Comparative Study of Mechanical Activation Improved by High Energy Ball Mills in Chromium Oxide Reduction

Abstract:

The processes of high-energy milling and gained importance among the unconventional methods. In this work, we seek to compare the power supply two types of high energy mills (vibratory mill (SPEX) and planetary mill) with the variation of the milling power. The millings were carried out with a mixture of chromium oxide and aluminum metalic. The reduction of chromium oxide does not occur instantaneously, but gradually as the progress of milling with mechanical activation of powders, this mechanical activation occurs leading to the solid state reaction occurs. The results were obtained for thermal analysis of the samples. The energy released varies, exhibiting a maximum mechanical activation for the range of powers milling studied. The correlation between the energy mills can be made by identifying the milling power is reached at which the maximum in each mechanical activation mill and quantifying this activation.

• Periodical: Materials Science Forum (Volume 802)
• Pages: 41-45
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.802.41
• Online since: December 2014
• Authors: Mauricio de Castro, Osvaldo Mitsuyuki Cintho, José Deodoro Trani Capocchi
• Keywords: Chromium Oxide, Mechanical Activation, Mechanical Alloying, Reduction Reaction

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