CuS/ZnS纳米复合材料的制备及其作为润滑油添加剂的摩擦学行为研究

Preparation of CuS/ZnS nanocomposites and investigation of its tribological behavior as additive in lubricating oils

采用水热法制备了CuS/ZnS纳米复合材料,利用XRD、SEM等仪器对其结构进行了表征。结果表明:所制备的CuS/ZnS纳米复合材料呈微球结构,具有较细的颗粒尺寸和良好的分散性。采用四球摩擦试验机考察了所制样品作为添加剂在基础油中的摩擦性能,利用SEM和光学显微镜观察了摩擦钢球表面磨痕形貌和磨斑直径大小,同时使用EDS对钢球表面典型元素进行测试,分析纳米材料对基础油摩擦学性能的影响机理。结果表明,加人CuS/ZnS的混合润滑油比基础油的摩擦系数和磨斑大小分别降低了30%和22%,表现出良好的减摩抗磨性能。EDS的结果表明,所制备的纳米复合材料在钢球表面形成了一层润滑膜,减少了摩擦副之间的直接接触。

CuS/ZnS nanocomposites were prepared by hydrothermal method,and characterized by XRD and SEM.The results indicate that the prepared CuS/ZnS nanocomposites have a microsphere structure,fine particle size and good dispersion.Tribological properties of nanoparticles as additives in base oils were investigated using a lever four-ball friction wear tester,scanning electron microscope(SEM)and optical microscopy were used to observe the abrasion mark morphology and the size of abrasion spot diameters on the surface of friction steel balls,and typical elements on the surface of the steel ball were tested using energy spectrometry(EDS)at the same time,and the mechanism of the influence of nanomaterials on the tribological properties of the base oil was analyzed.The results show that the prepared CuS/ZnS nanocomposites have a microsphere structure,fine particle size and good dispersion.The friction test shows that the friction coefficient and wear spot size of CuS/ZnS mixed lubricating oil are reduced by 30%and 22%respectively compared with the base oil,showing the best friction reduction and anti-wear performance.The results of EDS show that the prepared nanocomposites form a layer of lubricating film on the surface of the steel ball,reducing the direct contact between the friction pair.