FURTHER IMPROVING THE MECHANICAL AND HIGH-TEMPERATURE TRIBOLOGICAL PROPERTIES OF SILICON-DOPED DIAMOND-LIKE CARBON FILM BY TUNGSTEN INCORPORATION

Weijie Yu, Weijiu Huang, Junjun Wang, Yongyao Su and Xiaohong Gong
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Weijie Yu: School of Intelligent Manufacturing and Transportation, Chongqing Vocational Institute of Engineering, Chongqing 402260, P. R. China
Weijiu Huang: ��College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, P. R. China
Junjun Wang: ��College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
Yongyao Su: ��College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, P. R. China§College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China
Xiaohong Gong: ��College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China

Surface Review and Letters (SRL), 2024, vol. 31, issue 05, 1-12

Abstract: As an excellent solid lubrication material, the poor high-temperature tribological properties of diamond-like carbon (DLC) films severely limit their applications. In this study, tungsten (W) was incorporated into Si-doped DLC films fabricated via reactive magnetron sputtering. The effect of the W content ranging from 0 to 13.12 at.% on the film structure, bonding states, mechanical and high-temperature tribological properties of Si and W co-doped DLC (Si–W-DLC) films has been investigated. The results show that a small amount of tungsten incorporation (4.45 at.%, Si–WL-DLC) increases the mechanical properties of the Si–WL-DLC film without a significant decrease in the fraction of sp3 content. The incorporation of 4.45 at.% W improves the wear resistance and stabilizes the friction coefficient curves at temperatures up to 400∘C. The high residual stress caused by the highly distorted C–W bond and the low friction coefficient attributed to the formation of WO3 on the sliding surface should be responsible for the excellent tribological performance of the Si–WL-DLC film. It is believed that the Si and W co-doped DLC film can provide another strategy for expanding the high-temperature application of DLC films.

Keywords: Diamond-like carbon; Si and W co-doping; high temperature; tribology (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0218625X24500355

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