Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Scratch response and tribological behaviour of CrAlNiN coatings deposited by closed field unbalanced magnetron sputtering system|
|Citation:||Surface and Coatings Technology, 2019; 367:30-40|
|Chuhan Sha, Zhifeng Zhou, Zonghan Xie, Paul Munroe|
|Abstract:||CrAlNiN coatings were deposited on M2 tool steels using closed-field unbalanced magnetron sputtering. The coating microstructure transformed from coarse columnar grains to fine equiaxed grains with increasing Ni content, which was accompanied by a general decrease in both hardness (H) and elastic modulus (Er) values. The scratch tests showed both scratch toughness and adhesion strength were improved for coatings with higher ratios of H/Er and H³/Er², whereby higher critical loads (Lc₁ and Lc₂) are required to initiate cohesive and adhesive failure. For the coatings with coarser columnar grains, the improved scratch toughness may be ascribed to tortuous crack deflection patterns. Improved wear resistance was found in the columnar grained coatings, which also exhibited the higher H/Er and H³/Er² values. The inferior wear resistance in the equiaxed grained coatings was suggested to arise from these coatings being more susceptible to grain pull-out processes during abrasive sliding. The wear debris composed of tribo-oxides serving as additional capacity for load bearing via re-distribution of the applied stress. This was believed to boost the wear resistance of the coatings.|
|Keywords:||Chromium aluminium nickel nitride; magnetron sputtering; microstructure; mechanical properties; scratch response; wear resistance|
|Rights:||© 2019 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Aurora harvest 4|
Mechanical Engineering publications
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.