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Tribological Behaviours of Titanium Nitride and Chromium Nitride Based PVD Coating Systems

[+] Author Affiliations
F. Cai, Xiao Huang

Carleton University, Ottawa, ON, Canada

Q. Yang

Nation Research Council, Ottawa, ON, Canada

Doug Nagy

Liburdi Engineering, Dundas, ON, Canada

Paper No. GT2012-68107, pp. 41-49; 9 pages
doi:10.1115/GT2012-68107
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4471-7
  • Copyright © 2012 by ASME

abstract

This study investigates the effects of the deposition process and coating composition on microstructural and tribological properties of TiN and CrN based coating systems. Coatings were produced using various PVD based processes — electron beam (EB), cathodic arc (CA) and plasma enhanced magnetron sputtering (PEMS). All coated samples were evaluated for their composition, microstructure and surface morphology. Coating mechanical properties such as hardness, Young’s modulus and coefficient of friction were also studied and related to their microstructures, wear and erosion resistances. It was found that hardness (H), Young’s modulus (E) and coefficient of friction had impact on both wear and erosion rates. In particular, the H3/E2 ratio was inversely proportional to the specific wear rate. For erosion behaviour, higher H3/E2 ratios relate to lower erosion rates at low impingement angles; whereas higher H3/E2 ratios relate to higher erosion rates at high impingement angles.

Copyright © 2012 by ASME

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