Yan Yutao, Lu Lifeng, Huo Yuqiu
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Department of Chemistry, College of Science, Northeastern University, Shenyang 110819, China.
Materials (Basel). 2022 Apr 12;15(8):2834. doi: 10.3390/ma15082834.
Electrodeposition has attracted tremendous interest in functional coatings due to its advantages of high efficiency, inexpensiveness and ease of implementation. In this work, nickel graphene oxide (Ni-GO), nickel silicon carbide (Ni-SiC) and nickel graphene oxide/silicon carbide (Ni-GO/SiC) composite coatings were electrodeposited on the 2218 aluminum alloy (2218AlA) substrate. The microstructure, microhardness, bonding strength and tribological behaviors of the composite coatings were carried out. According to the results obtained, the composite coatings were dense and compact, with no visible defects and microcracks, and well bonded to 2218AlA substrate. The microhardness of composite coatings was significantly increased compared to that of the 2218AlA substrate. The microhardness of Ni-SiC composite coating was the highest, reaching 3.14 times that of the 2218AlA substrate. The friction response time, friction coefficient and wear rate of the composite coatings were obviously lower. For the Ni-GO composite coating, the average friction coefficient is the smallest at 45.35% of the 2218AlA substrate, while the wear rate is the smallest at 46.97% of the 2218AlA substrate. However, the comprehensive tribological performances of the Ni-GO/SiC composite coating were superior. The abrasive and adhesive wear were the main wear mechanisms of composite coatings, but the degree of damage was different.
由于具有高效、廉价和易于实施等优点，电沉积在功能性涂层方面引起了极大的关注。在这项工作中，在2218铝合金（2218AlA）基体上通过电沉积制备了氧化镍石墨烯（Ni-GO）、镍碳化硅（Ni-SiC）和氧化镍石墨烯/碳化硅（Ni-GO/SiC）复合涂层。对复合涂层的微观结构、显微硬度、结合强度和摩擦学行为进行了研究。根据所得结果，复合涂层致密且紧凑，没有明显的缺陷和微裂纹，并且与2218AlA基体结合良好。与2218AlA基体相比，复合涂层的显微硬度显著提高。Ni-SiC复合涂层的显微硬度最高，达到2218AlA基体的3.14倍。复合涂层的摩擦响应时间、摩擦系数和磨损率明显更低。对于Ni-GO复合涂层，平均摩擦系数最小，为2218AlA基体的45.35%，而磨损率最小，为2218AlA基体的46.97%。然而，Ni-GO/SiC复合涂层的综合摩擦学性能更优。磨粒磨损和粘着磨损是复合涂层的主要磨损机制，但损伤程度不同。
