Study on the Tribological Properties of Graphite-like Amorphous Carbon Film under Different Testing Condi-tions
Graphite-like amorphous carbon film was fabricated by unbalanced magnetron sputtering technique. Raman spec-troscopy, atomic force microscopy (AFM) and tribometer were subsequently used to investigate the microstructure and tribological properties of the resultant film. It is found that the deposited carbon film is dominated by sp2 sites, and the intensity ratio of the D and G peaks is as high as 4.0, which is one order of magnitude larger than that of diamond-like carbon films with high sp3 content, indicating a more graphite-like structure. However, the as-deposited carbon film exhibits moderately high hardness (13.7 GPa), low internal stress (0.38 GPa) and superior tribological properties with high load bearing capacity (Hertz contact stress about 3.2 GPa) and low wear rate (2.73×l0-10 cm3/N·m) in ambient atmosphere. Although it displays a poor wear resistance in water lubricated condition, a superior wear resistance is achieved in oil lubricated condition. Its inherent physical property, the formation of transfer layer and the friction induced chemical reactions may be commonly responsible for its tribological properties.
magnetron sputtering graphite-like carbon film microstructure tribological properties load bearing capacity
Wang Yongjun Li Hongxuan Ji Li Zhao Fei Liu Xiaohong Wu Yanxia Zhou Huidi Chen Jianmin
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471
国际会议
西安
英文
359-365
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）