Overlay coatings for superalloys

Details Overlay coatings for superalloys Overlay coatings for superalloys

1984-04-24

1986-04-22

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

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

428629, 428678, B32B 1500

Patent

active

RE0321214

ABSTRACT:
Improved coating compositions are described for the protection of superalloys at elevated temperatures. The coatings are of the MCrAlY type where M is nickel or cobalt and are significantly improved by the addition of from 0.1-7% silicon and 0.1-2% hafnium. Coatings of the invention are preferably applied by plasma spraying and as so applied are found to be substantially more effective than prior art coatings.

REFERENCES:
patent: 4034142 (1977-07-01), Hecht
patent: 4054723 (1977-10-01), Higginbotham et al.
patent: 4078922 (1978-03-01), Magyar et al.
patent: 4094673 (1978-06-01), Erickson et al.
patent: 4109061 (1978-08-01), Beale et al.
patent: 4123595 (1978-10-01), Chang
patent: 4326011 (1982-04-01), Goebel et al.

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