Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys

Detalhes bibliográficos
Autor(a) principal: Costa, N. A. [UNESP]
Data de Publicação: 2021
Outros Autores: Correa, D. R.N., Lisboa-Filho, P. N. [UNESP], Sousa, T. S.P. [UNESP], Grandini, C. R. [UNESP], Rocha, L. A. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.surfcoat.2021.126856
http://hdl.handle.net/11449/208323
Resumo: Micro-arc oxidation (MAO) is a powerful tool to modify the surface of Ti alloys, in order to increase the lifetime of orthopedic implants. It is well established that the resulting oxide films are dependent on the parameters used during anodic treatment, however the influence of the substrate (bulk properties) is still a subject lacking for better understanding. This paper aims at studying the effect of molybdenum on characteristics of MAO films grown on promising Ti-15Zr-xMo alloys. The substrates were produced by arc-melting, and it was found to be constituted by α’ phase (Ti[sbnd]15Zr), α” + β phases (Ti-15Zr-5Mo), and only β phase (Ti-15Zr-10Mo and Ti-15Zr-15Mo). This β-stabilizing action of Mo was accompanied by modifications from lamellar to granular microstructures in the as-cast samples. After MAO treatment, Ti alloys containing Mo exhibited thinner oxide coatings with porous structures of smaller dimensions compared to the ones formed on Ti[sbnd]15Zr alloy, although the average pore shape has not been altered significantly. That film differences may be a result of changes in dielectric breakdown of the oxide through the formation of β phase in the bulk, while lamellar microstructures were also suppressed. Mo oxides (MoO3) were barely detected in the coatings, which were preferentially composed of TiO2 (anatase and rutile) and ZrO2. Regardless of the Mo content in the bulk, the coatings also showed CaCO3 and calcium phosphate compounds, indicating a successful incorporation of bioactive ions during MAO.
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spelling Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloysAnodic oxide characteristicsBiomaterialBulk propertiesMicro-arc oxidationTi-Zr-Mo alloyMicro-arc oxidation (MAO) is a powerful tool to modify the surface of Ti alloys, in order to increase the lifetime of orthopedic implants. It is well established that the resulting oxide films are dependent on the parameters used during anodic treatment, however the influence of the substrate (bulk properties) is still a subject lacking for better understanding. This paper aims at studying the effect of molybdenum on characteristics of MAO films grown on promising Ti-15Zr-xMo alloys. The substrates were produced by arc-melting, and it was found to be constituted by α’ phase (Ti[sbnd]15Zr), α” + β phases (Ti-15Zr-5Mo), and only β phase (Ti-15Zr-10Mo and Ti-15Zr-15Mo). This β-stabilizing action of Mo was accompanied by modifications from lamellar to granular microstructures in the as-cast samples. After MAO treatment, Ti alloys containing Mo exhibited thinner oxide coatings with porous structures of smaller dimensions compared to the ones formed on Ti[sbnd]15Zr alloy, although the average pore shape has not been altered significantly. That film differences may be a result of changes in dielectric breakdown of the oxide through the formation of β phase in the bulk, while lamellar microstructures were also suppressed. Mo oxides (MoO3) were barely detected in the coatings, which were preferentially composed of TiO2 (anatase and rutile) and ZrO2. Regardless of the Mo content in the bulk, the coatings also showed CaCO3 and calcium phosphate compounds, indicating a successful incorporation of bioactive ions during MAO.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNESP – Universidade Estadual Paulista Faculdade de CiênciasIBTN/Br – Brazilian Branch of the Institute of Biomaterials Tribocorrosion and NanomedicineIFSP – Federal Institute of Education Science and TechnologyCMEMS-UMinho – Center of MicroElectroMechanical Systems - Universidade do Minho, AzurémUNESP – Universidade Estadual Paulista Faculdade de CiênciasFAPESP: 00851-6/2015CNPq: 135334/2016-0CNPq: 143148/2015-0FAPESP: 2017/24300-4CNPq: 207417/2015-6CNPq: 307279/2013-8CNPq: 800571/2016-9CNPq: 800733/2014-2Universidade Estadual Paulista (Unesp)Tribocorrosion and NanomedicineScience and TechnologyCMEMS-UMinho – Center of MicroElectroMechanical Systems - Universidade do MinhoCosta, N. A. [UNESP]Correa, D. R.N.Lisboa-Filho, P. N. [UNESP]Sousa, T. S.P. [UNESP]Grandini, C. R. [UNESP]Rocha, L. A. [UNESP]2021-06-25T11:10:16Z2021-06-25T11:10:16Z2021-02-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.surfcoat.2021.126856Surface and Coatings Technology, v. 408.0257-8972http://hdl.handle.net/11449/20832310.1016/j.surfcoat.2021.1268562-s2.0-85099441020Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSurface and Coatings Technologyinfo:eu-repo/semantics/openAccess2024-04-25T17:40:09Zoai:repositorio.unesp.br:11449/208323Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:28:20.543362Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
title Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
spellingShingle Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
Costa, N. A. [UNESP]
Anodic oxide characteristics
Biomaterial
Bulk properties
Micro-arc oxidation
Ti-Zr-Mo alloy
title_short Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
title_full Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
title_fullStr Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
title_full_unstemmed Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
title_sort Influence of the molybdenum on characteristics of oxide films produced by micro-arc oxidation on Ti-15Zr-based alloys
author Costa, N. A. [UNESP]
author_facet Costa, N. A. [UNESP]
Correa, D. R.N.
Lisboa-Filho, P. N. [UNESP]
Sousa, T. S.P. [UNESP]
Grandini, C. R. [UNESP]
Rocha, L. A. [UNESP]
author_role author
author2 Correa, D. R.N.
Lisboa-Filho, P. N. [UNESP]
Sousa, T. S.P. [UNESP]
Grandini, C. R. [UNESP]
Rocha, L. A. [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Tribocorrosion and Nanomedicine
Science and Technology
CMEMS-UMinho – Center of MicroElectroMechanical Systems - Universidade do Minho
dc.contributor.author.fl_str_mv Costa, N. A. [UNESP]
Correa, D. R.N.
Lisboa-Filho, P. N. [UNESP]
Sousa, T. S.P. [UNESP]
Grandini, C. R. [UNESP]
Rocha, L. A. [UNESP]
dc.subject.por.fl_str_mv Anodic oxide characteristics
Biomaterial
Bulk properties
Micro-arc oxidation
Ti-Zr-Mo alloy
topic Anodic oxide characteristics
Biomaterial
Bulk properties
Micro-arc oxidation
Ti-Zr-Mo alloy
description Micro-arc oxidation (MAO) is a powerful tool to modify the surface of Ti alloys, in order to increase the lifetime of orthopedic implants. It is well established that the resulting oxide films are dependent on the parameters used during anodic treatment, however the influence of the substrate (bulk properties) is still a subject lacking for better understanding. This paper aims at studying the effect of molybdenum on characteristics of MAO films grown on promising Ti-15Zr-xMo alloys. The substrates were produced by arc-melting, and it was found to be constituted by α’ phase (Ti[sbnd]15Zr), α” + β phases (Ti-15Zr-5Mo), and only β phase (Ti-15Zr-10Mo and Ti-15Zr-15Mo). This β-stabilizing action of Mo was accompanied by modifications from lamellar to granular microstructures in the as-cast samples. After MAO treatment, Ti alloys containing Mo exhibited thinner oxide coatings with porous structures of smaller dimensions compared to the ones formed on Ti[sbnd]15Zr alloy, although the average pore shape has not been altered significantly. That film differences may be a result of changes in dielectric breakdown of the oxide through the formation of β phase in the bulk, while lamellar microstructures were also suppressed. Mo oxides (MoO3) were barely detected in the coatings, which were preferentially composed of TiO2 (anatase and rutile) and ZrO2. Regardless of the Mo content in the bulk, the coatings also showed CaCO3 and calcium phosphate compounds, indicating a successful incorporation of bioactive ions during MAO.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T11:10:16Z
2021-06-25T11:10:16Z
2021-02-25
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.surfcoat.2021.126856
Surface and Coatings Technology, v. 408.
0257-8972
http://hdl.handle.net/11449/208323
10.1016/j.surfcoat.2021.126856
2-s2.0-85099441020
url http://dx.doi.org/10.1016/j.surfcoat.2021.126856
http://hdl.handle.net/11449/208323
identifier_str_mv Surface and Coatings Technology, v. 408.
0257-8972
10.1016/j.surfcoat.2021.126856
2-s2.0-85099441020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Surface and Coatings Technology
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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
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