FeCrBSi/FeS层真空辐照环境下的组织结构与摩擦学性能研究

Growth and Tribological Property of FeCrBSi/FeS Layers in Space Radiation Environment

采用超音速等离子喷涂+低温离子渗硫技术在45#钢基体上制备了FeCrBSi/FeS复合涂层,考察了该复合涂层在大气、真空、原子氧辐照、紫外线辐照后的表面形貌、磨痕形貌及元素组成。利用真空摩擦磨损试验机分别完成了干摩擦条件下四种环境中的摩擦磨损性能测试。结果表明:复合FeCrBSi/FeS层经过原子氧及紫外线辐照后,有部分元素被氧化及化合物分解的现象,但并没有发生明显的材料性能改变以及润滑涂层的破坏。与45#钢相比,四种环境下该复合涂层均具有良好的润滑减摩效果。此研究表明,复合FeCrBSi/FeS层具有一定的抗原子氧和紫外线辐照的能力。

The FeCrBSi/FeS layers were deposited by supersonic velocity plasma spraying,on substrates of the quenched 1045 steel coated with sulfurized FeCrBSi films.The impacts of the deposition conditions were studied for film growth optimization.The microstructures and tribological property of the composite films,in environments of air,vacuum,oxygen irradiation,and ultra violet irradiation,were characterized with scanning electron microscopy,energy dispersive spectroscopy and conventional surface probes.The results show that the surface modification by coating FeCrBSi/FeS layers significantly improves its oxidation resistance and surface friction.No serious degradation of the coating and the lubrication layers,originated from the weak oxidation and decomposition of some constituents,was observed.Besides,the modified surface has a fairly high resistance against irradiations of UV and atomic oxygen.