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Article

Laves Phase Formation in High Entropy Alloys

1
Institute of Metallurgy, Ural Branch of Russian Academy of Sciences, Amundsena Street 101, 620016 Ekaterinburg, Russia
2
Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
3
M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, 18 S. Kovalevskaya Street, 620108 Ekaterinburg, Russia
4
Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, 108840 Troitsk, Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Jiro Kitagawa
Metals 2021, 11(12), 1962; https://doi.org/10.3390/met11121962
Received: 10 November 2021 / Revised: 2 December 2021 / Accepted: 3 December 2021 / Published: 6 December 2021
One of the intriguing recent results in the field of high-entropy alloys is the discovery of single-phase equiatomic multi-component Laves intermetallics. However, there is no clear understanding that a combination of chemical elements will form such high-entropy compounds. Here we contribute to understanding this issue by modifying the composition of duodenary TiZrHfNbVCrMoMnFeCoNiAl (12x) alloy in which we recently reported the fabrication of hexagonal C14 Laves phase. We consider three alloys based on 12x: 7x = 12x-VCrMoMnFe, 12x + Sc, 12x + Be and observe that all of them crystalize with the formation of C14 Laves phase as a dominant structure. We report that 12x + Be alloy reveals a single-phase C14 structure with a very high concentration of structural defects and ultra-fine dendritic microstructure with an almost homogenous distribution of the constituted elements over the alloy matrix. The analysis of electrical and magnetic properties reveals that the Laves phases are Curie-Weiss paramagnets, which demonstrate metallic conduction; 7x and 12x alloys also reveal a pronounced Kondo-like anomaly. Analysis of experimental data as well as ab initio calculations suggest that chemical complexity and compositional disorder cause strong s-d band scattering and thus the rather high density of d-states in the conduction band. View Full-Text
Keywords: high-entropy alloy; laves phase; microstructure; electrical conductivity; magnetization; density of states; ab initio calculations high-entropy alloy; laves phase; microstructure; electrical conductivity; magnetization; density of states; ab initio calculations
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MDPI and ACS Style

Ryltsev, R.; Gaviko, V.; Estemirova, S.; Sterkhov, E.; Cherepanova, L.; Yagodin, D.; Chtchelkatchev, N.; Dubinin, N.; Uporov, S. Laves Phase Formation in High Entropy Alloys. Metals 2021, 11, 1962. https://doi.org/10.3390/met11121962

AMA Style

Ryltsev R, Gaviko V, Estemirova S, Sterkhov E, Cherepanova L, Yagodin D, Chtchelkatchev N, Dubinin N, Uporov S. Laves Phase Formation in High Entropy Alloys. Metals. 2021; 11(12):1962. https://doi.org/10.3390/met11121962

Chicago/Turabian Style

Ryltsev, Roman, Vasiliy Gaviko, Svetlana Estemirova, Evgenii Sterkhov, Lubov Cherepanova, Denis Yagodin, Nikolay Chtchelkatchev, Nikolay Dubinin, and Sergey Uporov. 2021. "Laves Phase Formation in High Entropy Alloys" Metals 11, no. 12: 1962. https://doi.org/10.3390/met11121962

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