File(s) under permanent embargo

Reason: Unsuitable version

Tribological behavior of diamond-like carbon coatings with patterned structure deposited by the filtered cathodic vacuum arc

journal contribution
posted on 01.04.2020, 15:08 by Yongqing Shen, Han Zhou, Haoqi Wang, Bin Liao, Xianying Wu, Xu Zhang
Patterned diamond-like carbon (DLC) coatings were deposited on a Si (100) substrate using the filtered cathodic vacuum arc technique. The effects of the patterning and of the coating thickness on tribological behavior of DLC coating were investigated using a ball-on-disk tribometer under dry and oil-lubrication conditions. The results suggest that 1 mm2 patterned structures delimited by 100-μm grooves can enhance the tribological properties. The coefficients of friction of the tested patterned films were 0.123 and 0.067 under dry and oil lubrication conditions, respectively, 10% and 21% lower than the coefficients of friction of the continuous DLC films with the same thickness. Raman spectroscopy measurements showed graphitized wear particles for both the continuous and patterned DLC films, but the debris of patterned DLC films having a greater degree of graphitization under dry sliding. The grooves of the patterned coatings could serve as a lubricant reservoir and trap the wear debris, which was beneficial for the tribological properties. The effect of the thickness of the patterned DLC films on their tribology behavior was also investigated. The 0.4-μm-thick patterned samples exhibited the lowest coefficients of friction of 0.105 and 0.058 under dry and oil lubrication conditions, respectively, while the 0.8-μm-thick patterned samples showed the lowest specific wear rate. In addition, the coefficients of friction of the patterned samples increased with an increase in the film thickness under oil lubrication conditions.

Funding

National Natural Science Foundation of China (51171028)

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Thin Solid Films

Volume

685

Pages

123 - 130

Publisher

Elsevier BV

Version

VoR (Version of Record)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Thin Solid Films and the definitive published version is available at https://doi.org/10.1016/j.tsf.2019.06.020.

Publication date

2019-06-14

Copyright date

2019

ISSN

0040-6090

Language

en

Depositor

Dr HAN ZHOU. Deposit date: 31 March 2020

Usage metrics

Categories

Exports