Zhong Haoyu, Fang Cong, Lei Weining, Xv Tianle, He Bin, Kong Linglei, He Yiliang
School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China.
Jiangsu Key Laboratory of Advanced Material Design and Additive Manufacturing, Jiangsu University of Technology, Changzhou 213001, China.
Materials (Basel). 2024 Sep 20;17(18):4620. doi: 10.3390/ma17184620.
The Ni-GQDs composite plating was created using direct current (DC), single-pulse, and double-pulse power supplies, with GQDs serving as additives under supercritical CO conditions. A comparative analysis was conducted to evaluate the effects of different electrodeposition power sources on the microstructure and properties of the Ni-GQDs composite plating. High-Resolution Transmission Electron Microscopy (HRTEM) was employed to investigate the distribution of GQDs within the composite plating as well as to analyze d-spacing and diffraction patterns. Scanning Electron Microscopy (SEM) was utilized to illustrate the surface morphology of the plating and assess its surface quality. The grain size and preferred orientation of the plated layer were examined using X-ray Diffraction (XRD), while Atomic Force Microscopy (AFM) was used to evaluate the roughness of the surface. To compare the abrasion resistance of the various plating types, wear amounts and friction coefficients were measured through friction and wear tests. Additionally, corrosion resistance tests were performed to assess the corrosion resistance of each plating variant. The results indicate that the Ni-GQDs-III composite layers produced via double-pulse electrodeposition exhibit superior surface quality, characterized by smaller grain sizes, enhanced surface flatness, reduced surface roughness, and improved resistance to wear and corrosion.
在超临界二氧化碳条件下，以石墨烯量子点（GQDs）为添加剂，分别使用直流（DC）电源、单脉冲电源和双脉冲电源制备了镍-石墨烯量子点复合镀层。通过对比分析，评估了不同电沉积电源对镍-石墨烯量子点复合镀层微观结构和性能的影响。采用高分辨率透射电子显微镜（HRTEM）研究了复合镀层中石墨烯量子点的分布情况，并分析了其晶面间距和衍射图案。利用扫描电子显微镜（SEM）观察了镀层的表面形貌并评估其表面质量。通过X射线衍射（XRD）检测了镀层的晶粒尺寸和择优取向，同时使用原子力显微镜（AFM）评估了表面粗糙度。通过摩擦磨损试验测量磨损量和摩擦系数，以比较不同镀层的耐磨性。此外，还进行了耐腐蚀性能测试，以评估每种镀层变体的耐腐蚀性能。结果表明，通过双脉冲电沉积制备的镍-石墨烯量子点-III复合镀层具有优异的表面质量，其特征在于晶粒尺寸更小、表面平整度更高、表面粗糙度更低，以及耐磨性和耐腐蚀性得到改善。
