Porous metallic bodies

Details Porous metallic bodies Porous metallic bodies

1984-03-13

1985-12-24

Lieberman, Allan M.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

75245, 75250, 419 2, 419 23, 419 31, 419 38, B22F 310, B22F 316

Patent

active

045606218

ABSTRACT:
Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides are heated in a confining container at a controlled rate to a temperature of about greater than the temperature at which the hydride decomposes. Hydrogen is removed from the container and the remaining metal is heated during a second stage to a temperature greater than the temperature at which it was previously heated but not greater than the temperature of 1/2 to 2/3 the temperature at which the metal melts at a controlled rate. The resulting porous metallic body produced has a density less than about 25 percent theoretical and a pore size of less than about 200 microns. The metallic particles of the present invention have high inner surface area and possess minimum resistance to gas flow.

REFERENCES:
patent: 3669654 (1972-06-01), Berry, Jr.
patent: 3816952 (1974-06-01), Niebyski et al.
patent: 3843353 (1974-10-01), Niebylski et al.
patent: 3961909 (1976-06-01), Shapiro
patent: 4183744 (1980-01-01), Fischer et al.
patent: 4261937 (1981-04-01), Rinde
patent: 4325737 (1982-04-01), Rinde
patent: 4360569 (1982-11-01), Steyert et al.
patent: 4432935 (1984-02-01), Kubo et al.

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