纳米铜润滑油添加剂的摩擦磨损特性及其机理研究

设计了4种试验方案,对比研究了不同摩擦试验条件下粒径为20 nm的铜添加剂对摩擦副的修复作用,考察了纳米铜添加剂在不同润滑油中的抗磨减摩性能,探讨了纳米铜添加剂的作用机理.结果表明:在摩擦过程中,纳米铜添加剂能够在磨损表面形成由粒径为0.1 μm团状物构成、低剪切强度的保护软膜,可以减小粘着磨损和磨粒磨损,使纳米铜添加剂表现出良好的抗磨减摩性能;对于基础润滑油650SN,纳米铜添加剂能够使其摩擦系数降低48%、磨痕宽度降低21%;对于坦克机油50CC,纳米铜添加剂能够使其摩擦系数降低40%、磨痕宽度降低33%;同时,铜保护膜修复了磨损表面的微坑和损伤,对摩擦副起到了有效的保护和修复作用.

Study on Friction and Wear Behavior and Mechanism of Nano-Cu Additive in Lubrication Oils

Protecting behavior of nano-Cu additive with 20 nm was investigated by four kinds of experiments. Antiwear and antifriction behavior of nano-Cu additive in different lubrication oils were tested. The action mechanism of nano-Cu additive was discussed. The results indicated that nano-Cu additive could form protecting film on worn surlubrication oil exhibited wonderful resistance to wear and friction, comparing with base lubrication oil 650SN and tank lubrication oil 50CC, the friction coefficient can be reduced by 48% and 40% respectively, the wear trace width can be decreased by 21% and 33% respectively. The protecting film could repair the tiny hole and so nano-Cu additive in lubrication oil exhibited good protection and repairing behavior.