Abstract The friction coefficient of thermal sprayed ceramic coatings is relatively high, and the traditional introduction of lubricants will result in the decline of mechanical properties of coatings, which severely limits their applications. Herein, YSZ/Ag self-lubricating coatings were prepared on 316 L stainless steel substrates via thermal spraying technology, vacuum impregnation and in-situ synthesis for the first time. The morphologies, mechanical properties and vacuum tribological performance of composite coatings were studied in detail by comparing with YSZ coatings. Results show that silver particles distribute in the pores, cracks of YSZ coatings, and the filling of defects by silver improves the micro-hardness, fracture toughness and cohesive strength of the coatings. In addition, owing to the formation of lubricating film during the sliding process in vacuum, the friction coefficient of the coating is reduced by about 2 times and the wear rate is reduced by about 600 times after the introduction of silver. At the same time, the addition of the silver lubricant makes the wear of the coupling ball significantly reduced. Since the lubricating film can be continuously replenished and repaired, the YSZ/Ag self-lubricating coating has a relatively long service life (>100,000 sliding cycles).

中文翻译：

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将软金属Ag有效引入喷涂成型的YSZ模板制备复合涂层的制备及其真空摩擦学性能

摘要 热喷涂陶瓷涂层的摩擦系数较高，传统的润滑剂的引入会导致涂层力学性能的下降，严重限制了其应用。在此，首次通过热喷涂技术、真空浸渍和原位合成在 316 L 不锈钢基材上制备了 YSZ/Ag 自润滑涂层。通过与YSZ涂层的对比，详细研究了复合涂层的形貌、力学性能和真空摩擦学性能。结果表明，银粒子分布在YSZ涂层的孔隙、裂纹中，银对缺陷的填充提高了涂层的显微硬度、断裂韧性和内聚强度。此外，由于在真空中滑动过程中形成润滑膜，引入银后涂层的摩擦系数降低约2倍，磨损率降低约600倍。同时，银润滑剂的加入使联轴器球的磨损显着降低。由于润滑膜可以不断补充和修复，YSZ/Ag自润滑涂层的使用寿命相对较长（>100,000次滑动循环）。