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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.259 SNIP: 0.466 CiteScore™: 0.83

ISSN Imprimer: 2151-4798
ISSN En ligne: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v2.i1.40
pages 35-42

NUMERICAL AND EXPERIMENTAL INVESTIGATIONS ON THE ELECTRICAL CONDUCTIVITY OF FOAM MATERIALS

Weigang Xu
Institute of Metal Research, Chinese Academy of Sciences
Hongtao Zhang
School of Materials Science and Engineering, Central-South University, Changsha 410083, P.R. China
Wei Wei
Institute of Metal Research, Chinese Academy of Sciences
Zhenming Yang
Institute of Metal Research, Chinese Academy of Sciences
Jinsong Zhang
Institute of Metal Research, Chinese Academy of Sciences

RÉSUMÉ

The electrical conductivity of three-dimensional (3D) foam materials is investigated both numerically and experimentally in this work. Four types of 3D models, including the simple cubic skeleton model, tetrakaidecahedron skeleton model, and the body-centered and face-centered structure models are proposed to predict the electrical conductivity of foam materials. These four models have all explicitly taken into account that the structure concept of foam materials and the numerical results based on them are found to be applicable to multiple sets of experimental results. The finite- element analysis results indicate that the electrical conductivity (ρr) of foam materials is generally increased with the increase of their solid volume fractions (f). Moreover, the correlation between the relative electrical conductivity and the volume fraction of foam materials can be described by a general equation, but with different constant values for different structure models. This general relation allows us to accurately and handily estimate the electrical conductivity of the majority of foam materials. It may also provide a way to choose the required empirical correlation in determining the electrical conductivity of different foam structures.