Microstructure and Tribological Behavior of CrN-Cu Nanocoatings Deposited by PVD Systems

Paper #:
  • 2016-01-0492

Published:
  • 2016-04-05
DOI:
  • 10.4271/2016-01-0492
Citation:
Kim, B., "Microstructure and Tribological Behavior of CrN-Cu Nanocoatings Deposited by PVD Systems," SAE Technical Paper 2016-01-0492, 2016, doi:10.4271/2016-01-0492.
Author(s):
Affiliated:
Pages:
4
Abstract:
The present study focused on CrN-Cu nanocoatings composed of nano-meter grains with CrN, Cr and Cu functioning low-friction, anti-wear and heat resistance. The coatings were synthesized by hybrid PVD including metal arc source, magentron sputter source and ion-gun source. Although Cu has low hardness, the hardness of CrNCu is not declined because it was composed of below 20nm sized grains of CrN, Cr, and Cu. However, CrN-Cu had lower friction than CrN owing to Cu’s low shear strength. CrN-Cu films optimized using the Reaction Surface Method (RSM) showed the excellent tribological behavior and low coefficient of friction compared with DLC. The tribological properties of the Cr-Cu-N demonstrated superior wear resistance and low friction at normal and high temperature conditions. The CrN-Cu nanocoatings can be used for the downsizing automotive engines working at severe tribological conditions.
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