期刊
TRIBOLOGY LETTERS
卷 67, 期 3, 页码 -出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-019-1211-6
关键词
Cu-Ti3AlC2 composites; Contact voltage drop; Wear rate; Friction coefficient; Lubricating film
资金
- National Natural Science Foundation of China [51571078, 51871085]
- Natural Science Foundation of Anhui Province [1808085 ME122, 1908085 QE218]
The effect of Ti3AlC2 content on electrical friction and wear behaviors of Cu-Ti3AlC2 composites is investigated. Composites with different volume ratios of Ti3AlC2 are prepared by the hot-pressing method, and experiments are performed on a block-on-ring sliding electrical wear tester. The results demonstrate that with increasing Ti3AlC2 content, the contact voltage drops of the Cu-Ti3AlC2 composites increase, the friction coefficient decreases, and the wear rate initially decreases and then increases. A lubricating film forms on the worn surface during the process of electrical sliding wear, which improves the wear resistance of the material. Raman spectroscopy and X-ray photoelectron spectroscopy spectra of the worn surface show that the lubricating film comprises Ti3AlC2, CuO, TiO2 and Al2O3, where the TiO2 and Al2O3 result from decomposition of Ti3AlC2.
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