Issues »  Volume 44, Issue 3

Structure, Phase Composition and Magnetic Properties of Ultrafine Powders of High-Entropy Alloys of the AlCoCrCuFeNi System with Different Contents of Al and Cr Produced by Ultrasonic Treatment in a Ball Mill

A. O. Perekos, B. N. Mordyuk, V. Z. Voynash, V. V. Bondar, Ye. O. Svystunov, D. L. Vashchuk, S. Yu. Makarenko, T. G. Kabantsev

G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 26.07.2021; final version - 16.12.2021. Download: PDF

For the first time, ultrafine powders (UFP) of high-entropy alloys (HEA) of the AlCoCrCuFeNi system are produced by ultrasonic milling of the coarse-grained powder mixture of aluminium, iron, cobalt, copper, nickel and chromium in a ball mill. X-ray analysis, Mössbauer spectroscopy and magnetic measurements shows that the phase composition and magnetic properties of UFP are affected by the aluminium and chromium contents. These investigations have shown that all UFPs produced by ultrasonic milling are in high-entropy state and contain two solid solutions with f.c.c. and b.c.c. lattices. Both the quantity of b.c.c. phase and magnitude of specific saturation magnetization of UFPs depend on the aluminium and chromium contents in the original powder mixture. Ferromagnetism of the obtained UFPs is shown to be mainly due to the presence of b.c.c. phase.

Key words: high-entropy alloys, ultrasonic milling, ultrafine powders, X-ray analysis, Mössbauer spectroscopy, magnetic measurements.

URL: https://mfint.imp.kiev.ua/en/abstract/v44/i03/0311.html

DOI: https://doi.org/10.15407/mfint.44.03.0311

PACS: 43.35.+d, 61.05.cp, 65.40.gd, 81.07.Wx, 81.20.Ev, 81.40.Rs

Citation: A. O. Perekos, B. N. Mordyuk, V. Z. Voynash, V. V. Bondar, Ye. O. Svystunov, D. L. Vashchuk, S. Yu. Makarenko, and T. G. Kabantsev, Structure, Phase Composition and Magnetic Properties of Ultrafine Powders of High-Entropy Alloys of the AlCoCrCuFeNi System with Different Contents of Al and Cr Produced by Ultrasonic Treatment in a Ball Mill, Metallofiz. Noveishie Tekhnol., 44, No. 3: 311—326 (2022) (in Ukrainian)

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