Method of preparing powders for hard materials from cobalt salts

Details Method of preparing powders for hard materials from cobalt salts Method of preparing powders for hard materials from cobalt salts

1995-11-14

1997-05-27

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

75351, 75361, 75371, B22F 924

Patent

active

056328249

ABSTRACT:
There is disclosed a method for preparing a powder containing ammonium salts of W+Co(Ni) complex ions, through chemical reactions, in a water solution at temperatures from 70.degree. C. to the boiling point and at pH around neutral, between tungstate salts and cobalt (nickel) salts characterized in that said tungstate salts are the highly soluble sodium tungstate or ammonium metatungstate.

REFERENCES:
patent: 3440035 (1969-04-01), Iwase et al.
patent: 3488291 (1970-01-01), Hardy et al.
patent: 5352269 (1994-10-01), McCandlish et al.

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