Source: https://mfint.imp.kiev.ua/en/abstract/v40/i11/1539.html
Timestamp: 2019-04-26 03:39:42+00:00

Document:
The Al, Cu, Fe and Sn powders obtained by means of the method of electrospark dispersion in different dielectric mediums such as distilled water, ethanol, kerosene and glycerine are investigated. Influence of the physicochemical and kinetics factors on granulometric composition of powders is studied by optical granulometry method and x-ray analysis. As revealed, a particle size distribution depends on time of dispersion process, intermingling of working liquid, ultrasonic treatment of suspension, and mechanical treatment of powders. The physical parameters of working liquid and electrode material do not determine granulometric composition of powders; there is their influence on kinetics of a particles size rise during a fabrication process only. As shown, change of powder dispersion characteristics is determined by processes of agglomeration and aggregation of fine-grained particles in working liquid as well as factors influencing on these processes.
Key words: electrospark dispersion of metals, superfine particles, optical granulometry, x-ray analysis, particle size distribution.
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