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Author Guzman, D.; Aguilar, C.; Rojas, P.; Criado, J.M.; Dianez, M.J.; Espinoza, R.; Guzman, A.; Martinez, C.
Title Production of Ag-ZnO powders by hot mechanochemical processing Type
Year 2019 Publication Transactions of Nonferrous Metals Society of China Abbreviated Journal T. Nonferr. Metal. Soc.
Volume 29 Issue 2 Pages 365-373
Keywords Ag-ZnO; nanocomposite; electrical contact material; powder synthesis; milling
Abstract Ag-CdO composites are still one of the most commonly used electrical contact materials in low-voltage applications owing to their excellent electrical and mechanical properties. Nevertheless, considering the restriction on using Cd due to its toxicity, it is necessary to find alternative materials that can replace these composites. In this study, the synthesis of Ag-ZnO alloys from Ag-Zn solid solutions was investigated by hot mechanochemical processing. The hot mechanochemical processing was conducted in a modified attritor mill at 138 degrees C under flowing O-2 at 1200 cm(3)/min for 3.0 h. The microstructure and phase evolution were investigated using X-ray diffractometry, field emission gun scanning electron microscopy and transmission electron microscopy. The results suggest that it is possible to complete the oxidation of Ag-Zn solid solution by hot mechanochemical processing at a low temperature and short time. This novel synthesis route can produce Ag-ZnO composites with a homogeneous distribution of nanoscale ZnO precipitates, which is impossible to achieve using the conventional material processing methods. Considering the fact that the fundamental approach to improving electric contact material performance resides in obtaining uniform dispersion of the second-phase in the Ag matrix, this new processing route could open the possibility for Ag-ZnO composites to replace non-environmentally friendly Ag-CdO.
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Language Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 1003-6326 ISBN Medium
Area Expedition Conference
Notes WOS:000460293100015 Approved
Call Number UAI @ alexi.delcanto @ Serial 1404
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