Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 29    No. 2    February 2019

[PDF Download]    [Flash Online]    

    

Production of Ag-ZnO powders by hot mechanochemical processing
D. GUZMáN1, C. AGUILAR2, P. ROJAS3, J. M. CRIADO4, M. J. DIáNEZ4, R. ESPINOZA5, A. GUZMáN1, C. MARTíNEZ6

1. Departamento de Ingeniería en Metalurgia, Universidad de Atacama, Av. Copayapu 485, Copiapó, Chile;
2. Departamento de Ingeniería Metalúrgica y de Materiales, Universidad Técnica Federico Santa María, Av. Espa?a 1680, Valparaíso, Chile;
3. Escuela de Dise?o, Universidad Adolfo Ibá?ez, Diagonal Las Torres 2640, Santiago, Chile;
4. Instituto de Ciencias de Materiales de Sevilla, C. S. I. C, Américo Vespucio 49, Isla de la Cartuja, Sevilla, Espa?a;
5. Departamento de Ciencia de los Materiales, Universidad de Chile, Av. Tupper 2069, Santiago, Chile;
6. Laboratorio de Corrosión, Instituto de Química, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2950, Valparaíso, Chile

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 °C under flowing O2 at 1200 cm3/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.

 

Key words: Ag-ZnO; nanocomposite; electrical contact material; powder synthesis; milling

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com