Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 770, Issue -, Pages 1038-1048Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.154
Keywords
Metals and alloys; Titanium; Dental implant; Surface property; Corrosion; Bioactive coating
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Funding
- Sao Paulo State Research Foundation (FAPESP), Brazil [2016/11470-6, 2017/01320-0]
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This study developed an experimental quaternary titanium (Ti) alloy and evaluated its surface properties and electrochemical stability. The viability for a biofunctional surface treatment was also tested. Ti-35Nb-7Zr-5Ta (wt%) alloy was developed from pure metals. Commercially pure titanium (cpTi) and Ti-6Al-4V were used as controls. All groups had two surface conditions: untreated (machined surface) and modified by plasma electrolytic oxidation (PEO) (treated surface). The experimental alloy was successfully synthesized and exhibited beta microstructure. PEO treatment created a porous surface with increased roughness, surface free energy, hardness and electrochemical stability (p <0.05). For the machined surfaces, the Ti-Nb-Zr-Ta alloy presented the lowest hardness and elastic modulus (p <0.05) and displayed greater polarization resistance relative to cpTi. Only PEO-treated cpTi and Ti-Al-V alloys exhibited anatase and rutile as crystalline structures. The beta experimental Ti-Nb-Zr-Ta alloy seems to be a good alternative for the manufacture of dental implants, since it presents elastic modulus closer to that of bone, feasibility for surface treatment, electrochemical stability and absence of toxic elements. (C) 2018 Elsevier B.V. All rights reserved.
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