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Herein, a series of Ag coatings with different micro-dimples were fabricated on copper surfaces by laser surface texturing (LST) and magnetron sputtering. Multilayer graphene lubricating grease (MGLG) was prepared using multilayer graphene as an additive. The textured Ag coatings and MGLG were characterized. Moreover, the tribological and electrical performances of the textured Ag coatings under MGLG lubrication were investigated in detail. Results demonstrated that the textured Ag coating with an appropriate dimple diameter could exhibit improved tribological and electrical properties when compared to the non-textured Ag coating under MGLG lubrication. The characterization and analysis of the worn surfaces suggest that the synergetic effect of LST and MGLG contributes to these excellent tribological and electrical properties.


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A synergetic strategy based on laser surface texturing and lubricating grease for improving the tribological and electrical properties of Ag coating under current-carrying friction

Show Author's information Zhengfeng CAO1( )Yanqiu XIA2( )Chuan CHEN2,3Kai ZHENG1Yi ZHANG1
School of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Global Energy Interconnection Research Institute Co., Ltd., Beijing 102211, China

Abstract

Herein, a series of Ag coatings with different micro-dimples were fabricated on copper surfaces by laser surface texturing (LST) and magnetron sputtering. Multilayer graphene lubricating grease (MGLG) was prepared using multilayer graphene as an additive. The textured Ag coatings and MGLG were characterized. Moreover, the tribological and electrical performances of the textured Ag coatings under MGLG lubrication were investigated in detail. Results demonstrated that the textured Ag coating with an appropriate dimple diameter could exhibit improved tribological and electrical properties when compared to the non-textured Ag coating under MGLG lubrication. The characterization and analysis of the worn surfaces suggest that the synergetic effect of LST and MGLG contributes to these excellent tribological and electrical properties.

Keywords: tribology, laser surface texturing, contact resistance, lubricating grease

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Publication history

Received: 19 September 2019
Revised: 17 February 2020
Accepted: 15 March 2020
Published: 26 August 2020
Issue date: October 2021

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© The author(s) 2020

Acknowledgements

This work is supported by the Natural Science Foundation of Beijing Municipality (No. 2172053) and National Natural Science Foundation of China (No. 51575181).

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