沉积温度对CrN涂层干摩擦及大豆油润滑下摩擦学性能的影响

为探究沉积温度对CrN涂层摩擦学性能的影响，同时寻找适合CrN涂层润滑的绿色润滑剂，采用磁控溅射技术在不同温度下制备CrN涂层。利用X射线衍射仪、扫描电子显微镜、AFM原子力显微镜、划痕仪、纳米压痕仪和摩擦磨损试验机评价涂层的微观结构、力学性能，以及在干摩擦及大豆油润滑条件下的摩擦磨损性能。结果表明：在250 ℃下沉积的CrN涂层具有最致密的晶状结构，且力学性能最优。摩擦试验结果显示，在干摩擦和大豆油润滑下250 ℃下沉积的CrN涂层表现出最优的摩擦学特性。XPS分析表明，由于摩擦的存在，大豆油会在涂层表面发生摩擦化学反应并生成一层化学吸附膜，从而能有效减轻涂层的摩擦和磨损。250 ℃下沉积的CrN涂层具有最优的力学及摩擦学性能，且大豆油极为适合CrN涂层的润滑。

Effect of Deposition Temperature on the Tribological Properties of CrN Coatings under Dry Friction and Soybean Oil Lubrication Conditions

To investigate the effect of deposition temperature on the tribological properties of CrN coatings,find a green lubricant suitable for the coatings,the CrN coatings were prepared by magnetron sputtering technique at different deposition temperatures.Their microstructure,mechanical properties,as well as friction and wear properties were evaluated by using X-ray diffraction,scanning electron microscope,atomic force microscope,scratch tester,nano-indentation and tribotester respectively.The results show that the CrN coatings deposited at 250 ℃ have the densest crystalline structure and the best mechanical properties.Tribological experiments show that the CrN coatings deposited at 250 ℃ exhibit the optimum tribological properties under both dry friction and soybean oil lubrication conditions.XPS analysis shows that the soybean oil undergoes a tribochemical reaction due to the presence of friction and forms a chemisorbed film on the coating surface.This film effectively reduces the friction and wear of the coatings.CrN coatings deposited at 250 ℃ have the optimum mechanical and tribological properties,and soybean oil is an excellent lubricant for CrN coatings.