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Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures
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Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures
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Journal Article
Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures
2025
Overview
The Cantor alloy (equiatomic CrMnFeCoNi) is a high-entropy alloy with unique physical properties and radiation resistance. To model its response to intense laser pulses, the parameters of the electronic ensemble are required. In this work, the electronic heat capacity, thermal conductivity, and electron-phonon coupling strength at elevated electronic temperatures are evaluated using a combined approach that incorporates tight-binding molecular dynamics and the Boltzmann equation. The damage threshold fluence is estimated for a wide range of photon energies, from XUV to hard X-rays. It is found that at the electronic temperatures ~ 24,000 K (absorbed dose ~ 6 eV/atom), the Cantor alloy experiences
nonthermal
melting due to modification of the interatomic potential induced by electronic excitation, even without the increase of the atomic temperature. This effect must be included in reliable models of CrMnFeCoNi ablation under ultrafast laser irradiation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
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