Journal
TRIBOLOGY INTERNATIONAL
Volume 174, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2022.107774
Keywords
Mo content; Nanocrystals; Tribology; Diamond -like carbon
Categories
Funding
- Chongqing Technology Innovation and Application Development Project [cstc2019jscx-fxydX0046]
- Nat- ural Science Foundation of Chongqing Municipal Science and Technol- ogy Commission [cstc2020jcyj-msxmX0069, cstc2018jcyj-yszxX0003]
- Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJQN201901340]
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The microstructure and tribology property evolution of Mo-doped DLC films were investigated. It was found that a nanocrystal/amorphous structure was formed at high Mo concentration, which had an impact on adhesion and wear resistance.
To explore the microstructure and tribology property evolution of diamond-like carbon (DLC) film with variable Mo concentrations, Mo-doped DLC films were prepared by magnetron sputtering equipment. The results showed that the Mo concentration in the DLC films increased from 2.1 to 30 at% with the Ar/C2H2 gas flow ratio (3:1-9:1). Mo was dispersed in DLC film at a low doping concentration (2.1 at%). Moreover, MoC nanocrystals were present, and a nanocrystal/amorphous microstructure was formed at a high doping concentration (& GE;8.3 at %). The DLC films with 2.1 at% Mo showed the best adhesion (200 mN) and the minimum wear rate (1.47 x 10-8 mm3/ N.m), and high Mo concentration (& GE;8.3 at%) was detrimental to wear resistance and adhesion.
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