真空中不同转速和对偶对a-C:H膜摩擦学性能的影响

Effect of Rotational Speeds and Mated Balls on the Vacuum Tribological Properties of a-C∶H film

非晶碳氢(a-C∶H)薄膜作为空间润滑材料有很大的应用前景,它在真空中的摩擦磨损行为与掺杂元素、摩擦对偶、滑动速度等因素有关。采用中频非平衡磁控溅射法在AISI202不锈钢和p(111)单晶硅基体上沉积了厚度为1.3～1.6μm的a-C∶H膜以及Cr、MoS2掺杂的a-C∶H复合膜。采用球盘摩擦试验机对3种膜的真空摩擦学行为进行了研究,摩擦性能较好的薄膜在真空中进行了GCr15、Si3N4和C不同对偶以及100、500、1000r/min的不同转速摩擦实验。结果表明:在沉积气压为5.3×10-1 Pa,Ar和CH4的气体流量比为1∶1,单纯溅射石墨靶(溅射电流12A)的条件下,制备的a-C∶H薄膜在真空中的摩擦因数最低(0.005),寿命相对最长;对偶对a-C∶H膜的摩擦因数影响不大,但薄膜的耐磨寿命随着对偶硬度的增加而降低;随着转速的增加,a-C∶H膜的摩擦因数和耐磨寿命均降低。

Remanufacturing in China is still in its early stage and faces various pressures from society, policy, technology and management. Considering the actual states of remanufacturing in China, this paper researches several key management issues that are cared by various aspects from angle of view of remanufacturing players. Based on the trend of development of remanufacturing in China, five key management issues are mainly researched, risk management of remanufacturing players, remanufacturing production management, remanufacturing quality management, authentication mode of remanufacturing in China, and performance assessment of remanufacturing. The characteristics of six issues are analyzed and the corresponding countermeasures are put forward.