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Advances in Materials Science and Engineering
Volume 2018, Article ID 8150791, 12 pages
Research Article

Preparation of a Self-Lubricating Cu/h-BN Coating on Cemented Carbide

College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, Shandong, China

Correspondence should be addressed to Tongkun Cao; moc.361@ktoac

Received 23 June 2018; Revised 4 November 2018; Accepted 11 November 2018; Published 6 December 2018

Academic Editor: Massimiliano Barletta

Copyright © 2018 Tongkun Cao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this work, a Cu/h-BN self-lubricating coating was prepared on cemented carbide by electrospark deposition (ESD). The microstructure and properties of the coating were examined. The results showed that no decomposition of or reactions with h-BN occurred. As the h-BN content and capacitance increased, the number of pores and microcracks in the coatings increased. Additionally, as the capacitance increased, the electrode mass loss increased. However, the specimen mass increased first and then decreased. The coating thickness was affected by the capacitance, deposition time, and volume ratio of h-BN to Cu. The results exhibited were consistent over the tests. The self-lubricating coating exhibited excellent tribological behavior under the test conditions, and the worn surface showed features consistent with shear slippage and abrasive wear.