摘要
通过化学合成法制备了稀土La_(2)O_(3)/CeO_(2)复合润滑添加剂,采用油酸改性使其在油中稳定分散,以400SN为基础油考察了在点、面接触条件下添加剂的摩擦学性能,并探讨了添加剂的减摩自修复机理。试验发现:添加剂具有良好的减摩性能是由于粒子表面包覆的油酸在摩擦表面形成了低剪切强度的润滑膜,同时,添加剂粒子在摩擦表面起到了“微轴承”的滚珠效应进一步减小了摩擦;添加剂具有良好的抗磨性能则是由于粒子同金属表面形成了合金层;合金层的形成对磨损表面起到了较好的修复作用,在稀土粒子的催化作用下,油酸中的活性C在摩擦表面形成的渗碳层则进一步增强了修复效果。
The La_(2)O_(3)/CeO_(2)composite lubricant additive,prepared by chemical synthesis,was modified by oleic acid to improve its stabilized dispersion in oil.Under the condition of spot and surface contact,the tribological properties of the additive were investigated using 400 SN as the base oil,and its anti-friction and self-healing mechanism was discussed.The results show that the additive has a good anti-friction property due to the fact that the oleic acid coated on the particle surface forms a lubricating film with a low shear strength on the friction surface and that the additive particles act as"micro-bearing"balls on the friction surface to further reduce the friction.Moreover,the additive has a good anti-wear property because the particles form an alloy layer on the metal surface,which plays an important role in worn surface healing.Under the catalysis of rare earth particles,the carburizing layer formed by activated carbons in oleic acid on the friction surface further enhances the healing effect.
作者
程鹏
肖楚
刘妹静
曹静瀅
CHENG Peng;XIAO Chu;LIU Mei-jing;CAO Jing-ying(Fundamental Studies Department,Army Logistics University of PLA,Chongqing,Sichuan 401311,China)
出处
《润滑油》
CAS
2022年第2期21-27,共7页
Lubricating Oil
基金
陆军勤务学院青年基金(X205051112)
院科研基金(X2020505)
