A systematic investigation of the mechanochemical decomposition of Ag oxalate in rod drop experiments

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• 作者：Giorgio Ligios ; Andrea Manuello Bertetto ; Francesco Delogu ; ^{francesco.delogu@dimcm.unica.it}
• 关键词：Impact behavior ; Decomposition ; Plastic deformation ; Kinetics
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：25 March, 2013
• 年：2013
• 卷：554
• 期：Complete
• 页码：426-431
• 全文大小：725 K

文摘

The present work focuses on the chemical response of Ag oxalate powders to the collision of rods in controlled rod drop experiments performed by using suitably designed reactors. Powder layers of different thickness were submitted to the collision of cylindrical rods with selected radius, mass, and collision velocity. The experimental findings indicate that collisions are able to induce the partial decomposition of Ag oxalate into metallic Ag and gaseous carbon dioxide. The mass of Ag oxalate decomposed is proportional to the collision energy. Being the impact energy the same, the mass decomposed is inversely proportional to the surface area of the powder layer. In addition, it increases irregularly as the thickness of the powder layer increases. The results obtained suggest that rod drop experiments can be profitably used to promote and investigate mechanochemical transformations.