The sensitivities to operation conditions may reduce the reliability and stability of liquid superlubricity and limit industrial application of the lubrication system. Here, we demonstrated that the superlubricity of Si₃N₄/glass sliding interface lubricated with H₃PO₄ solution degenerated as speed/load decreased or increased, which was temporary or permanent depending on the different shear-induced evolutions of substrate surface topographies. The smooth contacting surface produced in superlubricity stage could be maintained during the temporary superlubricity failure at decreased speed/load condition and the superlubricity was restored when speed/load was recovered. Differently, severe wear induced by high load/speed disabled the hydration lubricating layer and resulted in irreversible superlubricity degeneration. Finally, the relationship between the lubrication state of liquid superlubricity system and the sliding surface roughness was established.

对操作条件的敏感性可能会降低液体超润滑性的可靠性和稳定性，并限制润滑系统的工业应用。在这里，我们证明了用H ₃ PO ₄润滑的Si ₃ N ₄ /玻璃滑动界面的超润滑性溶液随着速度/负载的减少或增加而退化，这是暂时的还是永久的，具体取决于基体表面形貌的不同剪切诱导演化。在暂时的超润滑失效期间，在降低的速度/负载条件下，可保持在超润滑阶段产生的光滑接触表面，并在恢复速度/负载后恢复超润滑。不同的是，高负荷/高速度引起的严重磨损使水合润滑层失效，并导致不可逆的超润滑性退化。最后，建立了液体超润滑系统的润滑状态与滑动表面粗糙度之间的关系。