Lightweight foamed metal and its production

Details Lightweight foamed metal and its production Lightweight foamed metal and its production

C - Chemistry, Metallurgy

22

C

C22C 1/08 (2006.01) B22D 25/00 (2006.01) C22C 1/10 (2006.01) G10K 11/16 (2006.01)

Patent

CA 2066421

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 (21) into the molten metal composite (20) below the surface thereof to thereby form a foamed melt (22) on the surface of the molten metal composite and cooling the foamed melt thus foamed below the solidus temperature of the melt to form a solid foamed metal having a plurality of closed cells. A novel foamed metal product is also described.

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