Robust superlubricity of the disulphide-based film or diamond-like carbon (DLC) coating has been systematically investigated in relation to interfacial nanostructures and environmental atmospheres. Nevertheless, the frictional performances of the tribo-couple between them, especially the underlying mechanisms governing superlubricity are scarcely touched. In this study, we designed the periodically multilayered MoS₂-Ag film based on ion beam assisted deposition (IBAD) and found a superior lubricating durability of the film with a superlow friction coefficient of 0.0065 triggered by DLC film under a load of 10 N in N₂. The in-depth structural analysis on the contact areas of tribopairs were performed through Raman and high-resolution transmission electron microscopy (HRTEM). The results demonstrate that sliding-affected regions of the film generally undergo a deep amorphization transformation and the materials are transferred to counterfacing ball to form a multiphase tribofilm. The prevailing mechanisms emphasize that the superlubricious status highly depends on the synergistic effect from both the physicochemical properties of shear-induced tribofilm and the structural transformation of the MoS₂-Ag surface by different contact mechanics and reconfiguration pathways. The findings shed light on the nature of tribochemical mechanisms of MoS₂-Ag film and provide a new strategy to achieve macroscale superlubricity of the disulphide-related lubricants.

二硫化物基薄膜或类金刚石碳 (DLC) 涂层的稳健超润滑性已在界面纳米结构和环境大气中得到系统研究。然而，它们之间摩擦偶的摩擦性能，尤其是控制超润滑性的潜在机制几乎没有被触及。在这项研究中，我们设计了基于离子束辅助沉积 (IBAD)的周期性多层 MoS ₂ -Ag 薄膜，并发现该薄膜具有优异的润滑耐久性，在 10 N 载荷下由 DLC 薄膜触发的超低摩擦系数为 0.0065。 N ₂. 通过拉曼和高分辨率透射电子显微镜 (HRTEM) 对摩擦对的接触区域进行了深入的结构分析。结果表明，薄膜的滑动影响区域通常会发生深度非晶化转变，并且材料被转移到对向球以形成多相摩擦膜。普遍的机制强调，超润滑状态高度依赖于剪切诱导摩擦膜的物理化学性质和 MoS ₂ -Ag 表面通过不同接触力学和重构途径的结构转变的协同作用。这些发现揭示了 MoS ₂摩擦化学机制的性质-Ag 膜并提供了一种新的策略来实现与二硫化物相关的润滑剂的宏观超润滑性。