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Tribology Letters

, 67:98 | Cite as

Effect of Adding Tungsten Disulfide to a Copper Matrix on the Formation of Tribo-Film and on the Tribological Behavior of Copper/Tungsten Disulfide Composites

  • Lin Zhao
  • Pingping YaoEmail author
  • Taiming Gong
  • Haibin Zhou
  • Minwen Deng
  • Zonghao Wang
  • Zhongyi Zhang
  • Yelong Xiao
  • Fenghua LuoEmail author
Original Paper
  • 68 Downloads

Abstract

The tribological behavior and formation of tribo-film of copper/tungsten disulfide (WS2) composites featuring 0–30% WS2 volume fractions, prepared using spark plasma sintering were investigated. Results indicated that WS2 as addition into the copper matrix could effectively reduce the coefficient of friction (COF) of Cu/WS2 composites. The lowest COF obtained was 0.16, while the wear rate was approximately 5 × 10−5 mm3·N− 1·m−1 for the Cu/WS2 composite which contained 25vol% of WS2 (here defined as Cu-25WS2). X-ray photoelectron spectroscopy and transmission electron microscopy analyses indicated that an oxygen-rich tribo-film with a thickness of approximately 10 nm was formed on the wear track, while a thick layer which was rich in WS2 and Cu2S and with a thickness of approximately 50 nm was observed below the oxygen-rich tribo-film. The superior tribological properties could ascribed to the formation of these tribo-films.

Keywords

Copper matrix composites Tribological properties Tungsten disulfide Tribo-film Wear mechanism 

Notes

Acknowledgements

This work was supported by the National Nature Science Foundation of China. [Grant Number 51475476]. Thanks to Dr. Yang Li, Dr. Xiaoqin Ou and Dr. Hui Deng from Central South University, China for their kind contributions.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Lin Zhao
    • 1
  • Pingping Yao
    • 1
    Email author
  • Taiming Gong
    • 1
  • Haibin Zhou
    • 1
  • Minwen Deng
    • 1
  • Zonghao Wang
    • 1
  • Zhongyi Zhang
    • 1
  • Yelong Xiao
    • 1
  • Fenghua Luo
    • 1
    Email author
  1. 1.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina

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