空间原子氧辐照对电刷镀Ni/MoS_2-C镀层组织结构及摩擦学性能的影响  

Effects of Space Atomic Oxygen Irradiation on the Structure and Tribological Properties of Ni/MoS_2-C Coating by Electricity Brush Plating

作　　者：李国禄[1] 王海斗[2] 徐滨士[2] 马国政[2] 张森[1,2] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《材料工程》2014年第2期24-28,共5页Journal of Materials Engineering

基　　金：国家杰出青年科学基金(51125023);国家973计划(2011CB013405);国家自然科学基金重大项目支持(3120001)

摘　　要：研究了空间原子氧对电刷镀Ni/MoS2-C固体润滑镀层的影响,通过SEM,EDS以及TEM观测了镀层的微观结构及成分,采用XRD确定了镀层的相结构,并利用MSTS-1多功能摩擦磨损试验机对比原子氧辐照不同时间后镀层摩擦学性能的变化情况。结果表明:原子氧对电刷镀Ni/MoS2-C复合镀层的氧化腐蚀作用明显,镀层中氧化产物MoO3增加,同时镀层表面氧化膜的存在使得其摩擦因数在实验初期阶段相对较低,镀层表面经一定能量的原子氧高速轰击后材料表面结构分布不均,进而在真空吸气作用下造成的应力变化导致微观裂纹数量增加且镀层致密性遭到一定程度的破坏,但氧化膜的存在有效地降低了镀层起始摩擦因数,原子氧的能量还不足以完全破坏Ni/MoS2-C镀层的摩擦学性能。The effects of space atomic oxygen （AO） on the electricity Ni/MoS2-C lubricating coating by electricity brush plating were discussed. The microstructures, compositions and phase structures of the coating were analyzed by SEM, EDS, TEM and XRD. The tribological properties of the coating under different time of AO irradiation were tested by MSTS-1 ultra-functional attrition testing ma- chine. The results show that the AO has an obvious oxidation corrosion effect on the coating and the content of MoO3 in the coating increases. Simultaneously, the friction coefficient is relatively low be- cause of the existence of thin oxide film in the early stage of experiment. The structure of the coating surface is inhomogeneity due to the high speed impact of AO. In such a case, the cracks of coating surface increase and the density of the coating gets some degree of damage due to the variation of stresses caused by vacuum suction effect. However, the friction coefficient is reduced effectively be- cause of the presence of thin oxide film. The energy of AO is not sufficient to completely destroy the tribological properties of Ni/MoS2-C coating.

关 键 词：复合物电刷镀 MoS2固体润滑膜 原子氧 氧化产物 摩擦学性能 

分 类 号：TH117[机械工程—机械设计及理论] TG356.16[金属学及工艺—金属压力加工]