Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00640886" target="_blank" >RIV/68378271:_____/25:00640886 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/25:00648108

Výsledek na webu

<a href="https://hdl.handle.net/11104/0371165" target="_blank" >https://hdl.handle.net/11104/0371165</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-025-21367-x" target="_blank" >10.1038/s41598-025-21367-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Thermodynamic properties of CrMnFeCoNi high entropy alloy at elevated electronic temperatures

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/LM2023068" target="_blank" >LM2023068: Prague Asterix Laser System</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

2045-2322

Svazek periodika

15

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

37335

Kód UT WoS článku

001600998600010

EID výsledku v databázi Scopus

2-s2.0-105019578767