Microstructure and Wear Resistance of Ni-nano TiC-GO Composite Coatings Based on Single Pulsed Electrodeposition
REN Xin1,*, WANG Haoxin1, SUN Tao1, WANG Gang1, MENG Chao1, QIU Xingwu2
1 School of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China 2 Multicomponent Alloys Key Laboratory of Deyang City, Sichuan College of Architectural Technology, Deyang 618000, Sichuan, China
Abstract: In this study, a new type of Ni-based antifriction and wearable ternary composite coating was prepared on the surface of Q235 steel by single pulse electrodeposition technology. Firstly, the best GO addition was determined by studying the effect of the concentration of graphene oxide (GO) on the morphology, plating rate and hardness of Ni-nano TiC-based composite coating. Then, the structure of ternary composite coating was characterized by X-ray diffraction (XRD), Raman spectroscopy (Raman) and X-ray photoelectron spectroscopy (XPS). Finally, the hardness and wear resistance of ternary composite coating were studied by comparing with Ni-nano TiC composite coating. The results show that the optimal mass concentration of GO in the plating solution is 200 mg/L. At this time, the surface of Ni-nano TiC-GO composite coating is uniform and dense, and the roughness value Ra is 3.087 μm. XRD and Raman spectra results show that nano TiC and GO are successfully incorporated into Ni-based coatings. The hardness of Ni-nano TiC-GO composite coating is 726.3HV, about 1.5 times that of Ni-nano TiC compo-site coating (463.8HV). The average friction coefficient of Ni-nano TiC-GO composite coating is 0.108, which has better friction reduction and wear resistance than Ni-nano TiC composite coating (0.285).
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2024, Vol. 38 
