Fretting wear and fracture behaviors of Cr-doped and non-doped DLC films deposited on Ti–6al–4V alloy by unbalanced magnetron sputtering |
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| Affiliation: | 1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China;2. School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China;3. R&D Center of Lubricating and Protecting Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Cr-doped and non-doped diamond-like carbon (DLC) films were deposited on a Ti–6Al–4V alloy substrate using an unbalanced magnetron sputtering (UBMS). Fretting wear behavior of the specimens was investigated using a ball-on-disk fretting tester. The fracture phenomenon of the DLC films was determined as the number of fretting cycles to reach a high value of the friction coefficient. The results showed that the Cr-doped and non-doped DLC films exhibited a lower friction coefficient and wear rate compared to that of the uncoated specimen. However, the Cr-doped DLC film fractured only in a few cycles, while the non-doped DLC film fractured after fretting cycles of about 200,000. A fracture mechanism of the Cr-doped and non-doped DLC films was reported in this study. |
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