Effect of rapid quenching on phase formation of Zr–Al–Ni–Co–Cu high-entropy alloy

B. A. Rusanov^a, E. V. Sterkhov^b, V. A. Bykov^b, A. I. Rusanova<sup>b

a</sup> Urals State Pedagogical University, Ekaterinburg, Russia
^b Institute of Metallurgy, Ural Division of the Russian Academy of Sciences, Ekaterinburg, Russia

Abstract: In present work, the effect of rapid quenching on the phase formation process of high entropy Zr–Al–Ni–Co–Cu alloy was investigated. It is shown that the basis of the rapidly quenched alloy is the Laves phase ZrCoAl, the solid solution Cu$_{0.6}$ZrCo$_{0.4}$ and the ZrNiAl phase. The exothermic reaction in rapidly quenched sample was found to occur at 960–980 K. The activation energy of this reaction is 293 $\pm$ 6 kJ/mol. It is shown that rapid quenching leads to structural changes, thus changing the thermal stability of the Zr–Al–Ni–Co–Cu alloy.

Keywords: high-entropy alloys, laves phase, zirconia, aluminum, transition metals.

Received: 17.07.2024
Revised: 03.09.2024
Accepted: 04.09.2024

DOI: 10.61011/PJTF.2025.01.59523.20062

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