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Impact of high-energy effects on the formation of internal structure in copper particles

Authors
  • Chesnokov, A. E.1
  • Smirnov, A. V.1
  • Vidyuk, T. M.1, 2
  • 1 Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia , Novosibirsk (Russia)
  • 2 Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk, Russia , Novosibirsk (Russia)
Type
Published Article
Journal
Thermophysics and Aeromechanics
Publisher
Kutateladze Institute of Thermophysics SB RAS
Publication Date
Jul 01, 2020
Volume
27
Issue
4
Pages
607–614
Identifiers
DOI: 10.1134/S0869864320040137
Source
Springer Nature
Keywords
License
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Abstract

In the present paper, results of a study of the impact of high-energy effects on the surface morphology and on the formation of the internal structure in PMS-1 copper particles are reported. It is shown that the mechanical milling of the copper powder in a planetary mill leads to the formation of powder agglomerates with a layered structure consisting of numerous deformed ultrafine particles. It is found that the volume of the agglomerated particles involves the defects in the form of microcracks and closed micropores with some content of the initial gas. Subsequent treatment of the powder in an argon-helium plasma jet leads to the formation of dense particles as well as particles with distributed gas volumes or a single cavity. It was found that, as the molten metal interacted with localized gas volumes during the plasma treatment, local oxidation of the material occurred. A dispersion-strengthened structure with copper oxide compounds of a predominantly round shape, ranging in size from tens of nanometers to 7 µm and uniformly distributed over the particle volume, was formed.

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