Processing and properties of iron-based metallic foams

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EditorSearch for: Ruas, Candido; Search for: Tomlin, Ted A.
Proceedings titleAdvances in powder metallurgy & particulate materials: proceedings of the 2005 international conference on powder metallurgy & particulate materials
ConferenceInternational Conference on Powder Metallurgy & Particulate Material: Montreal, Quebec, June 19-23, 2005
Pages136–; # of pages: 1
AbstractA process based on a powder metallurgy approach was developed to produce open-cell metallic foams. A metallic powder, a solide polymeric binder and a chemical foaming agent are dry-mixed together. The molded mixture is then heat-treated in a three-step thermal treatment including foaming, debinding and sintering. This paper describes the microstructure and properties of iron-based foams (pure Fe and Fe-1.25%C) obtained with this process. The final material is highly porous (90% porosity) and has an interconnected porosity network. The structure of the resulting material is relatively complex and has 3 levels of porosity (i.e. main cells, windows and microporosity). The compressive mechanical properties are affected by the density and composition of the material. Compressive properties (i.e. compressive yield strength, modulus, energy absorbed at densification) increase with density. In addition, the compressive yield strength and energy absorbed at densification increase significantly while the modulus is little affected by the carbon content. The material structure and properties are interesting for light weight structures and energy absorption. The process is relatively simple and the materials produced provide a low cost alternative to aluminum foams.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NPARC number18914968
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Record identifier2e37ea05-ed5d-431d-ad20-bfaf62e88844
Record created2011-11-10
Record modified2016-05-09
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