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Research Article | Open Access

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

Zhengfeng CAO1(), Yanqiu XIA2(), Chuan CHEN2,3, Kai ZHENG1, Yi 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
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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

laser surface texturingtribologycontact resistancelubricating grease

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Friction
Volume 9 Issue 5,
October 2021
Pages 978-989
DOI: 10.1007/s40544-020-0383-2
Cite this article:
CAO Z, XIA Y, CHEN C, et al. 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. Friction, 2021, 9(5): 978-989. https://doi.org/10.1007/s40544-020-0383-2
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10.1007/s40544-020-0383-2.T001Typical properties of PAG.

ItemKinematic viscosity (mm2/s)Viscosity indexPour point (℃)Fire point (℃)Volume resistivity (μΩ·cm)
40 ℃100 ℃
PAG32036163-372603.2×105

10.1007/s40544-020-0383-2.T002Physical characteristics of the base grease and MGLG.

SamplePenetration (mm)Dropping point (℃)Copper corrosion (T2 copper, 100 ℃, 24 h)Volume resistivity (μΩ·cm)
Base grease3982731a2.7×105
MGLG3752931a3.8×104