RT info:eu-repo/semantics/article
T1 Electrochemical characterization of pulsed layer deposited hydroxyapatite zirconia layers on Ti-21Nb-15Ta-6Zr alloy for biomedical application
A1 Souto, Ricardo Manuel
A1 Izquierdo Pérez, Javier
A1 Bolat, Georgiana
A1 Cimpoesu, Nicanor
A1 Trincă, Lucia Carmen
A1 Mareci, Daniel
K1 Ti alloys
K1 Pulsed layer deposition
K1 hydroxyapatite-zirconia coating
K1 electrochemical impedance spectroscopy
K1 scanning electrochemical microscopy
K1 biomaterial
AB A new titanium base Ti-21Nb-15Ta-6Zr alloy covered with hydroxyapatite-zirconia (HA-ZrO2) by pulsed laser deposition (PLD) technique was characterized regarding its corrosion resistance in simulated physiological Ringer’s solution at 37 °C. For the sake of comparison, Ti-6Al-4V standard implant alloy, with and without hydroxyapatite-zirconia coating, was also characterized. Multiscale electrochemical analysis using both conventional averaging electrochemical techniques, namely electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization, and spatially-resolved microelectrochemical techniques (scanning electrochemical microscopy, SECM) were used to investigate the electrochemical behaviour of the materials. In addition, scanning electron microscopy evidenced that no relevant surface morphology changes occurred on the materials upon immersion in the simulated physiological solution, despite variations in their electrochemical behaviour. Although uncoated metals appear to show better performances during conventional corrosion tests, the response is still quite similar for the HA–ZrO2 coated materials while providing superior resistance towards electron transfer due to the formation of a more dense film on the surface, thus effectively behaving as a passive material. It is believed corrosion of the HA–ZrO2 coated Ti-21Nb-15Ta-6Zr alloy will have negligible effect upon biochemical and cellular events at the bone-implant interface and could facilitate osseointegration
YR 2016
FD 2016
LK http://riull.ull.es/xmlui/handle/915/19052
UL http://riull.ull.es/xmlui/handle/915/19052
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-abr-2024