METHOD FOR PRODUCING METAL FOAM PRECURSOR AND METHOD FOR PRODUCING METAL FOAM

Title:

METHOD FOR PRODUCING METAL FOAM PRECURSOR AND METHOD FOR PRODUCING METAL FOAM

Document Type and Number:

WIPO Patent Application WO/2010/106883

Kind Code:

A1

Abstract:

The purpose of this invention is to easily produce a metal foam precursor and a metal foam without using an expensive foaming agent powder. Adding alumina when conducting friction stir processing (FSP) improves the sphericity of the pores in a metal foam and increases the porosity of the metal foam. A die-cast molding (12) that contains gas in the interior is prepared by means of die-casting. Next, a metal foam precursor (16) is produced by dispersing the gas and pore-forming nuclei contained in the interior of the die-cast molding (12) uniformly in the die-cast molding (12) by means of FSP. The metal foam precursor (16) is expanded through a heat treatment that heats the metal foam precursor (16) to near the melting point thereof to produce a metal foam.

Inventors:

HANGAI YOSHIHIKO (JP)
UTSUNOMIYA TAKAO (JP)

Application Number:

PCT/JP2010/052821

Publication Date:

September 23, 2010

Filing Date:

February 24, 2010

Export Citation:

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Assignee:

UNIV GUNMA NAT UNIV CORP (JP)
SHIBAURA INST TECHNOLOGY (JP)
HANGAI YOSHIHIKO (JP)
UTSUNOMIYA TAKAO (JP)

International Classes:

C22C1/08; B22D17/00; B22D25/02; B22D29/00

Foreign References:

JP2007275980A	2007-10-25
JP2007229791A	2007-09-13
JP2002001549A	2002-01-08
JP2007302997A	2007-11-22