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Corelationship Between Powder Metallurgy and Casting Method Using SiC Powder for Metal Foam

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Abstract:

Metal foams are not easy to use as materials as their manufacturing process involves all three, solid, liquid and gaseous phases occurring simultaneously at varying temperatures and moreever the morphology of the solidified foam is quite complex. There has not been any report on the stabilization of metal foams. To compare the stabilisation of metal foams using a different method, powder metallurgy and casting method using SiC and Ca alloy particle are required. Our investigation results showed deeply etched valleys with high oxygen content and secondary phases attached to line-shaped pores with higher SiC content than the matrix. These line-shaped pores - most probably oxide bifilms-form networks decorated with either secondary phases or oxide particle. We suspect that these decorated bifilms play a crucial role in the stabilisation of metal foams.

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Periodical:

Materials Science Forum (Volumes 534-536)

Pages:

945-948

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.945

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Online since:

January 2007

Authors:

Sang Youl Kim, Norbert Babcsán, Duck Kyu Ahn, Yeong Hwan Song, Bo Young Hur

Keywords:

Al Foam, Foaming, Metal Foam, Porosity, Thickening

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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