摘要
为了改善空间对接锁系在空间环境中的抗磨损和防冷焊性能,采用等离子体浸没离子注入与沉积技术在钛合金零部件表面制备类金刚石碳膜(DLC)。通过摩擦磨损试验、划痕试验、压痕试验来表征DLC膜的摩擦性能、膜-基结合力及显微硬度。结果表明,经复合强化制备的DLC膜摩擦系数低于0.15、磨损率为1.7×10-7mm3/N·m、膜-基结合力达256 mN、显微硬度为21 GPa,能够有效地提高航天用钛合金零件的使用性能。采用DLC膜和Braycote 601EF真空润滑脂的固体-油脂复合润滑方式来进一步改善DLC膜在空间应用性能,试验证实该项技术可满足空间对接锁系零部件的抗磨损、防冷焊需求。
A novel technique was developed to improve the wear resistance and cold-welding resistance of space docking latch system in space environment. In the newly-developed technique, the composite films coated Ti alloy parts were surface modified with diamond-like carbon（DLC）coatings, synthesized by plasma immersion ion implantation and deposition. The microstmctures and mechanical properties of the DLC coating were characterized with scanning electron microscopy, and conventional surface probes. The results show that the DLC coatings with strong interface adhesion significantly improve the surface mechanical properties of the Ti alloy. For instance, the DLC coating reduces the friction coefficient to below 0.15,lowers the wear rate to 1.7 × 10^-7 mm^3/N·m, increases the surface nano-hardness up to 21 GPa, and displays an interfacial adhesion strength of 256 mN. The test results show that the DLC coatings with Braycote 601EF vacuum grease composite lubricant are capable of satisfying the stringent requirements of wear resistance and anti-cold welding in space docking latch system.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2014年第7期707-713,共7页
Chinese Journal of Vacuum Science and Technology
关键词
空间对接锁系
表面强化及润滑
等离子体浸没离子注入与沉积
类金刚石碳膜
Space docking latch system
Surface strengthen and lubrication
Plasma immersion ion implantation anddeposition
Diamond-like carbon
