Open AccessFormation of the internal structure of copper particles during their ball milling followed by spheroidization
Author(s) -
А. В. Смирнов,
А. А. Чесноков,
T. M. Vidyuk
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1404/1/012045
Subject(s) - copper , agglomerate , ball mill , materials science , metallurgy , particle (ecology) , penetration (warfare) , particle size , copper oxide , volume (thermodynamics) , composite material , chemical engineering , oceanography , physics , operations research , quantum mechanics , engineering , geology
The paper presents the results of a study of the influence of high-energy effects on surface morphology and the formation of the internal structure of copper particles. It is shown that the ball milling of copper powder in a planetary mill leads to the formation of layered agglomerates consisting of many deformed ultrafine particles. It is noted that defects in the form of microcracks and micropores are observed in the volume of the agglomerated particle. Their subsequent treatment in a plasma jet leads to the formation of spherical particles. It is established that during the interaction of the molten material of a particle with distributed gas inclusions throughout the particle’s volume during plasma treatment, local copper oxidation occurs. Copper oxide inclusions of predominantly rounded shape are formed, ranging in size from tens of nanometers to 7 microns, uniformly distributed over the particle volume.