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以TC4钛合金为基体制备出Ni-P-MoS2化学复合镀层,分析了pH值、MoS2微粒浓度以及表面活性剂种类、浓度对复合镀层耐磨性能的影响,并观察了镀层磨损后的形貌。结果表明:复合镀层的耐磨性随镀液中MoS2颗粒浓度和pH值的升高先增强后减小。在MoS2颗粒浓度为2g/L和pH为6.0时,阳离子表面活性剂十六烷基三甲基溴化铵与阴离子表面活性剂十二烷基硫酸钠的共同作用能有效促进MoS2微粒与Ni-P合金的共沉积,在钛合金表面形成一层均匀的固体润滑膜,显著降低摩擦系数。镀层中MoS2粒子起到很好的固体自润滑作用,减小了粘着磨损的发生。
Ni-P-MoS2 electroless composite coating was prepared on the basis of TC4 titanium alloy. The effects of pH value, concentration of MoS2 particles and surfactant type and concentration on the wear resistance of the composite coating were analyzed. The morphology of the coating after wear was observed . The results show that the wear resistance of the composite coatings first increases and then decreases with the increase of the concentration of MoS2 particles and the pH value. When the concentration of MoS2 particles is 2g / L and pH is 6.0, the interaction of cationic surfactant cetyltrimethylammonium bromide and anionic surfactant sodium dodecyl sulfate can effectively promote the interaction between MoS2 particles and Ni- P alloy co-deposition, the titanium alloy surface to form a uniform layer of solid lubricating film, significantly reducing the friction coefficient. MoS2 coating particles play a good solid self-lubricating effect, reducing the occurrence of adhesive wear.