Journal of Applied Crystallography

Volume 46, Part 3 (June 2013)

research papers

J. Appl. Cryst. (2013). 46, 736-739    [ doi:10.1107/S0021889813005785 ]

Thermal expansion and enhanced heat transfer in high-entropy alloys

C.-L. Lu, S.-Y. Lu, J.-W. Yeh and W.-K. Hsu

Abstract: Alloys made from equimolar mixtures of more than five elements exhibit an improved thermal diffusivity at elevated temperatures, and the improvement reaches 20% at 423 K and 50% at 573 K. This phenomenon is identified from the lengthened mean free path upon thermal expansion, and lengthening scales with lattice dilation over a wide range of temperatures.

Keywords: high-entropy alloys; thermal diffusivity.

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