纳米LaF3液体润滑油添加剂的摩擦学性能研究

以氯化镧、氟化铵为原料、硅烷偶联剂为表面修饰剂制备LaF3胶体，通过相转移法将制备的LaF3胶体转移至油酸甲酯中，得到粒径为40 nm的纳米LaF3添加剂；结合离心沉降法和升温法研究纳米LaF3在100N基础油中的分散稳定性和高温稳定性，利用四球试验机考察纳米LaF3添加剂的摩擦学性能，利用SEM与EDS手段分析磨损钢球表面的磨斑形貌。结果表明，纳米LaF3添加剂在100N基础油中具有良好的分散稳定性、极压抗磨及减摩性能，磨损钢球表面磨痕明显减轻，主要是在磨损表面生成含La、F等元素的保护膜。

STUDY ON PREPARATION AND PROPERTIES OF LaF3 NANOPARTICLES LIQUID LUBRICATING ADDITIVE

With lanthanum chloride,ammonium fluoride as raw material，silane coupling agent as the surface modification agent prepare colloid LaF3 By phase transfer method to transfer the prepared LaF3 colloid to methyl oleate，getting the diameter of 40 nm nano LaF3 addictives.．Centrifugal sedimentation method and speed temperature control was used to study the additive of nano LaF3 dispersion stability and high-temperature stability. Tribological properties of nano LaF3 liquid additives were studied with a four-ball wear test machine, and steel ball surface were investigated by scanning electron microscopy (SEM) and (EDS). The results show that nano LaF3 liquid additives in the 100N base oil has good dispersion stability, with excellent extreme pressure, anti-wear and friction-reducing properties. Surface wear of steel balls significantly reduce and wear surface protecting film containing elements such as La,F.