Method of producing lightweight foamed metal

Details Method of producing lightweight foamed metal Method of producing lightweight foamed metal

1989-09-06

1990-11-27

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

164 79, B22D 2700

Patent

active

049733583

ABSTRACT:
A method is described for producing foamed metal in which gaseous bubbles are retained within a mass of molten metal during foaming. The method comprises heating a composite of a metal matrix and finely divided solid stabilizer particles above the liquidus temperature of the metal matrix, discharging gas bubbles into the molten metal composite below the surface thereof to thereby form a foamed melt on the surface of the molten metal composite and cooling the foamed melt thus formed below the solidus temperature of the melt to form a solid foamed metal having a plurality of closed cells.

REFERENCES:
patent: 2215223 (1940-09-01), Lytle
patent: 2793949 (1957-05-01), Imich
patent: 3300296 (1967-01-01), Hardy et al.
patent: 3843353 (1974-10-01), Niebylski et al.
patent: 3940262 (1976-02-01), Niebylski et al.
G. J. Davies et al; "Metallic Foams: Their Production, Properties and Applications", 1983, Journal of Material Science, 18, pp. 1899-1911.

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