DoITPoMS

Full Record for Micrograph 636

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Micrograph no
636
Brief description
Alporas' closed cell aluminium foam
Keywords
alloy Link to MATTER Glossary entry for alloy, Alporas, aluminium Link to MATTER Glossary entry for aluminium, aluminium foam, cell Link to MATTER Glossary entry for cell, composite foam, composite material Link to MATTER Glossary entry for composite material, foam Link to MATTER Glossary entry for foam, metal
Categories
Foam, Metal or alloy, Metal or alloy composite foam
System
Al
Composition
Not specified
Standard codes
Reaction
Titanium hydride is used as a foaming agent
Processing
The 'Alporas' technique involves use of 1 to 3 wt% titanium hydride to a modified melt as a foaming agent
Applications
Closed cell aluminium foams are an ultra-light material, with potential structural applications in transport and construction. They may also be used in energy absorbing structures and heat exchangers
Sample preparation
Technique
Photography (no microscope)
Length bar
6 mm
Further information
Additions are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% titanium hydride is then added to the melt, and this foams the melt by releasing hydrogen. The foamed melt solidifies to yield a closed cellular structure with an average cell size of 4.5 mm
Contributor
Dr V Gergely
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
03/10/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales