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@article{2400438,
author = {Stasiak, Tomasz and Debnárová, Stanislava and Lin, Shuyao and Koutná, Nikola and Czigány, Zsolt and Balázsi, Katalin and Buršíková, Vilma and Vašina, Petr and Souček, Pavel},
article_number = {June 2024},
doi = {http://dx.doi.org/10.1016/j.surfcoat.2024.130839},
keywords = {High entropy carbide; High entropy alloy; Multicomponent ceramics; Multicomponent material; Thin film; Magnetron sputtering},
language = {eng},
issn = {0257-8972},
journal = {Surface and Coatings Technology},
title = {Synthesis and characterization of ceramic high entropy carbide thin films from the Cr-Hf-Mo-Ta-W refractory metal system},
url = {https://www.sciencedirect.com/science/article/pii/S0257897224004705},
volume = {485},
year = {2024}
}
TY - JOUR
ID - 2400438
AU - Stasiak, Tomasz - Debnárová, Stanislava - Lin, Shuyao - Koutná, Nikola - Czigány, Zsolt - Balázsi, Katalin - Buršíková, Vilma - Vašina, Petr - Souček, Pavel
PY - 2024
TI - Synthesis and characterization of ceramic high entropy carbide thin films from the Cr-Hf-Mo-Ta-W refractory metal system
JF - Surface and Coatings Technology
VL - 485
IS - June 2024
SP - 1-12
EP - 1-12
PB - Elsevier B.V.
SN - 02578972
KW - High entropy carbide
KW - High entropy alloy
KW - Multicomponent ceramics
KW - Multicomponent material
KW - Thin film
KW - Magnetron sputtering
UR - https://www.sciencedirect.com/science/article/pii/S0257897224004705
N2 - We use reactive DC magnetron sputtering to showcase synthesis strategies for multicomponent carbides with the NaCl-type fcc structure and illustrate how deposition conditions allow controlling the formation of metallic and ceramic single phases in the Cr-Hf-Mo-Ta-W system. The synthesis is performed in argon flow and different acetylene flows from 0 to 12 sccm, at ambient and elevated temperatures (700 °C), respectively, hindering/promoting the adatom diffusion. Structural and microstructural investigations reveal the formation of the bcc metallic phase (a = 3.188−3.209 Å) in films deposited without acetylene flow, also supported by ab initio density function theory (DFT) analysis of lattice parameters as a function of the C content. Experimentally, a bcc-to-fcc phase transition is observed through the formation of an amorphous coating. Contrarily, samples deposited in higher acetylene flow show an fcc multielement carbide phase (a = 4.33−4.49 Å). The crystalline films reveal columnar morphology, while the amorphous ones are very dense. We report promising mechanical properties, with hardness up to 25 ± 1 GPa. The indentation moduli reach up to 319 ± 6 GPa and show trends consistent with DFT predictions. Our study paves the path towards the preparation of Cr-Hf-Mo-Ta-W multicomponent carbides by magnetron sputtering, showing promising microstructure as well as mechanical properties.
ER -
STASIAK, Tomasz, Stanislava DEBNÁROVÁ, Shuyao LIN, Nikola KOUTNÁ, Zsolt CZIGÁNY, Katalin BALÁZSI, Vilma BURŠÍKOVÁ, Petr VAŠINA and Pavel SOUČEK. Synthesis and characterization of ceramic high entropy carbide thin films from the Cr-Hf-Mo-Ta-W refractory metal system. \textit{Surface and Coatings Technology}. Elsevier B.V., 2024, vol.~485, June 2024, p.~1-12. ISSN~0257-8972. Available from: https://dx.doi.org/10.1016/j.surfcoat.2024.130839.
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