Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F22%3A43967295" target="_blank" >RIV/49777513:23640/22:43967295 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.apsusc.2022.153427" target="_blank" >https://doi.org/10.1016/j.apsusc.2022.153427</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2022.153427" target="_blank" >10.1016/j.apsusc.2022.153427</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys

Popis výsledku v původním jazyce

In the context of current state of the art, understanding the laser ablation efficiency decrease for pulse durations High-entropy alloy; CrMnFeCoNi; Ultrafast laser ablation; Pulse duration; Ablation efficiency; Stress confinementexceeding the mechanical relaxation time of a few ps remains a pending research question. A heuristic approach may be used to reveal the role of effective penetration depth on ablation efficiency. Extending familiar contributions of this quantity by a term related to the mechanical surface expansion during pulse irradiation, the relation of ablation efficiency and pulse duration is deciphered. Thus, longer pulses are coupled into an expanded surface, revealing a direct link to the violation of stress confinement. To best demonstrate this hypothesis, a material with high electron–phonon coupling as well as low thermal conductivity, i.e., strong electron localization, is required. These properties are accomplished by high-entropy alloys, and the CrMnFeCoNi alloy serves as prime candidate. We report on single-pulse ablation efficiency experiments of the CrMnFeCoNi alloy which are support by our proposed model.

Název v anglickém jazyce

Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys

Popis výsledku anglicky

In the context of current state of the art, understanding the laser ablation efficiency decrease for pulse durations High-entropy alloy; CrMnFeCoNi; Ultrafast laser ablation; Pulse duration; Ablation efficiency; Stress confinementexceeding the mechanical relaxation time of a few ps remains a pending research question. A heuristic approach may be used to reveal the role of effective penetration depth on ablation efficiency. Extending familiar contributions of this quantity by a term related to the mechanical surface expansion during pulse irradiation, the relation of ablation efficiency and pulse duration is deciphered. Thus, longer pulses are coupled into an expanded surface, revealing a direct link to the violation of stress confinement. To best demonstrate this hypothesis, a material with high electron–phonon coupling as well as low thermal conductivity, i.e., strong electron localization, is required. These properties are accomplished by high-entropy alloys, and the CrMnFeCoNi alloy serves as prime candidate. We report on single-pulse ablation efficiency experiments of the CrMnFeCoNi alloy which are support by our proposed model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF15_003%2F0000358" target="_blank" >EF15_003/0000358: Výpočetní a experimentální design pokročilých materiálů s novými funkcionalitami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

APPLIED SURFACE SCIENCE

ISSN

0169-4332

e-ISSN

1873-5584

Svazek periodika

594

Číslo periodika v rámci svazku

AUG 30 2022

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

nestrankovano

Kód UT WoS článku

000802562700004

EID výsledku v databázi Scopus

2-s2.0-85129032983