核壳式纳米铜-锡粉的极压抗磨性能研究

Study on Pressure and Antiwear Property of the Core-shell Cu-Sn Nanoparticles

研究了纳米核壳式铜-锡双金属粉在空气中不易氧化的特性。另将核壳式纳米铜-锡粉作为添加剂，分别添加到500SN油15W／40SG／CD发动机油中，用四球摩擦试验机考察了极压抗磨性能。用0．015％的添加量，就可较大幅度提高润滑油最大无卡咬Ps值（达1000N／GB3142左右）。此外还考察了核壳式纳米铜-锡粉与磷酸钼抗磨剂复配的极压抗磨效果。证实它是一种高效极压抗磨添加剂。

Study on character of which the core-shell Cu-Sn bimetallic nanoparticles is not easy to be oxidized in the air. Then use Cn-Sn nanoparticles as additive, and add it to 500SN oil, and 15W/40SG/CD engine oil respectively. Use four-ball machine to test their pressure and antiwear property. As few as 0,015% amount of additive increase greatly the PB of the lubricant oil （It reaches nearly 1 000N/GB3142）. Also find that when core-shell Cu-Sn nanoparticles are combined with Molybdenum phosphate, their pressure and antiwear property are better. It is a highly efficient pressure and antiwear additive.