Cargando…
Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments
The bio- and hemocompatibility of titanium alloys are due to the formation of a TiO(2) layer. This natural oxide may have fissures which are detrimental to its properties. Anodic oxidation is used to obtain thicker films. By means of this technique, at low voltages oxidation, amorphous and low rough...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4345073/ https://www.ncbi.nlm.nih.gov/pubmed/25784939 http://dx.doi.org/10.1155/2015/395657 |
_version_ | 1782359525754404864 |
---|---|
author | Vera, María Laura Rosenberger, Mario Roberto Schvezov, Carlos Enrique Ares, Alicia Esther |
author_facet | Vera, María Laura Rosenberger, Mario Roberto Schvezov, Carlos Enrique Ares, Alicia Esther |
author_sort | Vera, María Laura |
collection | PubMed |
description | The bio- and hemocompatibility of titanium alloys are due to the formation of a TiO(2) layer. This natural oxide may have fissures which are detrimental to its properties. Anodic oxidation is used to obtain thicker films. By means of this technique, at low voltages oxidation, amorphous and low roughness coatings are obtained, while, above a certain voltage, crystalline and porous coatings are obtained. According to the literature, the crystalline phases of TiO(2), anatase, and rutile would present greater biocompatibility than the amorphous phase. On the other hand, for hemocompatible applications, smooth and homogeneous surfaces are required. One way to obtain crystalline and homogeneous coatings is by heat treatments after anodic oxidation. The aim of this study is to evaluate the influence of heat treatments on the thickness, morphology, and crystalline structure of the TiO(2) anodic coatings. The characterization was performed by optical and scanning electron microscopy, X-ray diffraction, and X-ray reflectometry. Coatings with different colors of interference were obtained. There were no significant changes in the surface morphology and roughness after heat treatment of 500°C. Heat treated coatings have different proportions of the crystalline phases, depending on the voltage of anodic oxidation and the temperature of the heat treatment. |
format | Online Article Text |
id | pubmed-4345073 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-43450732015-03-17 Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments Vera, María Laura Rosenberger, Mario Roberto Schvezov, Carlos Enrique Ares, Alicia Esther Int J Biomater Research Article The bio- and hemocompatibility of titanium alloys are due to the formation of a TiO(2) layer. This natural oxide may have fissures which are detrimental to its properties. Anodic oxidation is used to obtain thicker films. By means of this technique, at low voltages oxidation, amorphous and low roughness coatings are obtained, while, above a certain voltage, crystalline and porous coatings are obtained. According to the literature, the crystalline phases of TiO(2), anatase, and rutile would present greater biocompatibility than the amorphous phase. On the other hand, for hemocompatible applications, smooth and homogeneous surfaces are required. One way to obtain crystalline and homogeneous coatings is by heat treatments after anodic oxidation. The aim of this study is to evaluate the influence of heat treatments on the thickness, morphology, and crystalline structure of the TiO(2) anodic coatings. The characterization was performed by optical and scanning electron microscopy, X-ray diffraction, and X-ray reflectometry. Coatings with different colors of interference were obtained. There were no significant changes in the surface morphology and roughness after heat treatment of 500°C. Heat treated coatings have different proportions of the crystalline phases, depending on the voltage of anodic oxidation and the temperature of the heat treatment. Hindawi Publishing Corporation 2015 2015-02-15 /pmc/articles/PMC4345073/ /pubmed/25784939 http://dx.doi.org/10.1155/2015/395657 Text en Copyright © 2015 María Laura Vera et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Vera, María Laura Rosenberger, Mario Roberto Schvezov, Carlos Enrique Ares, Alicia Esther Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title | Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title_full | Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title_fullStr | Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title_full_unstemmed | Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title_short | Fabrication of TiO(2) Crystalline Coatings by Combining Ti-6Al-4V Anodic Oxidation and Heat Treatments |
title_sort | fabrication of tio(2) crystalline coatings by combining ti-6al-4v anodic oxidation and heat treatments |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4345073/ https://www.ncbi.nlm.nih.gov/pubmed/25784939 http://dx.doi.org/10.1155/2015/395657 |
work_keys_str_mv | AT veramarialaura fabricationoftio2crystallinecoatingsbycombiningti6al4vanodicoxidationandheattreatments AT rosenbergermarioroberto fabricationoftio2crystallinecoatingsbycombiningti6al4vanodicoxidationandheattreatments AT schvezovcarlosenrique fabricationoftio2crystallinecoatingsbycombiningti6al4vanodicoxidationandheattreatments AT aresaliciaesther fabricationoftio2crystallinecoatingsbycombiningti6al4vanodicoxidationandheattreatments |