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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

1Dharmasena, K.P.Wadley, H.N.G.: Electrical conductivity of open-cell foams. J. Mater. Res. 17, 625 2002CrossRefGoogle Scholar
2Hashin, Z.Shtrikman, S.: A variational approach to the theory of the effective magnetic permeability of multiphase materials. J. Appl. Phys. 33, 3125 1962CrossRefGoogle Scholar
3Pervukhina, M.Kuwahara, Y.: Correlations between electrical and elastic properties of solid–liquid composites with interfacial energy-controlled equilibrium microstructures. Earth Planet. Sci. Lett. 265(3–4), 410 2008CrossRefGoogle Scholar
4von Bargen, N.Waff, H.S.: Permeabilities, interfacial areas and curvatures of partially molten systems: Results of numerical computations of equilibrium microstructures. J. Geophys. Res. 91, 9261 1986CrossRefGoogle Scholar
5Takei, Y.: Constitutive mechanical relations of solid-liquid composites in term of grain-boundary contigiuity. J. Geophys. Res. 91(B9), 9261 1998Google Scholar
6Wray, P.J.: The geometry of two-phase aggregates in which the shape of the second phase is determined by its dihedral angle. Acta Metall. 24, 125 1976CrossRefGoogle Scholar
7Banhart, J.: Manufacture, characterization and application of cellular metals and metal foams. Prog. Mater. Sci. 46, 559 2001CrossRefGoogle Scholar
8Taylor, J.E.: The structure of singularities in soap-buble-like and soap-film-like minimal surfaces. Ann. Math 103, 489 1976CrossRefGoogle Scholar
9Goodall, R., Weber, L.Mortensen, A.: The electrical conductivity of microcellular metals. J. Appl. Phys. 100, 044912 2006Google Scholar