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Friction, nano wear and corrosion properties of electroplated nickel surfaces after dual implantation of Cr+ and N2 + ions. Influence of the implantation energy of the N2 + ions

AuthorsMuñoz-García, C. CSIC; Conde, A. CSIC ORCID; García, Ignacio CSIC ORCID; Fuentes, G. G.; Almandoz, E.; García, J. A.; Rodríguez, R.; Qin, Y.
Ion implantation
Issue Date2012
CitationSurface and Coatings Technology 210: 46-53 (2012)
AbstractIn this work, dual implantation of Cr + and N 2 + ions on electroplated Ni substrates have been investigated for N 2 + implantation energies of 140keV, 100keV and 60keV. The implanted specimens have been analyzed by glow discharge optical emission spectroscopy, X-ray diffraction, nano-indentation, coefficient of friction, nano-wear and potentiodynamic corrosion curves. The properties of the dual implanted samples have been compared to Cr + or N 2 + implanted specimens.The microstructural and mechanical properties of the Ni plates depend on the penetration ranges of the Cr and N atomic profiles obtained after the implantation process. The increase of hardness reduced the coefficient of friction of the samples and the wear rates. Preferential formation of Cr-N over Ni-N compounds has been observed when the Cr and N atomic profiles coexist within the Ni matrix.The potentiodynamic corrosion curves in acidic solutions revealed that the presence of Me-N species is detrimental for the chemical stability of the plates. Both nano-wear and corrosion properties are optimized when a Ni-N sublayer is formed underneath a top Cr-Ni implanted film. This is achieved by tuning the implantation energies of Cr + and N 2 + ions at 140keV. This bilayer structure could be a suitable treatment for micro-embossing dies for plastic texturing processes. © 2012 Elsevier B.V.
Identifiersdoi: 10.1016/j.surfcoat.2012.08.062
issn: 0257-8972
Appears in Collections:(CENIM) Artículos
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