文档介绍：轴承珠表面固体润滑膜的制备
摘要
在高温、高真空或高低温循环等苛刻条件下,液体润滑剂由于无法满足使用要求,这使润滑剂面临严峻的挑战。在这些环境中,固体润滑膜可以代替液体润滑剂有效地发挥润滑功能,并己被广泛应用于真空设备及空间技术领域。由于具有优异的摩擦学性能以及高的抗氧化能力,使用MoS2己经成为解决苛刻运行环境中润滑问题的有效途径。
利用球磨工艺在钢球表面制备了MoS2薄膜。对制备的MoS2膜的厚度、元素成分、摩擦磨损等性能进行测试,实验结果表明钢球表面制备的MoS2膜分布均匀,对表面粗糙度影响较小,改善了基体材料的抗磨性能。
本文采用SEM,XRD,EDS对薄膜的形貌、结构、化学成分进行了表征和测试,并通过摩擦试验表征了MoS2薄膜的摩擦学性能。XRD检测结果显示,利用本课题球磨法在轴承珠表面制备的薄膜是晶态的。EDS测出MoS2薄膜内S、Mo元素的质量百分比和原子百分比。SEM分析发现薄膜由均匀的颗粒组成,薄膜与基体结合良好,没有出现开裂、分离的情况;由分析数据可知,实验参数不同,MoS2膜的成分结构及性质都有所变化。
实验结果表明:球磨机速率和转动时间为200r/min、5h时,制备出的固体润滑膜可以满足使用要求。
关键词固体润滑;二硫化钼;球磨法;转动时间;转动速率
Bearing the Pearl Surface Preparation of Solid Lubricating Film
Abstract
Great challenges have been confronted with the lubricant in severe operating environments (,. High temperature or vacuum, or circle between high and low temperature) where lubricating oil cannot be used. Solid lubricating films are often applied as an alternative lubricant and are finding greater practical uses in the fields of vacuum equipments, aviation and space applications. Due to excellent tribological properties and higher oxidation resistance temperature , MoS2 has been piratical solution for more rigorous application occasion.
Ball milling technology is employed to prepare MoS2 film on the surface of and steel balls. The film thickness, position, friction and wear behavior of the MoS2 film are tested, which shows that the MoS2 film on the surface of steel balls are uniform, hardly change the surface roughness, and improve wear behaviors of the balls.
The morphology , microstructure and ponent of MoS2 films were characterized by scanning electron microscope (SEM), X--ray diffraction (XRD) and energy dispersive X--ray spectroscope (EDS) respectively. The tribological properties of the MoS2 films were tested by muti-specimen test is found that the thin films is a crystallization by the anlysis of XRD. The quality percentage and the atomic percentage of S、Mo element are measured by the analysis of EDS. The analysis data revea