Jianjun Wang, Kai Tian, Zhijun Chen, Bo Li, Gang Zhang, Qunli Zhang, Jianhua Yao. Microstructure and Wear Resistance of Graphite/Cu Composite Coating Prepared by Supersonic Laser Deposition[J]. Chinese Journal of Lasers, 2021, 48(18): 1802015
- Chinese Journal of Lasers
- Vol. 48, Issue 18, 1802015 (2021)
Fig. 1. Micro-morphologies of deposited powders. (a) Cu powder; (b) Cu-coated graphite powder
Fig. 2. Schematic diagram of SLD system
Fig. 3. Cross-sectional morphologies of composite coatings with different graphite contents and morphologies of joints between composite coatings and substrates when the laser irradiation power is 600 W. (a)(b) CuGr5; (c)(d) CuGr10; (e)(f) CuGr15
Fig. 4. XRD diffraction patterns for coatings with different graphite contents and Cu-coated graphite powder
Fig. 5. SEM images of cross sections of CuGr10 coating. (a) Middle of coating; (b) joint between coating and substrate
Fig. 6. Microstructures and element distributions of composite coatings with different graphite contents. (a) CuGr5; (b) CuGr10; (c) CuGr15
Fig. 7. Microhardnesses of substrate and composite coatings with different graphite contents
Fig. 8. (a) Friction coefficient curves and (b) mass losses of substrate and composite coatings with different graphite contents
Fig. 9. (a) Wear profiles and (b) wear rates of substrate and composite coatings with graphite contents
Fig. 10. Morphologies of worn surfaces of substrate and composite coatings with different graphite contents. (a1) Cu substrate; (b1) CuGr0; (c1) CuGr5; (d1) CuGr10; (e1) CuGr15; (a2)--(e2) enlarged images of areas in the dotted boxes in Figs. 10 (a1)--(e1)
Fig. 11. EDS analysis results of worn surfaces of composite coatings with different graphite contents. (a) CuGr0; (b) CuGr5; (c) CuGr10
Fig. 12. Raman spectra of abrasive surfaces of composite coatings with different graphite contents
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Table 1. Process parameters for graphite/Cu composite coating prepared by SLD system
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