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https://hdl.handle.net/2440/114090
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Type: | Journal article |
Title: | Study of the structure, properties, scratch resistance and deformation behaviour of graded Cr-CrN-Cr(1-x)AlxN coatings |
Author: | Kabir, M. Munroe, P. Zhou, Z. Xie, Z. |
Citation: | Ceramics International, 2018; 44(10):11364-11373 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0272-8842 1873-3956 |
Statement of Responsibility: | Mohammad Sharear Kabir, Paul Munroe, Zhifeng Zhou, Zonghan Xie |
Abstract: | An in-depth investigation of the structure, properties, scratch adhesion characteristics of graded Cr-CrN-Cr(1-x)AlxN coatings synthesized onto M42 steel substrates using closed – field unbalanced magnetron sputtering (CFUBMS) was carried out. Advanced microscopy (scanning and transmission electron microscopy), focused ion beam (FIB) imaging, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and micro–scratch tests was used to investigate the microstructure, mechanical properties and scratch performance as a function of Al content. FIB and TEM investigations revealed that the coatings exhibited a distinct structure; i.e., an adhesive Cr layer, a CrN transition layer and a graded CrAlN top layer with a face centered cubic (FCC) B1 structure. A columnar morphology was exhibited by the coatings and the dimensions of the columnar grains decreased with increasing Al content. Residual stress measurements, obtained from the XRD – sin2ψ method, revealed increasing compressive stresses with increasing Al content. Furthermore, nanoindentation tests showed an increase in mechanical properties, fracture toughness index (H/E) and plastic deformation resistance (H3/E2) as the Al content increased, accompanied by a decrease in the critical load, LC, during scratch testing implying a decrease in scratch toughness. |
Keywords: | Graded coating; unbalanced magnetron sputtering; plastic deformation resistance (H3/E2); nanoindentation; adhesion |
Rights: | © 2018 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
DOI: | 10.1016/j.ceramint.2018.03.187 |
Grant ID: | http://purl.org/au-research/grants/arc/DP150102417 |
Published version: | http://dx.doi.org/10.1016/j.ceramint.2018.03.187 |
Appears in Collections: | Aurora harvest 3 Mechanical Engineering publications |
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