The solid lubricant MoS₂ demonstrates excellent lubricating properties, but it spontaneously oxidizes and absorbs moisture in air, and thus results in poor wear resistance and short wear-life. In this study, the additive g-C₃N₄ (CN) was successfully combined with MoS₂ via hydrothermal synthesis as a solid lubricant for the first time. Meanwhile, a low friction coefficient (COF, μ = 0.031) and ultra-long wear-life of CN/MoS₂ compared to pure MoS₂ in air were demonstrated. The functional groups and good crystallinity of the lubricant material were characterized via Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The formed valence states in CN/MoS₂ were analyzed via X-ray photoelectron spectroscopy (XPS). The characterized results of the scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) show the morphology and interior crystal phase structure of CN/MoS₂. From the cross-section analysis, the presence of iron oxide nanoparticles lubricating film is synergistic with CN/MoS₂ film during the friction process, resulting in its ultra-long wear-life. In particular, the friction mechanism of interlayer sliding friction combined with energy storage friction was analyzed and proposed.

固体润滑剂MoS ₂具有优异的润滑性能，但会自发氧化并吸收空气中的水分，因此会导致耐磨性差和磨损寿命短。在这项研究中，添加剂gC ₃ N ₄（CN）首次通过水热合成成功与MoS ₂结合作为固体润滑剂。同时，与纯MoS ₂在空气中相比，具有较低的摩擦系数（COF，μ= 0.031）和超长的CN / MoS ₂磨损寿命。通过傅立叶变换红外（FTIR）光谱和X射线衍射（XRD）表征了润滑材料的官能团和良好的结晶性。CN / MoS中形成的价态通过X射线光电子能谱法（XPS）分析了_2种。扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）的表征结果显示了CN / MoS ₂的形貌和内部晶体相结构。从横截面分析来看，氧化铁纳米粒子润滑膜的存在与CN / MoS ₂膜在摩擦过程中具有协同作用，从而具有超长的磨损寿命。特别地，分析并提出了层间滑动摩擦与储能摩擦相结合的摩擦机理。