A study of the erosion-corrosion of PVD CrN/NbN superlattice coatings in aqueous slurries

PURANDARE, Y. P., STACK, M. M. and HOVSEPIAN, P. E. (2005). A study of the erosion-corrosion of PVD CrN/NbN superlattice coatings in aqueous slurries. Wear, 259 (1-6), 256-262.

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Link to published version:: 10.1016/j.wear.2005.01.047

Abstract

New generation PVD coatings include advanced "superlattice" structures in which the combination of tribological and corrosion properties may optimized. Such coatings of the CrN/NbN type offer the possibility of enhanced wear and corrosion resistance. However, there has been little work carried out to date to identify the mechanisms of wear of these coatings in environments where solid particles may impact the surface in corrosive conditions. In this paper, the erosion-corrosion performance of M2 tool steel coated with PVD CrN/NbN superlattice coatings, produced by unbalanced magnetron sputtering with bias voltage of -75 V, was assessed and compared to the uncoated tool steel substrate. The results indicated that the performance of the coating depended on the impact angle and the applied potential. The overall erosion-corrosion resistance of the coated samples was found to be superior to that of the uncoated samples; however, the relative protection depended on the impact angle and the applied potential. Possible reasons for such behaviour are described in this paper. (c) 2005 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: 15th International Conference on Wear of Materials APR 24-28, 2005, San Diego, CA Part 1 Sp. Iss. SI
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1016/j.wear.2005.01.047
Depositing User: Ann Betterton
Date Deposited: 17 Feb 2010 16:33
Last Modified: 01 Mar 2010 17:21
URI: http://shura.shu.ac.uk/id/eprint/1143

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