Production of metal foams

Details Production of metal foams Production of metal foams

Category

B - Operations, Transporting

Subcategory

22

Subsubcategory

F

IPC codes

B22F 3/11 (2006.01) B22F 5/00 (2006.01)

Type

Patent

Patent number

CA 2298348

Description

A process for producing metal foams comprises (a) mixing one or more metal powders with a gas-liberating blowing agent, (b) heating the mixture to a temperature above the melting point of the lowest-melting metal of the mixture so that the temperature rises from the equilibrium decomposition temperature of the blowing agent to the melting point of the metal in a time which is shorter than the time required to reach the equilibrium state in the blowing agent at this temperature, thereby obtaining a metal foam, and (c) cooling the resulting metal foam to a temperature below the melting point of the lowest-melting metal in the mixture.

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