Influence of Particles on Cell Structure of Al-Mg Alloys Foamed by Melt Foaming Method

Abstract:

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Al-Mg alloy foams containing different Mg contents were synthesized via a conventional melt foaming method. The surface structures of pores formed in resultant foamed alloys was characterized by scanning electron microscopy and x-ray diffractometer. It was found that the pore structures were deteriorated with increasing Mg contents, while the percent porosities did not vary with increasing Mg contents, about 90% and 3~5 mm in pore size. The detailed microstructural examination conducted on increasing Mg containing alloy foams revealed presence of various oxide particles on the surface of individual cells, including MgAl2O4 particles in a form of fine spinel; its small amount for Al-1wt%Mg alloy foam but relative high amount of Al-4wt%Mg one. This suggested the negative effect of MgAl2O4 on the stable pore and thus cell structures in corresponding alloy foams. The possible mechanism associated with MgAl2O4 formation was discussed in the present study.

Info:

Periodical:

Materials Science Forum (Volumes 544-545)

Edited by:

Hyungsun Kim, Junichi Hojo and Soo Wohn Lee

Pages:

363-366

DOI:

10.4028/www.scientific.net/MSF.544-545.363

Citation:

S. H. Park et al., "Influence of Particles on Cell Structure of Al-Mg Alloys Foamed by Melt Foaming Method", Materials Science Forum, Vols. 544-545, pp. 363-366, 2007

Online since:

May 2007

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Price:

$35.00

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