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Vacuum Foaming of Aluminum Scrap

Published online by Cambridge University Press:  18 December 2012

J. A. Garabito ,
H. Granados ,
V. H. López ,
A. R. Kennedy  and
J. E. Bedolla
J. A. Garabito*
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U” Ciudad Universitaria, Morelia, Mich., México.
H. Granados
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U” Ciudad Universitaria, Morelia, Mich., México.
V. H. López
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U” Ciudad Universitaria, Morelia, Mich., México.
A. R. Kennedy
Affiliation:
Faculty of Engineering, University of Nottingham, University Park, NG72RD, UK.
J. E. Bedolla
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U” Ciudad Universitaria, Morelia, Mich., México.
*
*E-mail: garabo_coria@hotmail.com
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Abstract

In this study, scrap from the automotive industry was used to produce aluminium foams under vacuum. Chips of an aluminium alloy LM26 were melted and 1wt. % of Mg was added for creating a viscous casting with uniform distribution of oxides. An ingot was obtained of this alloy after casting and solidification. Trials for foaming this alloy were performed by re-melting pieces under vacuum at different temperatures. A window in the vacuum chamber allowed observation of the foaming and collapse of the porous structures was observed during cooling. Characterization of the aluminum foams revealed different levels of expansion, porous structures and degrees of drainage. The best foams were obtained at 680 °C with a density of 0.78 g/cm3. This technique appears to be a feasible low cost route for producing Al foams based on scrap material.

Keywords

AlCastingFoam
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1481: Symposium 2D – Structural and Chemical Characterization of Metals, Alloys and Compounds—2012 , 2012 , pp. 83 - 88
Copyright
Copyright © Materials Research Society 2012

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References

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