Method of preparing copper-dendritic composite alloys for mechan

Details Method of preparing copper-dendritic composite alloys for mechan Method of preparing copper-dendritic composite alloys for mechan

1987-10-23

1988-09-13

Stallard, Wayland

Metal treatment

Compositions

Heat treating

75 05B, 75 05C, 264 12, 419 66, 419 67, 419 68, 419 69, B22F 300, B22F 908

Patent

active

047707186

ABSTRACT:
Copper-dendritic composite alloys are prepared for mechanical reduction to increase tensile strength by dispersing molten droplets of the composite alloy into an inert gas; solidifying the droplets in the form of minute spheres or platelets; and compacting a mass of the spheres or platelets into an integrated body. The spheres preferably have diameters of from 50 to 2000 .mu.m, and the platelets thicknesses of 100 to 2000 .mu.m. The resulting spheres or platelets will contain ultra-fine dendrites which produce higher strengths on mechanical reduction of the bodies formed therefrom, or comparable strengths at lower reduction values. The method is applicable to alloys of copper with vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron and cobalt.

REFERENCES:
patent: 2273832 (1942-02-01), Carney
patent: 4170466 (1979-10-01), Klar
patent: 4378330 (1983-03-01), Verhoeven et al.
patent: 4481030 (1984-11-01), Schmidt et al.
Bevk et al. (1982), "In Situ Composites IV", Ed. Lempket et al., Elsevier Sci. Publ. Co., pp. 121-133.
Downing et al., (1987), J. Appl. Phys. 61:2621-2625.
Foner (1982), Prog. Powder Met. 38:107-114.
Bevk et al. (1978), J. Appl. Phys. 49:6031-6038.
Verhoeven et al. (1986), J. Metals, Sep. issue, pp. 20-24.
Metals Handbook, vol. 7, "Powder Metallurgy", 9th ed. (1984), pp. 25-39.

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