Thermal expansion and enhanced heat transfer in high-entropy alloys

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...

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Bibliographic Details
Published in:Journal of applied crystallography 2013-06, Vol.46 (3), p.736-739
Main Authors: Lu, Chieh-Lien, Lu, Sheng-Yi, Yeh, Jien-Wei, Hsu, Wen-Kuang
Format: Article
Language:English
Subjects:
Alloys
Crystallography
Dilation
Entropy
Heat transfer
High temperature
high-entropy alloys
Lattices
Mean free path
Thermal diffusivity
Thermal energy
Thermal expansion
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Summary: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.
ISSN:1600-5767
0021-8898
1600-5767
DOI:10.1107/S0021889813005785