Tribological properties of MoS2 powder-lubricated interface
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 27 July 2021
Issue publication date: 9 September 2021
Abstract
Purpose
This study aims to investigate the effect of MoS2 powder on tribological properties of sliding interfaces.
Design/methodology/approach
Loose MoS2 powder was introduced in the gap of point-contact friction pairs, and sliding friction test was conducted using a testing machine. Friction noise, wear mark appearance, microstructure and wear debris were characterized with a noise tester, white-light interferometer, scanning electron microscope and ferrograph, respectively. Numerical simulation was also performed to analyze the influence of MoS2 powder on tribological properties of the sliding interface.
Findings
MoS2 powder remarkably improved the lubrication performance of the sliding interface, whose friction coefficient and wear rate were reduced by one-fifth of the interface values without powder. The addition of MoS2 powder also reduced stress, plastic deformation and friction temperature in the wear mark. The sliding interface with MoS2 powder demonstrated lower friction noise and roughness compared with the interface without powder lubrication. The adherence of MoS2 powder onto the friction interface formed a friction film, which induced the wear mechanism of the sliding interface to change from serious cutting and adhesive wear to delamination and slight cutting wear under the action of normal and shear forces.
Originality/value
Tribological characteristics of the interface with MoS2 powder lubrication were clarified. This work provides a theoretical basis for solid-powder lubrication and reference for its application in engineering.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0150/
Keywords
Acknowledgements
This research was supported by the National Natural Science Foundation of China (Grant No. 51575151) and the Tribology Science Found of State Key Laboratory of Tribology (No. SKLTKF17B01), which are gratefully acknowledged. The authors thank Rongrong Li of Hefei University of technology and Congmin Li of Hefei University of technology for their assistance in the experimental characterization and analyses.
Citation
Liu, C., Yin, Y., Tong, B. and Zhang, G. (2021), "Tribological properties of MoS2 powder-lubricated interface", Industrial Lubrication and Tribology, Vol. 73 No. 6, pp. 839-845. https://doi.org/10.1108/ILT-04-2020-0150
Publisher
:Emerald Publishing Limited
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