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

1994-12-28

1996-10-01

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 8, 419 9, 419 10, 419 11, 419 12, 419 32, 419 39, B22F 702

Patent

active

055618278

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: 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.

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