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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys
Original language description
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.
Czech name
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Czech description
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Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/EF15_003%2F0000358" target="_blank" >EF15_003/0000358: Computational and Experimental Design of Advanced Materials with New Functionalities</a>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP) S - Specificky vyzkum na vysokych skolach I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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