Effect on thermal oxidation in TiO2 nanostructures on nanohardness and corrosion resistance
This article aimed to analyze the effect of the thermal oxidation in the corrosion resistance and the hardness properties of TiO2 nanostructures obtained by the anodizing process in the HF/H3PO4 solution. TiO2 nanostructures on Ti6Al4V obtained by anodizing processes were subjected to thermal oxidat...
- Autores:
-
Muñoz Mizuno, Andrea
Cely Baustista, Maria Mercedes
Jaramillo Colpas, Javier Enrique
Hincapie, Duberney
Calderón Hernández, José Wilmar
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2020
- Institución:
- Corporación Universidad de la Costa
- Repositorio:
- REDICUC - Repositorio CUC
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.cuc.edu.co:11323/7677
- Acceso en línea:
- https://hdl.handle.net/11323/7677
http://dx.doi.org/10.4067/S0718-33052020000300362.
https://repositorio.cuc.edu.co/
- Palabra clave:
- Nanostructures
TiO2
Nanohardness
EIS
Thermal oxidation
Nanostructuras
Nanodureza
Oxidación térmica
- Rights
- openAccess
- License
- CC0 1.0 Universal
Summary: | This article aimed to analyze the effect of the thermal oxidation in the corrosion resistance and the hardness properties of TiO2 nanostructures obtained by the anodizing process in the HF/H3PO4 solution. TiO2 nanostructures on Ti6Al4V obtained by anodizing processes were subjected to thermal oxidation (TO) treatments over a temperature range from 500 ºC to 620 ºC for 2 hours. Surface morphology was evaluated by using scanning electron microscopy; the hardness properties of TiO2 nanostructures were obtained by Nanoindentation measurements using a Berkovich probe with a tip radius of 150 mm. The corrosion behavior of the samples was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that TiO2 nanostructures, modified by thermal oxidation, increased the surface properties of hardness and corrosion resistance, compared to the substrate, maintaining its mixed or tubular structure. On the other hand, a transformation of nanotubes to nanopores after 600ºC was evidenced, generating significant changes in the mechanical properties of these structures. |
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