无机纳米抗磨剂的摩擦学性能研究

Tribological Properties Research of Inorganic Nanometer Antiwear Agents

用超声波纳米粉碎机制备了纳米级的粉料,借助透射电镜表征分析了颗粒的粒度及形状。根据正交试验找到了较好的分散悬浮剂,通过添加分散悬浮剂和采用超声波分散的方法制备出悬浮性、分散性良好的油基纳米抗磨剂。用环块磨损试验机测定了纳米抗磨剂的摩擦学性能,发现:将含一定量的纳米抗磨剂加入到基础油中,可提高其抗磨减摩性能。正常供油状态下,该纳米抗磨剂的摩擦因数和相对磨耗都有了一定的降低。停止供油状态下,进一步验证了该纳米抗磨剂在摩擦表面的沉积及随后的剪切作用下形成了具有抗磨减摩作用的膜。

The nanoparticles were prepared with the ultrasonic nanometer pulverizer, the grain size and shape were evaluated through the transmission electron mircroscope. A suspending agent with good dispersion was obtained by using the orthogonal test. The oil-based nanometer antiwear agents with well suspension property and well dispersibility were prepared by choosing the proper dispersants and using the ultrasonic dispersion method. Tribological friction properties of the nanometer antiwear agents were measured with a block-on-ring tribometer. Results show that the wear resistance is improved, and the friction coefficient is decreased. The friction coefficient and wear rating of the nanometer antiwear agents are decreased on the condition of certain normal fuel feeding An antiwear film is formed on the rubbing surface by the deposition of the nanometer antiwear agents with the adsorbed dispersive due to shear effect is further proved without oil feeding.