黑云母/氯化镧复合粉体的摩擦性能

Tribological Properties of Biotite/Lanthanum Chloride Composite Powders

以黑云母粗矿和氯化镧为原料,通过行星式球磨机制备氯化镧/黑云母复合粉体润滑添加剂,在500SN基础油中添加1%(质量分数)的氯化镧/黑云母复合粉体润滑添加剂制成新型润滑油,并在SFT-2M销盘式摩擦磨损试验机上对轴承钢试件的摩擦副进行基础油与新型润滑油的对比试验及其摩擦学性能评价。结果表明:新型润滑油具有更好的减摩耐磨性,其摩擦因数较基础油降低约20%,磨损后的试件表面光滑,复合润滑添加剂在摩擦副间发生复杂的物理化学反应,在表面形成了非均匀覆盖的摩擦表面膜。

The biotite/lanthanum composite powders were prepared with raw materials of coarse ore biotite and lanthanum chloride compound by a high-energy mechanical ball-milling method. The 500SN base oil was added with the composite powder as a lubricant additive of 1% （in mass fraction）. The tribological properties of the composite powder as a lubricant additive were examined by a model SFT-2M high speed disc pins friction abrasion tester. The results show that the composite powder can enhance the friction and wear reducing properties, compared to biotite powder. The friction factor of the disk with the composite powder in the base oil is decreased by approximate 20%. The worn surface shows smooth and compact, indicating that the composite particles have the physicochemical interactions at the friction interface and form a non-uniform coverage of the friction surface film for the improvement of the wear resistance and lubricating properties.