| LIU Yong,SU Feng-hua,SUN Jian-fang,LI Zhu-jun,LIU Yi-fei.Tribological Properties of MoS2-Ti Self-lubricating Composite Film at High Temperature[J],51(2):20-28 |
| Tribological Properties of MoS2-Ti Self-lubricating Composite Film at High Temperature |
| Received:October 26, 2021 Revised:January 21, 2022 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.02.002 |
| KeyWord:magnetron sputtering MoS2-Ti composite films high temperature tribological properties wear mechanism |
| Author | Institution |
| LIU Yong |
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou , China |
| SU Feng-hua |
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou , China |
| SUN Jian-fang |
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou , China |
| LI Zhu-jun |
School of Electromechanical Engineering, Guangzhou Railway Polytechnic, Guangzhou , China |
| LIU Yi-fei |
School of Electromechanical Engineering, Guangzhou Railway Polytechnic, Guangzhou , China |
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| Abstract: |
| This paper aims to explore the effect of Ti content on the tribological properties of MoS2-Ti composite films at high temperature, and prepare MoS2-Ti self-lubricating composite film with good friction properties at high temperature. The MoS2-Ti composite films with different Ti contents were deposited by radio frequency and direct-current dual-target co-sputtering techniques. The effects of Ti content on the microstructures, mechanical properties and tribological behaviors at high temperature of the MoS2-Ti composite films were investigated. The composition, crystal phase structure and microstructure of the films were analyzed by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). A microhardness tester was applied to evaluate the mechanical properties of the MoS2-Ti composite films. UMT-TriboLab tribotest was employed to evaluate the tribological properties of MoS2-Ti composite films. Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) were used to further analyze the wear surface of the films and the composition of the transfer films on the counterparts. The results showed that Ti doping promoted the growth of the MoS2-Ti composite films in the preferred orientation of (002) crystal plane, and improved the density of the film. The hardness of the film increased from 70HV to 350HV as Ti doping into MoS2. The tribological properties of the MoS2-Ti composite films at high temperature increased firstly and then decreased with the increase of Ti content, and the MoS2-Ti composite films with Ti content of 6.81at.% possessed the best tribological properties. By analyzing the composition of the transfer film, it was found that the wear resistance of the MoS2-Ti composite films with Ti content of 13.51at.% began to decline at 300 ℃ due to more oxides generated during the sliding process. The tribological properties of the MoS2-Ti composite films at high temperature were greatly affected by the Ti content, and appropriate Ti doping could significantly improve the tribological properties of the MoS2 films at high temperature in atmospheric environment. |
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