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Díaz, C., Lutz, J., Mandl, S., García, J.A., Martínez, R., Rodríguez, R.J., Damborenea, J.J., Arenas, M.A. and Conde, A. (2008) Comparison of Tribological Behaviour and Biocompatibility of Ti6Al4V Alloy after Ion Implantation or Thermal Oxidation. Physica Status Solidi (C), 5, 947-951. http://dx.doi.org/10.1002/pssc.200778310

has been cited by the following article:

• TITLE: Nanomodificated Surface CoCr Alloy for Corrosion Protection of MoM Prosthesis

  AUTHORS: Cristina Díaz, Stephan Mändl, Rosario Pereiro, Beatriz Fernández

  KEYWORDS: Plasma Immersion Ion Implantation, THR, Nanoparticles, Ion Release

  JOURNAL NAME: Journal of Biomaterials and Nanobiotechnology, Vol.6 No.2, March 24, 2015

  ABSTRACT: Problems in metal-on-metal (MoM) hip replacement systems still persist due to high wear rates, low corrosion resistance and release of toxic ions and nanoparticles. As a consequence of these effects, failure, infections, loosening or bone resorption is the typical problems in the hip prosthesis. In order to reduce failure due to corrosion and/or releasing ions and particles, this study presents some works in a novel nanoscale surface modification of cobalt-chromium alloy (CoCr) for obtaining improved surface conditions in these alloys for these applications. Improving corrosion resistant of these alloys and achieving a low wear rate are possible to reduce the total released ions and particles released from the surface of this material. According to it, three different treatments using oxygen at temperatures of 300°C, 350°C and 400°C were carried out by plasma immersion ion implantation technique (PI3). X-ray diffraction (XRD) analysis shows an increase in the formation of chromium oxides in the outer surface of the CoCr alloy. It allows improving in corrosion resistant in CoCr alloys. Moreover, total quantity of released Co, Cr and Mo ions have been reduced. Wear rate studies showed a very similar behaviour after the treatments in relation to untreated CoCr alloy and release rate from the treated surface of CoCr alloys was reduced in comparison with untreated CoCr alloy.