Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Capítulo de livro |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/227593 |
Resumo: | Casting of Ti-Mo alloys having different Mo content (4 to 20 wt%) was performed by arcmelting of pure metals. These alloys present interesting features for potential biomedical applications, e.g., in artificial proteases, owing the favorable characteristics of Ti alloys: apart from mechanical properties and good osseointegration, the strong corrosion resistance in biological environment and the low toxicity of their corrosion products The corrosion and anodic behavior of the different alloys was investigated in different electrolytes, including neutral, acidic and chloride-containing solutions. A strong tendency to passivation was observed, caused by the oxygen affinity of the metallic material. However, partial Mo dissolution is likely to occur at very low pH Composition and solid-state properties of the passive films were studied by ex-situ XPS, in-situ photoelectrochemical and impedance experiments. Films were found to consist of a mixed oxide phase, mainly containing TiO2 and bearing small concentrations of MoO3. The latter depends on starting alloy composition and film thickness As a result, also the behavior of the passive films depends on these two factors. In fact thin films or films grown on alloys bearing a small Mo content display n-type semiconducting behavior, analogous to what reported for pure TiO2. On the contrary, films grown on alloys with higher Mo content are more resistive and change their behavior from semiconducting to insulating with increasing thickness. © 2010 Nova Science Publishers, Inc. All rights reserved. |
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Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film propertiesCasting of Ti-Mo alloys having different Mo content (4 to 20 wt%) was performed by arcmelting of pure metals. These alloys present interesting features for potential biomedical applications, e.g., in artificial proteases, owing the favorable characteristics of Ti alloys: apart from mechanical properties and good osseointegration, the strong corrosion resistance in biological environment and the low toxicity of their corrosion products The corrosion and anodic behavior of the different alloys was investigated in different electrolytes, including neutral, acidic and chloride-containing solutions. A strong tendency to passivation was observed, caused by the oxygen affinity of the metallic material. However, partial Mo dissolution is likely to occur at very low pH Composition and solid-state properties of the passive films were studied by ex-situ XPS, in-situ photoelectrochemical and impedance experiments. Films were found to consist of a mixed oxide phase, mainly containing TiO2 and bearing small concentrations of MoO3. The latter depends on starting alloy composition and film thickness As a result, also the behavior of the passive films depends on these two factors. In fact thin films or films grown on alloys bearing a small Mo content display n-type semiconducting behavior, analogous to what reported for pure TiO2. On the contrary, films grown on alloys with higher Mo content are more resistive and change their behavior from semiconducting to insulating with increasing thickness. © 2010 Nova Science Publishers, Inc. All rights reserved.Grupo de Biomateriais Department de Físico-Química Instituto de Química/UNESP, Araraquara - SPDipartimento di Ingegneria Chimica dei Processi e dei Materiali Università di Palermo, Viale delle Scienze, 90128 PalermoGrupo de Biomateriais Department de Físico-Química Instituto de Química/UNESP, Araraquara - SPUniversidade Estadual Paulista (UNESP)Università di PalermoOliveira, N. T.C. [UNESP]Guastaldi, A. C. [UNESP]Piazza, S.Sunseri, C.2022-04-29T07:14:00Z2022-04-29T07:14:00Z2010-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookPart365-384Titanium Alloys: Preparation, Properties and Applications, p. 365-384.http://hdl.handle.net/11449/2275932-s2.0-84895221249Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengTitanium Alloys: Preparation, Properties and Applicationsinfo:eu-repo/semantics/openAccess2022-04-29T07:14:00Zoai:repositorio.unesp.br:11449/227593Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:34:01.209959Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
title |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
spellingShingle |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties Oliveira, N. T.C. [UNESP] |
title_short |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
title_full |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
title_fullStr |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
title_full_unstemmed |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
title_sort |
Ti-Mo cast alloys for biomedical applications. Anodic behavior and passive film properties |
author |
Oliveira, N. T.C. [UNESP] |
author_facet |
Oliveira, N. T.C. [UNESP] Guastaldi, A. C. [UNESP] Piazza, S. Sunseri, C. |
author_role |
author |
author2 |
Guastaldi, A. C. [UNESP] Piazza, S. Sunseri, C. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Università di Palermo |
dc.contributor.author.fl_str_mv |
Oliveira, N. T.C. [UNESP] Guastaldi, A. C. [UNESP] Piazza, S. Sunseri, C. |
description |
Casting of Ti-Mo alloys having different Mo content (4 to 20 wt%) was performed by arcmelting of pure metals. These alloys present interesting features for potential biomedical applications, e.g., in artificial proteases, owing the favorable characteristics of Ti alloys: apart from mechanical properties and good osseointegration, the strong corrosion resistance in biological environment and the low toxicity of their corrosion products The corrosion and anodic behavior of the different alloys was investigated in different electrolytes, including neutral, acidic and chloride-containing solutions. A strong tendency to passivation was observed, caused by the oxygen affinity of the metallic material. However, partial Mo dissolution is likely to occur at very low pH Composition and solid-state properties of the passive films were studied by ex-situ XPS, in-situ photoelectrochemical and impedance experiments. Films were found to consist of a mixed oxide phase, mainly containing TiO2 and bearing small concentrations of MoO3. The latter depends on starting alloy composition and film thickness As a result, also the behavior of the passive films depends on these two factors. In fact thin films or films grown on alloys bearing a small Mo content display n-type semiconducting behavior, analogous to what reported for pure TiO2. On the contrary, films grown on alloys with higher Mo content are more resistive and change their behavior from semiconducting to insulating with increasing thickness. © 2010 Nova Science Publishers, Inc. All rights reserved. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-12-01 2022-04-29T07:14:00Z 2022-04-29T07:14:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bookPart |
format |
bookPart |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Titanium Alloys: Preparation, Properties and Applications, p. 365-384. http://hdl.handle.net/11449/227593 2-s2.0-84895221249 |
identifier_str_mv |
Titanium Alloys: Preparation, Properties and Applications, p. 365-384. 2-s2.0-84895221249 |
url |
http://hdl.handle.net/11449/227593 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Titanium Alloys: Preparation, Properties and Applications |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
365-384 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128948454817792 |