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Electrochemical study of beta metastable titanium alloys coated with TiO2 nanostructured films


The aim of this work is to contribute to the development of titanium alloys for orthopedic and dental implants evaluating the electrochemical behavior of nanostructured TiO2 surfaces. Beta metastable alloys have attractive properties for use as materials for biomedical implants. Such alloys are easily cold worked and when subjected to annealing and aging heat treatment it is possible to obtain an ideal combination of low elasticity modulus and superior mechanical strength due to the reduction of grain size and combination of phases. At the same time, the surface characteristics of these alloys should be optimized to ensure good interaction between bones and the implant material. Thus, the formation of a thin layer of nanostructured TiO2 may be interesting to increase biocompatibility and corrosion resistance and thereby, stimulate bone growth. Samples of Ti-Nb-Sn and Ti-Nb-Zr alloys will be prepared in an arc voltaic furnace, homogenized at high temperatures, cold worked and recrystallized. Following after microstructural and mechanical characterization, these samples will follow routes of electrochemical anodization and heat treatments that allow to form a layer of nanostructured TiO2, amorphous or crystalline and hence, change the characteristics of corrosion which will be evaluated by anodic polarization and electrochemical impedance (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FATICHI, ALBERTO Z.; MELLO, MARIANA G.; CARAM, RUBENS; CREMASCO, ALESSANDRA. Self-organized TiO2 nanotube layer on Ti-Nb-Zr alloys: growth, characterization, and effect on corrosion behavior. Journal of Applied Electrochemistry, v. 49, n. 11, p. 1079-1089, . (16/24693-3, 14/00159-2)
TAIPINA, MARCIA O.; DE MELLO, MARIANA G.; TAMBORLIN, LETICIA; PEREIRA, KARINA D.; LUCHESSI, AUGUSTO D.; CREMASCO, ALESSANDRA; CARAM, RUBENS. A novel Ag doping Ti alloys route: Formation and antibacterial effect of the TiO2 nanotubes. Materials Chemistry and Physics, v. 261, . (19/06951-3, 16/24693-3, 17/21914-1, 14/00159-2)
CREMASCO, A.; LOPES, E. S. N.; BERTAZZOLI, R.; CARAM, R.. Application of coupled substrate aging and TiO2 nanotube crystallization heat treatments in cold-rolled Ti-Nb-Sn alloys. Journal of Materials Science, v. 51, n. 13, p. 6389-6399, . (14/00159-2)
MELLO, M. G.; TAIPINA, M. O.; RABELO, G.; CREMASCO, A.; CARAM, R.. Production and characterization of TiO2 nanotubes on Ti-Nb-Mo-Sn system for biomedical applications. SURFACE & COATINGS TECHNOLOGY, v. 326, n. A, p. 126-133, . (14/06099-1, 14/00159-2)
DE MELLO, MARIANA G.; DAINESE, BEATRIZ P.; CARAM, RUBENS; CREMASCO, ALESSANDRA. Influence of heating rate and aging temperature on omega and alpha phase precipitation in Ti-35Nb alloy. MATERIALS CHARACTERIZATION, v. 145, p. 268-276, . (14/00159-2, 16/24693-3)
FATICHI, ALBERTO Z.; DE MELLO, MARIANA G.; PEREIRA, KARINA D.; ANTONIO, LUISA G. M.; LUCHESSI, AUGUSTO D.; CARAM, RUBENS; CREMASCO, ALESSANDRA. Crystalline phase of TiO2 nanotube arrays on Ti-35Nb-4Zr alloy: Surface roughness, electrochemical behavior and cellular response. CERAMICS INTERNATIONAL, v. 48, n. 4, p. 5154-5161, . (16/24693-3, 14/00159-2)

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