APPLIED LASER, Volume. 42, Issue 3, 77(2022)
Study on Laser-assisted Low Pressure Cold Spraying of Graphite/Cu Composite Coating
Graphite/Cu composite coatings were prepared by laser-assisted low pressure cold spraying at different laser power. The cross-sectional morphology, surface morphology, microstructure, graphite content and element distribution of the composite coatings were characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and image analysis software ImageJ. Results show that the continuous coating cannot be formed by single low pressure cold spraying, and the effective deposition of graphite/Cu composite coating can be achieved by laser-assisted low pressure cold spraying. With the increase of laser power, the thickness and width of the composite coating are improved to a certain extent, and the surface undulation and interfacial bonding between the coating and substrate are improved. In the composite coating prepared by laser-assisted low-pressure cold spraying, the bonding between reinforcement phase graphite and bonding phase Cu is intimate, but too high laser power can easily lead to the problems of ablation of reinforcement phase graphite and oxidation of bonding phase Cu.
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Zhang Yunyi, Liu Bo, Tian Kai, Zhang Gang, Li Bo, Zhang Qunli, Yao Jianhua. Study on Laser-assisted Low Pressure Cold Spraying of Graphite/Cu Composite Coating[J]. APPLIED LASER, 2022, 42(3): 77
Received: Apr. 14, 2021
Accepted: --
Published Online: Jan. 3, 2023
The Author Email: Yunyi Zhang (532968735@qq.com)