标题
作者
作者:Lu, ZC (Lu, Z. C.)[1,3 ]; Zeng, MQ (Zeng, M. Q.)[2,3 ]; Gao, Y (Gao, Y.)[2,3 ]; Xing, JQ (Xing, J. Q.)[2,3 ]; Zhu, M (Zhu, M.)[2,3 ]
期刊信息
摘要
In this work, an attempt was made to further promote the wear and friction behavior of dual-scale structured Al-12 w% Sn bearing alloys by coupling with a nano-Si@Sn composite. A so-called tri-modal Al-Sn-Si (denoted as CG-30 Si-containing alloy), which exhibited increased bulk hardness and improved distribution and refinement of the Sn phase, was produced by combining mechanical alloying and conventional powder sintering. The wear performance of the Si-containing and Si-free alloys was differentiated by performing both block-on-ring and ball-on-disk testing. Moreover, the addition of nano-Si@Sn composites to the dual-scale Al-Sn matrix resulted in significant reductions of the friction coefficient and wear volume. These improvements in wear behavior stemmed from the polishing effect of fine Si particles on the counterface, and Sn-rich clusters that acted as lubricants on the worn surface; together, the polishing effect and lubrication led to the formation of a smooth tribolayer, and hence, a decrease in the tendency for abrasive wear. Abrasive wear was also reduced by an increase in the alloy hardness with the addition of Si. As such, Sn-phase modification via Si addition constitutes a promising method for preparing self-lubricating Al-based alloys. (C) 2015 Elsevier B.V. All rights reserved.
关键词
作者关键词:Sliding wear; Non-ferrous metals; Tribochemistry; Bearings
作者信息
通讯作者地址:Zhu, M (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China. |
地址:
电子邮件地址:memzhu@scut.edu.cn
出版商
类别分类
研究方向:Engineering; Materials Science
Web of Science 类别:Engineering, Mechanical; Materials Science, Multidisciplinary