Journal
BIOELECTROCHEMISTRY
Volume 121, Issue -, Pages 105-114Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2018.01.011
Keywords
Ti-6Al-4V; ZrO2/TiO2; Corrosion resistance; Wear; Cell behavior
Funding
- National Natural Science Foundation of China [31700834, 51671140, 31400815]
- Natural Science Foundation of Shanxi Province [2015021063]
- Qualified Personnel Foundation of Taiyuan University of Technology (QPFT) [tyutrc-2011257a]
- Shanxi Scholarship Council of China [2015-034]
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Ti-6Al-4V (TC4) has received increasing attention as biomaterial but also raised concerns about the long-term safety of releasing of metal ions and poor wear resistance. In this work, an ZrO2/TiO2 alloyed layer was prepared on TC4 by plasma surface alloying with Zr and subsequently annealed in the air for improved corrosion and wear resistant. To assess the corrosion performance of the alloyed layer, the specimens were measured by open circuit potential, electrochemical impedance spectroscopy and potentiodynamic polarization in simulated body fluid solution. The result shows that the ZrO2/TiO2 alloyed layer exhibits strikingly high polarization resistance, wide passive region and very low current density, indicating the excellent corrosion resistance. The layer also displays significant improvement of wear resistance. Furthermore, the alloyed layer restricts cell adhesion and spreading. We infer that the ZrO2/TiO2 alloyed layer might be potentially useful implanted devices such as biosensors, bioelectronics or drug delivery devices. (C) 2018 Elsevier B.V. All rights reserved.
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