运动黏度在FLC薄膜-白油固液复合润滑体系中的作用  

The Role of Kinematic Viscosity of White Oil in FLC-oil Lubrication System

作　　者：汪佳[1,2] 王富国[1] 曹忠跃[1,2] 张俊彦[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院大学,北京100049

出　　处：《摩擦学学报》2016年第4期438-444,共7页Tribology

基　　金：国家重点基础研究发展规划项目(973)(2013CB632304)~~

摘　　要：利用直流等离子体沉积技术制备了含氢类富勒烯碳膜(FLC),在工业级白油润滑条件下考察了FLC薄膜润湿性、摩擦学特性和白油运动黏度对整个固液复合润滑体系的影响。研究结果表明:在5~150 mm^2/s的考察范围内,白油的运动黏度越小,其对FLC薄膜的润湿性越好;随着运动黏度的增大,白油分子量增加且分子链变长,在薄膜表面油膜吸附增强,油膜厚度增加,FLC薄膜摩擦系数逐渐减小,于32 mm^2/s时达到最小值(0.114),随着黏度进一步增大,过高的运动黏度增加了黏性阻力和摩擦阻力,FLC薄膜摩擦系数反而上升;同时,FLC薄膜的磨损率随黏度增大而减小,当黏度超过26 mm^2/s之后,变化幅度趋缓。A hydrogenated fullerene-like carbon（FLC） film was prepared by dc pulse plasma-enhanced chemical vapor deposition technique. The wetting, friction and wear behaviors of FLC film with industrial white oils were investigated,and the influence of kinematic viscosity（5~150 mm^2/s） of white oil on such a solid-liquid lubrication system was also analyzed. The results show that the lower the kinematic viscosity was, the better the wettability of FLC film showed.And with the rise of kinematic viscosity, the molecular weights and chain lengths of white oils kept an upward tendency,the oil-film coherency was strengthened and the oil-film thickness was grown up, therefore the friction of FLC film reduced significantly and the friction coefficient reached its lowest value（0.114） at 32 mm^2/s. However, when the increasing of kinematic viscosity was going on, the rising of friction occurred instead, which was due to the increment of viscous or friction drag in solid-liquid composite lubrication system. At the same time, the wear rate of FLC film continuously decreased, but the variation was not obvious when the kinematic viscosity was larger than 26 mm2/s.

关 键 词：FLC薄膜 白油 运动黏度 润湿 摩擦 磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]