The development of hard-yet-tough ceramic coatings with self-lubricating behavior is an urgent technological requirement to reduce mechanical friction losses and energy consumption. However, traditional ceramics possessing the limited self-lubricating ability and poor toughness have limited their practical applications. To tackle the above-mentioned problems, we modified ceramic material vanadium nitride (VN) to prepare the catalytically active V-Ag-N solid solution coating by magnetron sputtering and realized high hardness, high toughness, and excellent self-lubricating performance under dry friction and oil lubrication conditions. Through detailed experimental investigations, we explain the enhanced mechanism of both hardness and toughness because of solute Ag; moreover, the solute Ag can trigger the appearance of lubricating silver vanadate phase in dry friction and result in a low coefficient of friction. Besides, it was confirmed that the solute Ag atom would induce effectively catalytic ability for in situ formation of self-lubricating onion-like-carbon structures (OLCs) scrolls from base oil at the sliding interface. The novel strategy would be to open a window for more efficiently catalyzing the in situ formation of silver vanadate and OLCs scrolls activated by solute Ag atoms and more significantly improving the hardness and toughness, thereby further improving self-lubricating behavior under dry friction and oil lubrication conditions.

具有自润滑性能的硬质韧性陶瓷涂料的开发是减少机械摩擦损失和能耗的迫切技术要求。然而，具有有限的自润滑能力和差的韧性的传统陶瓷限制了它们的实际应用。为解决上述问题，我们对陶瓷材料氮化钒（VN）进行了改性，通过磁控溅射制备了具有催化活性的V-Ag-N固溶体涂层，在干摩擦条件下实现了高硬度，高韧性和优异的自润滑性能。和机油润滑条件。通过详细的实验研究，我们解释了固溶Ag增强了硬度和韧性的机理。此外，Ag溶质在干摩擦中可触发润滑钒酸银相的出现，并导致低摩擦系数。此外，已证实，溶质Ag原子将有效地诱导催化作用，以从基础油在滑动界面上原位形成自润滑的洋葱状碳结构（OLC）涡旋体。新策略将是打开一个窗口，以更有效地催化原位形成钒酸银和溶质Ag原子活化的OLC涡旋，并显着改善硬度和韧性，从而进一步改善干摩擦和油润滑下的自润滑性能条件。可以确定的是，溶质Ag原子将有效地诱导催化作用，从而从基础油在滑动界面上原位形成自润滑的洋葱状碳结构（OLC）涡旋体。新策略将是打开一个窗口，以更有效地催化原位形成钒酸银和溶质Ag原子活化的OLC涡旋，并显着改善硬度和韧性，从而进一步改善干摩擦和油润滑下的自润滑性能条件。可以确定的是，溶质Ag原子会有效地诱导催化能力，从而在滑动界面上从基础油中原位形成自润滑的洋葱状碳结构（OLC）涡旋体。新策略将是打开一个窗口，以更有效地催化原位形成钒酸银和溶质Ag原子活化的OLC涡旋，并显着改善硬度和韧性，从而进一步改善干摩擦和油润滑下的自润滑性能条件。