Effect of Ni content on the microstructure and mechanical behaviour of CrAlNiN coatings deposited by closed field unbalanced magnetron sputtering
Date
2019
Authors
Sha, C.
Munroe, P.
Zhou, Z.
Xie, Z.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Surface and Coatings Technology, 2019; 357:445-455
Statement of Responsibility
Chuhan Sha, Paul Munroe, Zhifeng Zhou, Zonghan Xie
Conference Name
Abstract
Ni incorporation is known to impose an intriguing influence on the composition, microstructure and mechanical properties of nitride-based coatings prepared by physical vapour deposition. This work examined the effect of varying Ni concentrations, controlled by NiCr alloy target current (INiCr), on the microstructures and properties of CrAlNiN coatings deposited on to M2 tool steel substrates. These coatings were deposited by closed field unbalanced magnetron sputtering (CFUMS). The composition and structure of the as-deposited coatings were investigated by XPS, XRD, FIB, and TEM. Residual stresses were determined using the XRD-sin2ψ method. Nanoindentation tests were performed to assess mechanical properties of the CrAlNiN outer layer. At relatively low INiCr values, below 3 A, the grains within CrAlNiN layer underwent refinement, yet maintained a columnar structure. At higher INiCr values, from 3 to 5 A, the columnar grains transitioned into more equiaxed grains. Hardness values of 25–28 GPa at low INiCr values were associated with the high residual compressive stress, solid solution hardening and grain refinement.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2018 Elsevier B.V. All rights reserved.