Effect of Surface State of Electric-Spark Particles on Solid Solution Formation during Ultrasonic Ball Milling of Copper–Cobalt and Copper

Issues » Volume 42, Issue 2

Effect of Surface State of Electric-Spark Particles on Solid Solution Formation during Ultrasonic Ball Milling of Copper–Cobalt and Copper–Iron Ultrafine-Grained Powder Blends

A. Ye. Perekos, B. M. Mordyuk, V. V. Bondar, V. Z. Voynash, T. V. Efimova, V. P. Zalutskiy, T. G. Kabantsev

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

Received: 10.07.2019; final version - 03.10.2019. Download: PDF

The influence of ultrasonic ball milling (USBM) on structural-phase characteristics and magnetic properties of ultra-fine powder mixtures (UFPMs) of copper with iron (Cu + Fe) and cobalt (Cu + Co) is investigated by X-ray analysis and magnetic methods. Powder mixtures are formed from ultra-fine powders, obtained by electric-spark method in the distilled water. As shown, USBM of UFPMs (Cu + Co and Cu + Fe) results in the decrease of the volume fractions of Cu–Co and Cu–Fe ferromagnetic phases and in the increase of oxides fractions. As also shown, the metals’ concentrations in the Cu–Co and $\alpha$-Fe–Cu solid solutions remain almost unchanged, but the dispersity of almost all phase components is increased. After USBM, the magnetic properties are changed accordingly to the phase state and dispersity of UFPMs. As assumed, the mentioned peculiarities of structural-phase characteristics after USBM are caused by the presence of oxide and carbide coatings on the particles’ surfaces.

Key words: electric-spark treatment, ultra-fine powder mixtures, ultrasonic grinding, mechanical melting, X-Ray analysis, magnetic measurements.

URL: http://mfint.imp.kiev.ua/en/abstract/v42/i02/0197.html

DOI: https://doi.org/10.15407/mfint.42.02.0197

PACS: 75.50.Tt, 75.75.Cd, 81.07.Wx, 81.20.Ev, 81.20.Wk, 81.40.Rs

Citation: A. Ye. Perekos, B. M. Mordyuk, V. V. Bondar, V. Z. Voynash, T. V. Efimova, V. P. Zalutskiy, and T. G. Kabantsev, Effect of Surface State of Electric-Spark Particles on Solid Solution Formation during Ultrasonic Ball Milling of Copper–Cobalt and Copper–Iron Ultrafine-Grained Powder Blends, Metallofiz. Noveishie Tekhnol., 42, No. 2: 197—213 (2020) (in Ukrainian)

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