目的 合成一种无卤素油溶性离子液体润滑添加剂(P88816-Phosphate，以下简称PP)，提高PAO 40作为硬质合金/镍基合金Inconel 690润滑剂的摩擦学性能。方法 以PP为添加剂，在PAO 40基础上配制质量分数为0.5%、1%、2%的润滑剂，与PAO 40进行对比。采用同步热分析仪分析其热稳定性，采用SRV-IV微动摩擦磨损试验机、MicroXAM-800非接触三维表面轮廓仪考察该离子液体减摩抗磨添加剂的摩擦学性能。结果 在50 ℃条件下，PP可以明显地提高PAO 40的减摩抗磨性能。1% PP的效果最为明显，摩擦因数降低了约22%，磨损体积减小了约48%。150 ℃条件下，0.5% PP的摩擦因数最低，而且磨损体积也是最小。结论 PP中活性元素P与金属基底发生摩擦化学反应，生成了摩擦化学反应膜。油溶性离子液体在镍基合金表面形成的润滑膜结构，可以揭示油溶性离子液体在减少金属摩擦和磨损方面的作用机制。PP有望为镍基合金提供更好的润滑保护，减少摩擦和磨损，延长设备的使用寿命，提高工业生产效率。

Soluble ionic liquid is a kind of organic salts with unique structures and properties that provide high thermal stability, low volatility, and excellent lubricating properties. It also has good thermal and chemical stability, which allows it to maintain its lubricating properties at high temperature and in harsh environments, thereby improving the tribological properties and service life of nickel-based alloys. It can be used as an alternative to greases and conventional lubricants to reduce energy loss and coefficient of friction in metal materials during friction and wear. In the study of tribological properties of nickel-based alloy lubrication additives, the effect of soluble ionic liquids is usually evaluated by tribological experiments. The effect of lubricants on performance indicators such as coefficient of friction, frictional wear, and surface fatigue are tested. Some studies have shown that the use of soluble ionic liquids as lubricant additives can significantly reduce the coefficient of friction and wear of nickel-based alloys. This is because soluble ionic liquids form a protective lubricating film on the metal surface, reducing direct metal-to-metal contact and friction.