纳米MoS2薄膜的浸涂—热解法制备和摩擦学性能研究

用浸涂 -热解法在玻璃基底表面制备了纳米 Mo S2 薄膜 ,利用 X射线光电子能谱仪、X射线粉末衍射仪、原子力显微镜、静 -动摩擦系数测量仪和扫描电子显微镜等仪器研究了薄膜的微观结构、表面形貌和摩擦学性能 ,初步探讨了薄膜的摩擦磨损机制 .结果表明 :浸涂 -热解法制备的 Mo S2 薄膜由近似非晶的纳米微晶组成 ,薄膜均匀、致密 ,表面粗糙度小 ;在室温干摩擦条件下 ,Mo S2 薄膜与 GCr15钢球对摩时显示出良好的抗磨减摩性能 ;当负荷为 1.0 N而滑动速度为 90 mm/ min时 ,其耐磨寿命大于 5 0 0 0次 ,摩擦系数最低可达 0 .12 .磨损表面形貌显微分析表明 :在低速和低负荷下薄膜的磨损机制主要是塑性变形和轻微粘着转移 ,而在较负荷和速度下的主要磨损机制为塑性变形和严重剥落

Preparation and Investigation of Tribological Properties of Nano MoS2 Thin Films Prepared by Dip Coating-Thermolysis

Nano MoS 2 thin films were successfully fabricated on glass substrate by dip coating thermolysis technique. The microstructure, morphology and tribological properties of MoS 2 thin films were investigated by means of scanning electron microscopy, X ray photoelectron spectrometry, atomic force microscopy, and dynamic static friction and wear testing. As the results, the MoS 2 film is compact and uniform, with a surface roughness of Rms <0.3 nm. The film is crack free and consists of nanoscale crystallites. It shows good friction reducing and antiwear behavior in sliding against AISI 52100 steel at a relatively low load and sliding speed. Namely, the antiwear life is over 5 000 sliding cycles and the minimum friction coefficient is about 0.12. Observation of the worn surfaces of the film and the counterpart steel with a scanning electron microscope indicates that MoS 2 thin film is characterized by plastic deformation and slight adhesive transfer in sliding against the steel under a relatively low load and sliding speed, while it is characterized by plastic deformation and severe spalling under a relatively high load and sliding speed.