Oxidation resistant copper

Details Oxidation resistant copper Oxidation resistant copper

1995-08-24

1997-06-17

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Treating loose metal powder, particle or flake

75351, 75365, 75373, B22F 924

Patent

active

056393180

ABSTRACT:
Oxidation resistant particles composed of copper and at least one metal hng a valence of +2 or +3 and having an intermediate lattice energy for the metal in its hydroxide form. The metal is selected from nickel, cobalt, iron, manganese, cadmium, zinc, tin, magnesium, calcium and chromium. In one embodiment, the phases of copper and at least one metal in the particles are separate and the concentration of the metal is greater near the surface of the particles than inwardly thereof. Process for making the oxidation resistant copper particles includes the steps of dissolving a copper salt and a salt of at least one of the metals in a suitable solvent or diluent; forming primary particles of copper and at least one metal in basic form by mixing a base and the salt solution; separating, washing and drying the primary particles; reducing the primary particles to metallic form; and heat treating the particles in metallic form at an elevated temperature.

REFERENCES:
patent: 2754193 (1956-07-01), Graham et al.
patent: 3583864 (1971-06-01), Adler
patent: 4778517 (1988-10-01), Kopatz et al.
patent: 5486225 (1996-01-01), Dye et al.

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