Friction of metal-matrix self-lubricating composites: Relationships among lubricant content, lubricating film coverage, and friction coefficient

Jinkun XIAO; Yuqing WU; Wei ZHANG; Juan CHEN; Chao ZHANG

doi:10.1007/s40544-019-0270-x

Friction 2020, 8(3): 517-530 https://doi.org/10.1007/s40544-019-0270-x

Research Article |

Open Access | Issue | Published: 27 March 2019

Friction of metal-matrix self-lubricating composites: Relationships among lubricant content, lubricating film coverage, and friction coefficient

Show Author's Information Hide Author's Information Jinkun XIAO^{¹^,²}(

), Yuqing WU^¹, Wei ZHANG^¹, Juan CHEN^³, Chao ZHANG^¹

1 College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

2 College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

3 Testing Center, Yangzhou University, Yangzhou 225009, China

Keywords:

friction coefficient, self-lubricating composites, XPS, lubricating film

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XIAO J, WU Y, ZHANG W, et al. Friction of metal-matrix self-lubricating composites: Relationships among lubricant content, lubricating film coverage, and friction coefficient. Friction, 2020, 8(3): 517-530. https://doi.org/10.1007/s40544-019-0270-x

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Abstract

Metal-matrix self-lubricating composites can exhibit excellent tribological properties owing to the release of solid lubricant from the matrix and the formation of a lubricating film on the tribosurface. The coverage of the lubricating film on a worn surface significantly influences the sliding process. However, it is difficult to quantify the film coverage owing to the thin and discontinuous character of the lubricating film and the high roughness of the worn surface. A quantitative characterization of the lubricating film coverage based on X-ray photoelectron spectroscopy (XPS) analysis was developed in this study. The friction tests of Cu-MoS₂ composites with a MoS₂ content of 0-40 vol% were conducted, and the worn surfaces of the composites were observed and analyzed. Further, the influence of the MoS₂ volume content on the coverage of the lubricating film on the worn surface was investigated. The relationships among the volume fraction of the lubricant, coverage of the lubricating film, and the friction coefficient were established. The friction model for the metal matrix self-lubricating composites was developed and verified to facilitate the composition design and friction coefficient prediction of self-lubricating composites.

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Friction of metal-matrix self-lubricating composites: Relationships among lubricant content, lubricating film coverage, and friction coefficient

Show Author's information Hide Author's Information Jinkun XIAO^{¹^,²}(

), Yuqing WU^¹, Wei ZHANG^¹, Juan CHEN^³, Chao ZHANG^¹

1 College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

2 College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

3 Testing Center, Yangzhou University, Yangzhou 225009, China

Abstract

Keywords: friction coefficient, self-lubricating composites, XPS, lubricating film

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Acknowledgements

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Publication history

Received: 06 May 2018

Revised: 30 July 2018

Accepted: 29 December 2018

Published: 27 March 2019

Issue date: June 2020

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China (Grant No. 51804272), Natural Science Foundation of Jiangsu Province (Grant No. BK20160472), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 17KJB460017), Project funded by China Postdoctoral Science Foundation (Grant No. 2018M640526), Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 1601095C and 2018K073C), Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. SJCX17_0623), Marine Science and Technology Project of Jiangsu Province (Grant No. HY2017-10), Cooperation Funding of Yangzhou City-Yangzhou University (Grant No. YZU201722), and Jiangdu Advanced Equipment Engineering Institute of Yangzhou University (Grant No. 2017-01) for the financial support provided.

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