Scratch resistance and wear of CrNx coatings

VAN ESSEN, P., HOY, R., KAMMING, J. D., EHIASARIAN, A. P. and JANSSEN, G. (2006). Scratch resistance and wear of CrNx coatings. Surface and Coatings Technology, 200 (11), 3496-3502.

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Abstract

Hard CrNx coatings of 3.3-4.1 mu m in thickness were deposited by means of reactive sputter deposition in an industrial PVD coater. The coatings were deposited under various N-2 flows on high-speed steel (HSS) and hot work tool steel (HWTS). For all coatings, the hardness, reduced modulus and density were approximately 30 GPa, 240 GPa and 6400 kg /m(3), respectively. The composition, however, varied with the N-2 flow from CrN0.6 to CrN1.0. The coatings were subjected to scratch testing with a diamond Rockwell stylus under a progressive load. From the scratch tests, the critical load for the onset of chipping and/or spalling for each coating was determined. The tribological properties of the coatings were characterised by pin-on-disk testing employing an Al2O3 ball as counter part. The wear track depth profile measured with a laser scanning confocal microscope was used to obtain the wear area. From the wear area, the specific wear rate was determined. The CrN1.0 coatings outperform the CrN0.6 coatings with respect to specific wear rate and critical load. For the CrN0.6 coating, similar failure was observed in both the wear test and the scratch tests. The similarity of failure in both tests is discussed. (c) 2004 Elsevier B.V. All rights reserved.

Item Type:	Article
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Nanotechnology Centre for PVD Research
Identification Number:	https://doi.org/10.1016/j.surfcoat.2004.09.020
Page Range:	3496-3502
Depositing User:	Ann Betterton
Date Deposited:	23 Feb 2010 17:19
Last Modified:	18 Mar 2021 21:30
URI:	https://shura.shu.ac.uk/id/eprint/1202

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