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Study on Microstructure and Tribological Performance of Diamond/Cu Composite Coating via Supersonic Laser Deposition

by Lijuan Wu 1,2, Gang Zhang 1,2, Bo Li 1,2, Weilin Wang 1,2, Xuanjie Huang 1,2, Zhijun Chen 1,2, Gang Dong 1,2, Qunli Zhang 1,2,* and Jianhua Yao 1,2
1
Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou 310023, China
2
Collaborative Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou 310023, China
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(3), 276; https://doi.org/10.3390/coatings10030276
Received: 15 February 2020 / Revised: 7 March 2020 / Accepted: 8 March 2020 / Published: 17 March 2020
The supersonic laser deposition (SLD) of diamond/Cu composite powder is studied over a range of laser power. The deposition efficiency, coating microstructure, cohesive/adhesive bonding, phase composition, micro-hardness, and tribological property of the diamond/Cu composite coating are investigated. The results indicate that, as laser power is increased, deposition efficiency initially increases and then declines. The diamond particles distribute uniformly in the composite coating. Due to the increase of velocity ratio and total energy by laser irradiation, the cohesive/adhesive bonding of the composite coating is improved. The composite coating can preserve the phase composition of the origin powders due to the relatively low heat input during the SLD process. Slight oxidation of the Cu powder can be detected in the coatings prepared with high laser power, which has adverse effects on material deposition. The SLD-diamond/Cu composite coating has superior wear-resistance because of low friction coefficient, high micro-hardness, and uniformly distributed diamond particles. View Full-Text
Keywords: supersonic laser deposition; diamond composite coating; deposition efficiency; cohesive/adhesive bonding; tribological performance supersonic laser deposition; diamond composite coating; deposition efficiency; cohesive/adhesive bonding; tribological performance
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Wu, L.; Zhang, G.; Li, B.; Wang, W.; Huang, X.; Chen, Z.; Dong, G.; Zhang, Q.; Yao, J. Study on Microstructure and Tribological Performance of Diamond/Cu Composite Coating via Supersonic Laser Deposition. Coatings 2020, 10, 276.

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