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Comments on “Electrical conductivity of open-cell metal foams” by K.P. Dharmasena and H.N.G. Wadley [J. Mater. Res. 17, 625 (2002)]

Published online by Cambridge University Press:  31 January 2011

Marina Pervukhina  and
Maxim Lebedev
Marina Pervukhina*
Affiliation:
Commonwealth Scientific and Industrial Research Organization (CSIRO) Petroleum Resources, Kensington WA 6151, Australia
Maxim Lebedev
Affiliation:
Curtin University of Technology, Department of Exploration Geophysics, Kensington WA 6151, Australia; and Commonwealth Scientific and Industrial Research Organization (CSIRO) Petroleum Resources, Kensington WA 6151, Australia
*
a)Address all correspondence to this author. e-mail: marina.pervukhina@csiro.au
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Abstract

Electrical conductivity of open-cell metallic foam calculated by Dharmasena and Wadley using the tetrakaidecahedral cell-based model with ligaments of constant or varying triangular cross sections along the cell edges was mistakenly concluded to strongly overestimate measured electrical conductivities of the open-cell aluminum foams (ERG Duocel). Accurate analysis shows that the model with triangular ligaments on the contrary underestimates the experimental results. A tetrakaidecahedral cell-based model that takes into account the particular ligament geometry, which is determined by constant mean curvature of ligament surfaces, is shown to explain the experimental data of electrical conductivity of the Duocel foams ranging in relative density from 4% to 12%.

Keywords

Electrical propertiesFoamAl
Type
Commentary
Information
Journal of Materials Research , Volume 23 , Issue 5 , May 2008 , pp. 1202 - 1206
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

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