Coated nickel-base superalloy article and powder and method usef

Details Coated nickel-base superalloy article and powder and method usef Coated nickel-base superalloy article and powder and method usef

1995-11-22

1997-05-13

Jordan, Charles T.

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

420443, 420445, 420460, C22C 1905, C22C 1907

Patent

active

056288140

ABSTRACT:
A nickel-base superalloy article has a coating having a composition, in weight percent, of from about 10 to about 20 percent cobalt, from about 14 to about 25 percent chromium, from about 2 to about 12 percent aluminum, from 0 to about 0.2 percent yttrium, from about 0.001 to about 3 percent boron, from about 1 to about 10 percent silicon, balance nickel and incidental impurities. The coating is preferably applied by mixing together two powders, one with a higher solidus temperature and one with a lower solidus temperature, whose net composition is that of the coating. The powder mixture is compacted with a binder, applied to a surface of the article, and heated to a temperature above the lower solidus temperature.

REFERENCES:
patent: 3539192 (1970-11-01), Prasse
patent: 3632319 (1972-01-01), Hoppin
patent: 4073639 (1978-02-01), Duvall et al.
patent: 4830934 (1989-05-01), Ferrigno et al.
patent: 4842953 (1989-06-01), Perkins et al.
patent: 4937042 (1990-06-01), Perkins et al.
patent: 5240491 (1993-08-01), Budinger et al.
patent: 5359770 (1994-11-01), Brown et al.

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