Title: Influence of substrate structure on the development of stress anisotropy in CrN coatings

Authors: F. Gauzzi, G. Gusmano, F.R. Lamastra, R. Montanari, T. Valente

Addresses: Rome University 'Tor Vergata', Department of Mechanical Engineering, Via del Politecnico 1, 00133 Rome, Italy. ' Rome University 'Tor Vergata', Department of Chemical Science and Technology, Via della Ricerca Scientifica 1, 00133 Rome, Italy; INSTM Research Unit Rome Tor Vergata. ' Rome University 'Tor Vergata', Department of Chemical Science and Technology, Via della Ricerca Scientifica 1, 00133 Rome, Italy; INSTM Research Unit Rome Tor Vergata. ' Rome University 'Tor Vergata', Department of Mechanical Engineering, Via del Politecnico 1, 00133 Rome, Italy. ' Rome University 'La Sapienza', Department of Chemical and Materials Engineering, Via Eudossiana 18, 00184 Rome, Italy; INSTM Research Unit Rome La Sapienza

Abstract: CrN/Cr/CrN coatings were obtained by Cathodic Arc (CA) Physical Vapour Deposition (PVD) evaporation on three steels (AISI H13, AISI 1040, K340). The structure of the steels before and after deposition was examined by X-Ray Diffraction (XRD). The results show the presence of elastic stresses, compressive in the coating, tensile in the substrate. Computer simulations were employed to describe the atomic positions in the layers of steel and CrN forming the interface under different reciprocal orientations. The results indicate that the {100} texture of the substrate minimises stress level and leads to same stress values along any two perpendicular directions.

Keywords: cathodic arc PVD; physical vapour deposition; stress anisotropy; CrN coatings; steel substrates; XRD; X-ray diffraction; texture; substrate structure; wear resistance; corrosion resistance; multilayer coatings; chromium nitride; elastic stress.

DOI: 10.1504/IJSURFSE.2008.021346

International Journal of Surface Science and Engineering, 2008 Vol.2 No.5, pp.337 - 349

Published online: 20 Nov 2008 *

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