Abstract
In this work, the electrical resistivity and thermal conductivity of both as-solution binary Mg–Al and Mg–Zn alloys were investigated from 298 K to 448 K, and the correlation between the corresponding electrical conductivity and thermal conductivity of the alloys was analyzed. The electrical resistivity of the Mg–Al and Mg–Zn alloys increased linearly with composition at 298 K, 348 K, 398 K, and 448 K, while the thermal conductivity of the alloys exponentially decreased with composition. Moreover, the electrical resistivity and thermal conductivity for both Mg–Al and Mg–Zn alloys varied linearly with temperature. On the basis of the Smith–Palmer equation, the thermal conductivity of both binary Mg alloys was found to be correlated quite well with the electrical conductivity in the temperature range from 298 K to 448 K. The corresponding Lorenz number is equal to \(2.162\times 10^{-8} \,\hbox {V}^{2}\cdot \hbox {K}^{-2}\), and the lattice thermal conductivity is equal to \(5.111 \,\hbox {W}\cdot \hbox {m}^{-1}\cdot \hbox {K}^{-1}\). The possible mechanisms are also discussed.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (NFSC) (Project 50725413), the Ministry of Science & Technology of China (Project 2011BAE22B04), and Chongqing Science and Technology Commission (Project CSTC2013JCYJC60001). The authors thank Dr. B. Song and Dr. Y.X. Zhang from Chongqing University for giving valuable advice and kind discussion.
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Pan, H., Pan, F., Wang, X. et al. Correlation on the Electrical and Thermal Conductivity for Binary Mg–Al and Mg–Zn Alloys. Int J Thermophys 34, 1336–1346 (2013). https://doi.org/10.1007/s10765-013-1490-3
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DOI: https://doi.org/10.1007/s10765-013-1490-3