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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Nano-wear, nano-hardness and corrosion-resistance of electroplated nickel surfaces after co-implantation of Cr+ and N-2(+) ions

Conde, A. and Munoz-Garcia, C. and Garcia, I. and Fuentes, G. G. and Almandoz, E. and Garcia, J. A. and Rodriguez, R. J. and Qin, Y. (2011) Nano-wear, nano-hardness and corrosion-resistance of electroplated nickel surfaces after co-implantation of Cr+ and N-2(+) ions. Surface and Coatings Technology, 205 (19). pp. 4447-4452. ISSN 0257-8972

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Abstract

In this work, a successful sequential co-implantation treatment of Cr+ and N-2(+) ions into electrodeposited nickel plates is presented. The goal of this treatment is the simultaneous enhancement of the wear resistance. mechanical stability and corrosion-protection properties of the Ni surfaces. The ion-implanted surfaces have been characterized by glow-discharge optical-emission spectroscopy, X-ray diffraction, nano-hardness. roughness, nano-wear and potentio-dynamic corrosion tests. It has been observed that the implantation of Cr+ or N-2(+) alone is not sufficient to achieve simultaneously the enhancement of both the wear-resistance and the corrosion-protection properties. Conversely, the sequential implantation of Cr+ and N-2(+) at 140 keV and fluencies of 3 x 10(17) and 1.5 x 10(17) ions/cm(2) respectively, permits the formation of a functional surface capable of reducing both the corrosion rate and the wear rates, with respect to those exhibited by the un-implanted Ni surfaces. This treatment can be used to protect the surfaces of micro-embossing/stamping dies based on electroformed Nickel, as an alternative to other coating strategies. Furthermore, the ion implantation assures the non-modification of the net-shape and surface finish of these types of dies, which is of crucial importance when they are used for high-precision micro-texturing/imprinting applications.