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Influence of Ag Content on Microstructure, Mechanical and Tribological Properties of WNbN-Ag Composite Films

  • Lihua YuEmail author
  • Yanlei Lin
  • Hongbo Ju
  • Yaoxiang Geng
  • Isaac Asempah
  • Junhua Xu
NEW SUBSTANCES, MATERIALS, AND COATINGS
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Abstract

WNbN composite films with different Ag content were deposited by reactive multi-target magnetron sputtering. The microstructure, mechanical and tribological properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), high resolution transmission electron microscopy (HRTEM), nano-indentation and ball-on-disc tribo-mter analysis. The results indicated that WNbN-Ag film consists of face-centered cubic (fcc) WNbN, face-centered cubic (fcc) NbN, hexagonal close-packed (hcp) NbN and face-centered cubic (fcc) Ag. The hardness and elastic modulus of WNbN-Ag composite film decreases gradually as Ag content increases from 0 to 25.23 at %. At room temperature, the friction coefficient of the film firstly increases and then decreases, while the wear rate gradually increases with the increasing Ag content. As the temperature increases from room temperature to 700°C, the friction coefficient firstly increases and then decreases, while the wear rate gradually increases. The tribological properties of the film depended on the testing temperatures significantly because the testing temperatures influenced the hardness, the tribo-films and wear mechanism of the film.

Keywords:

magnetron sputtering WNbN-Ag composite film microstructure mechanical properties tribological properties 

Notes

ACKNOWLEDGMENTS

This paper supported by the National Natural Science Foundation of China (51374115, 51574131)

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Lihua Yu
    • 1
    Email author
  • Yanlei Lin
    • 1
  • Hongbo Ju
    • 1
  • Yaoxiang Geng
    • 1
  • Isaac Asempah
    • 1
  • Junhua Xu
    • 1
  1. 1.School of Material Science and Engineering, Jiangsu University of Science and TechnologyZhenjiangChina

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