期刊
APPLIED SURFACE SCIENCE
卷 436, 期 -, 页码 1038-1049出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2017.12.138
关键词
Tribochemical wear; Surface analysis; Nanocrystalline composites; Self-healing
类别
资金
- National Basic Research Program of China [2014CB046705]
- China Postdoctoral Science Foundation [2016M600586]
- National Natural Science Foundation of China (NSFC) [51475190]
Self-healing can protect materials from diverse damages, but is intrinsically difficult in metals. This paper demonstrates a potential method through a simultaneous decomposition and oxidation of Ti3SiC2 to achieve healing of stress cracking on the surface of nickel aluminum bronze (NAB)/Ti3SiC2 nanocrystalline composites during fretting wear. At the finest nanocrystalline materials, a crack recovery would be attained at 76.5%. The repetitive fretting wear leads to a modest amount of 'flowability' of Ti3SiC2 toward the crack, facilitating crack recovery. Along with the wear-triggered self-healing, the NAB/Ti3SiC2 shows an improved tribological performance with the stable decreased friction torque due to the formation of lubrication TiO2 oxide. (C) 2017 Elsevier B.V. All rights reserved.
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