Ni–SiC composite coatings were successfully deposited on interior surfaces of cylinders by circulating-solution electrodeposition (CSD) technique on a newly-designed composite electroplating apparatus. The circulating-solution agitation was effective to improve the dispersibility of SiC particles. The morphology, microstructure, hardness and tribological performances of Ni–SiC composite coatings varying SiC content were studied. Results showed that the dominant wear mechamism was oxidative wear, accompanied by abrasive wear. The friction coefficient and wear rate decreased with increasing SiC content. The excellent wear resistance was attributed to the existence of (111) growth twins, the improved hardness, the protections from NiO layer and SiC reinforcements, and the friction-induced microstructure changes underneath the tribo-surface. The protective capability of NiO layer and micro-SiC particles were discussed in detail.

在新设计的复合电镀设备上，通过循环溶液电沉积（CSD）技术成功地将Ni-SiC复合涂层沉积在圆柱体的内表面上。循环溶液搅拌有效地改善了SiC颗粒的分散性。研究了不同SiC含量的Ni-SiC复合涂层的形貌，显微组织，硬度和摩擦学性能。结果表明，主要的磨损机理是氧化磨损，并伴有磨料磨损。摩擦系数和磨损率随SiC含量的增加而降低。优异的耐磨性归因于（111）生长孪晶的存在，提高的硬度，对NiO层和SiC增强材料的防护以及在摩擦表面下由摩擦引起的微观结构的变化。