Experimental investigation on the tribological property of functionalized graphene lubricant against steel
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 10 January 2020
Issue publication date: 6 April 2020
Abstract
Purpose
The purpose of this study is to corroborate the advanced tribological properties of graphene as a lubricant additive.
Design/methodology/approach
Different concentrations of functionalized graphene were coated on the substrate surface. Tribological properties of the graphene lubricants were carried out by ball-on-disk tribology tests. Wear mechanism of functionalized graphene was studied by observing wear scars on the substrate surface. Finally, the wear resistance of modified graphene was calculated by calculating and analyzing the applied experimental conditions and the obtained experimental data.
Findings
The best concentration of graphene lubricant is 0.5 wt.% which shows the best tribological performance. And the coefficient of friction is 0.08. Compared with the dry friction condition, the coefficient of friction and wear rate of best graphene lubricant decreased by 80% and 82%.
Originality/value
The formula of graphene lubricant is independently developed and works very well. Graphene lubricant can prevent the substrate from oxidation. The thickness of the graphene lubricant is about 4-7µm. The concept of anti-wear strength was introduced in this paper. When 0.5 Vol.% graphene was added, the anti-wear strength was greatly improved from 115.3 kg·mm-2 to 657.6 kg·mm-2.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2019-0344
Keywords
Acknowledgements
The authors gratefully acknowledge the substantial support to this research from the National Natural Science Foundation of China (Grant No. 51805313) and the School-enterprise cooperation project of Shanghai University of Engineering Science and Shanghai Dongfu Cold Forging Manufactory Co., Ltd. (Grant (17)CL-003).
Citation
Qian, Y., Gong, H., Zhao, X., Cao, L., Shi, W. and He, J. (2020), "Experimental investigation on the tribological property of functionalized graphene lubricant against steel", Industrial Lubrication and Tribology, Vol. 72 No. 3, pp. 307-314. https://doi.org/10.1108/ILT-08-2019-0344
Publisher
:Emerald Publishing Limited
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