Maro Publications

Metallic Foams


from 3/8/2013

Maro Encyclopedia


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A metal foam is a cellular structure consisting of a solid metal, frequently aluminium, containing a large volume fraction of gas-filled pores.  The pores can be sealed (closed-cell foam), or they can form an interconnected network (open-cell foam).  The defining characteristic of metal foams is a very high porosity: typically 7595% of the volume consists of void spaces making these ultralight materials.  The strength of foamed metal possesses a power law relationship to its density; i.e., a 20% dense material is more than twice as strong as a 10% dense material.

Metallic foams typically retain some physical properties of their base material. Foam made from non-flammable metal will remain non-flammable and the foam is generally recyclable back to its base material.  Coefficient of thermal expansion will also remain similar while thermal conductivity will likely be reduced.

(Metallic Foams, Wikipedia, 3/8/2013)


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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

* Date of latest addition; date of first entry is 3/8/2013.