.
patent: 3741791 (1973-06-01), Maxwell et al.
patent: 3754903 (1973-08-01), Goward et al.
patent: 3869779 (1975-03-01), Gedwill et al.

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