Per citar aquest document: http://ddd.uab.cat/record/147128
Improvement to the Corrosion Resistance of Ti-Based Implants Using Hydrothermally Synthesized Nanostructured Anatase Coatings
Lorenzetti, Martina (Jožef Stefan Institute. Department for Nanostructured Materials (Ljubljana, Eslovènia))
Pellicer Vilà, Eva M. (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Baró, M.D. (Universitat Autònoma de Barcelona. Departament de Física)
Kovač,Janez (Jožef Stefan Institute. Department for Nanostructured Materials (Ljubljana, Eslovènia))
Novak, Saša (Jožef Stefan Institute. Department for Nanostructured Materials (Ljubljana, Eslovènia))
Kobe, Spomenka (Jožef Stefan Institute. Department for Nanostructured Materials (Ljubljana, Eslovènia))

Data: 2014
Resum: The electrochemical behavior of polycrystalline TiO2 anatase coatings prepared by a one-step hydrothermal synthesis on commercially pure (CP) Ti grade 2 and a Ti13Nb13Zr alloy for bone implants was investigated in Hank’s solution at 37. 5 °C. The aim was to verify to what extent the in-situ-grown anatase improved the behavior of the substrate in comparison to the bare substrates. Tafel-plot extrapolations from the potentiodynamic curves revealed a substantial improvement in the corrosion potentials for the anatase coatings. Moreover, the coatings grown on titanium also exhibited lower corrosion-current densities, indicating a longer survival of the implant. The results were explained by considering the effects of crystal morphology, coating thickness and porosity. Evidence for the existing porosity was obtained from corrosion and nano-indentation tests. The overall results indicated that the hydrothermally prepared anatase coatings, with the appropriate morphology and surface properties, have attractive prospects for use in medical devices, since better corrosion protection of the implant can be expected.
Nota: Número d'acord de subvenció EC/FP7/264635
Nota: Número d'acord de subvenció MICINN/MAT2011-27380-C02-01
Nota: Número d'acord de subvenció AGAUR/2009/SGR-1292
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Titanium dioxide crystalline coating ; Corrosion resistance ; Nanomechanical behavior ; Biomaterial
Publicat a: Materials, Vol. 7 (2014) , p. 180-194, ISSN 1996-1944

DOI: 10.3390/ma7010180


15 p, 918.6 KB

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