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

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Transactions of Nonferrous Metals Society of China

Vol. 22    No. 1    January 2012

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Tribological behavior of CNTs−Cu and
graphite−Cu composites with electric current
XU Wei1, 2, HU Rui1, LI Jin-shan1, ZHANG Yong-zhen3, FU Heng-zhi1

1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. Engineering School, Shanxi Datong University, Datong 037003, China;
3. Laboratory of Material Tribology, Henan University of Science and Technology, Luoyang 471003, China

Abstract:CNTs−Cu and graphite−Cu composites were separately prepared by powder metallurgy technique under the same consolidation processing. Tribological behavior of the composites with electric current was investigated by using a pin-on-disk friction and wear tester. The results show that the friction coefficient and wear rate of the composites decrease with increasing the reinforcement content, and increase with increasing the electric current density; the effects of electric current are more obvious on tribological properties of graphite−Cu composites than on CNTs−Cu composites; for graphite−Cu composites the dominant wear mechanisms are electric arc erosion and adhesive wear, while for CNTs−Cu composites are adhesive wear.


Key words: Cu matrix composite; tribological behaviors; electric current; wear mechanisms

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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