超细粉润滑剂的稳定性

Stability Research of Ultrafine Powders Lubricant

摘要: 为解决超细金属粉固体润滑剂的稳定性问题,分析了单个粉末颗粒和超细金属粉末在液体中实现稳定分散和悬浮的条件.结果表明,表面未包覆的粉末在液相中很难稳定存在,而表面包覆的超细金属粉末由于粉末表面吸附层产生的空间位阻效应,且在吸附层厚度大于4.2nm时,超细金属粉末才能在润滑油中实现稳定的悬浮.

Abstract: For the resolution of stability of ultrafine powders lubricant, the essential condition by which single particle and untrafine metal powders can disperse and suspend in liquld phases was analyzed. There result pointed out just because of the surface coating and the space-resistive effect, and only the thickness of surface-coating is larger than 4.2 nm, the stable suspending of ultrafine powders in oil can be realized.