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http://dx.doi.org/10.7844/kirr.2016.25.6.92

Spherodization of Granuled Cr2O3 Fine Ceramic Powder by Plasma Spray  

Lee, Dong Won (Materials Implementation Department, Korea Institute of Materials Science)
Lee, Hak Sung (Materials Modeling and Characterization Department, Korea Institute of Materials Science)
Yu, Ji-Hun (Powder Technology Department, Korea Institute of Materials Science)
Wang, Jei-Pil (Department of Metallurgical Engineering, Pukyong National University)
Publication Information
Resources Recycling / v.25, no.6, 2016 , pp. 92-97 More about this Journal
Abstract
Spray dried $Cr_2O_3$ powder having an agglomerated structure of particles was twice treated into a plasma flame to increase its apparent density. The powder subjected to the first densification treatment did not show the entirely melted state keeping inner particle hollows, and it was fully melted after the second processing only. The powder size as a result of the second treatment decreased, and the apparent density as well as flowability were increased due to melting and surface smoothing effects. But a part of particles after the second densified treatment showed the hollow structure, especially those which were above $30{\mu}m$ in size. This densification behavior of the powder has been qualitatively discussed in terms of the thermal conductivity and inner gas pressure within aggregates exposed to the plasma flame.
Keywords
$Cr_2O_3$; Plasma frame; Apparent density; Densification;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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