Issues »  Volume 41, Issue 1

Electrospark Dispersion of Metal Materials. III. Influence of Processing Factors on the Sizes, the Form, and a Structural State of Superfine Particles

А. O. Perekos$^{1}$, A. I. Ustinov$^{2}$, S. M. Zakharchenkо$^{3}$, О. F. Bоytsоv$^{1}$, V. Z. Vоynаsh$^{1}$, V. P. Zаlutskyi$^{1}$

$^{1}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$E. O. Paton Electric Welding Institute, NAS of Ukraine, 11 Kazymyr Malevych Str., UA-03150 Kyiv, Ukraine
$^{3}$Institute of Electrodynamics, N.A.S. of Ukraine, 56 Peremohy Ave., UA-03057 Kyiv, Ukraine

Received: 06.12.2017. Download: PDF

Influence of processing factors on sizes, the form, and the structure of the fine-grained iron and copper particles obtained by electrospark dispersion in ethanol is studied by methods of x-ray analysis, electron microscopy, and optical granulometry. As revealed, electrospark powders consist of initial superfine particles formed by crystallization of molten-metal drops or condensation of metal vapour as well as of joining of primary particles because of agglomeration or aggregation. The final sizes of agglomerates and aggregates depend on particles’ concentration in a work liquid, particle precipitation rate and other factors. As shown, average particle size of crystallites and dislocations’ density in superfine particles depend on duration of dispersion process.

Key words: electrospark dispersion, superfine particles of metals, electron microscopy, optical granulometry, x-ray analysis.

URL: http://mfint.imp.kiev.ua/en/abstract/v41/i01/0101.html

DOI: https://doi.org/10.15407/mfint.41.01.0101

PACS: 52.80.Wq, 61.43.Gt, 61.46.Df, 62.23.St, 81.07.Bc, 81.07.Wx, 81.40.Cd

Citation: А. O. Perekos, A. I. Ustinov, S. M. Zakharchenkо, О. F. Bоytsоv, V. Z. Vоynаsh, and V. P. Zаlutskyi, Electrospark Dispersion of Metal Materials. III. Influence of Processing Factors on the Sizes, the Form, and a Structural State of Superfine Particles, Metallofiz. Noveishie Tekhnol., 41, No. 1: 101—120 (2019) (in Russian)

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