A phosphonium-phosphinate ionic liquid (IL) was studied as a lubricant additive for rolling-sliding contacts. The bench-scale test was designed to simulate automotive rear axle operation during cold start, highway towing, and overload conditions. Adding such an IL (2%) into a base oil significantly reduced wear loss and rolling contact fatigue, e.g., microcracking and micropitting, but made the vibrational noise notably higher under a low (−1.5%) sliding roll ratio (SRR). Worn surface characterization revealed an interesting texture pattern with alternating smoother plateaus and rougher valleys, which is believed to cause the high vibration. No increased vibration was observed at a high (−30%) SRR, possibly because the more aggressive sliding abrasion prevented such a surface texture from forming.

研究了膦次膦酸根离子液体（IL）作为滚动滑动触点的润滑剂添加剂。台式测试旨在模拟汽车后轴在冷启动，高速公路牵引和过载情况下的运行情况。在基础油中添加这种IL（2％）可以显着降低磨损损失和滚动接触疲劳，例如微裂纹和微点蚀，但在低（-1.5％）滑动滚动比（SRR）下，振动噪声明显更高。破损的表面特征显示出有趣的纹理图案，其中平稳的高原和粗糙的山谷交替出现，这被认为会引起高振动。在高（-30％）SRR下未观察到振动增加，可能是因为更剧烈的滑动磨损阻止了这种表面纹理的形成。