地面模拟空间环境下磷酸盐涂层的摩擦学行为

Tribological Behavior of Phosphate Coatings in Ground-Based Simulation Environment

针对有机类固体润滑防护涂层长期暴露在空间环境下涂层表面降解、致密性下降、润滑作用失效等问题,设计开发了改性磷酸盐黏结固体润滑防护涂层。通过地面模拟空间综合环境设备系统,分析了改性磷酸盐黏结固体润滑防护涂层在长时间紫外、原子氧、高能质子和电子辐照后的结构变化和真空摩擦学性能。结果表明:紫外和高能粒子辐照对改性磷酸盐黏结固体润滑涂层的力学和真空摩擦磨损性能均无影响;原子氧对涂层表面的二硫化钼具有一定的氧化作用,但并未影响涂层的摩擦磨损性能,涂层经过各种辐照后仍然表现出良好的润滑作用。该涂层有望应用于航天飞行器相关运动部件的润滑与防护。

In view of the problems such as the surface degradation,the density decrease,and the lubrication failure of organic solid lubrication protective coatings after they have been exposed to the space environment for a long time,a modified phosphate bonded solid lubricating coating is designed and developed.The structural changes and the vacuum tribological properties of the modified phosphate bonded solid lubricating coatings before and after long time ultraviolet,atomic oxygen,high-energy proton,and electron irradiation are analyzed based on ground-based simulation facilities.The results show that the ultraviolet irradiation and the high-energy particle irradiation have no effect on the mechanical and vacuum tribological properties of the modified phosphate coatings;the atomic oxygen irradiation has a certain oxidation effect on the molybdenum disulphide of the coating surface,but does not affect the tribological properties.After various irradiation,the coatings still have good lubrication.The present developed phosphate coating has a promising prospect in the lubrication and protection of relevant moving parts of space vehicles.