TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique

Autores
Kociubczyk, Alex Iván; Vera, Maria Laura; Schvezov, Carlos Enrique; Heredia, Eduardo; Ares, Alicia Esther
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
For the construction of a new design of mechanical heart valve a Ti-6Al-4V alloy was selected and coated with TiO2 due to it corrosion resistance and biocompatibility. A required feature on surfaces in contact with blood it is a low level of roughness (Ra ≤ 50 nm) that not favor the formation of blood clots. One technique that can be used to obtain smooth coatings of TiO2 is the electrochemical anodic oxidation technique using pre-spark oxidation voltage. The phenomenon of spark produces porous oxides and roughness higher than desired. The beginning of the spark voltage depends on the electrolyte used. The present work compares the coatings obtained by anodic oxidation of the Ti-6Al-4V alloy applying different voltages (from 10V to 50V), using as electrolyte an aqueous based alkaline solutions of NaOH and KOH, at different concentrations (0.1M, 1M and 2M) and Ca(OH)2 at a concentration of 0.02 M, using a constant current of 50mA to achieve the desired voltage. Morphological analysis of the different oxides is performed using optical microscopy, and roughness measurements using a profilometer. The phases present were analyzed by X-ray diffraction technique with a glancing angle of 1º. By varying the applied voltage coatings of different interference colors were obtained. The morphology and roughness of the obtained oxides varied according to the applied voltage in each experience. With KOH and NaOH 1M the spark occurred at 46V and 41V, respectively. The start voltage of the spark decreased to 34V and 29V, respectively, when the electrolyte concentration increase from 1M to 2M. In pre-spark conditions oxides were of an average roughness of 22 nm. After the spark, the oxides became with roughness of 700 nm, limiting the oxidation conditions for the desired application. Anatase and rutile phases were not detected in the coatings, which would be amorphous or with crystalline fractions undetectable by XRD.
Fil: Kociubczyk, Alex Iván. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Vera, Maria Laura. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Schvezov, Carlos Enrique. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Heredia, Eduardo. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina
Fil: Ares, Alicia Esther. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fuente
International Congress of Science and Technology of Metallurgy and Materials
Materia
Titanium
TiO2
Ti-6Al-4V
Alkaline electrolytes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/9753
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/9753
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation TechniqueKociubczyk, Alex IvánVera, Maria LauraSchvezov, Carlos EnriqueHeredia, EduardoAres, Alicia EstherTitaniumTiO2Ti-6Al-4VAlkaline electrolyteshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2For the construction of a new design of mechanical heart valve a Ti-6Al-4V alloy was selected and coated with TiO2 due to it corrosion resistance and biocompatibility. A required feature on surfaces in contact with blood it is a low level of roughness (Ra ≤ 50 nm) that not favor the formation of blood clots. One technique that can be used to obtain smooth coatings of TiO2 is the electrochemical anodic oxidation technique using pre-spark oxidation voltage. The phenomenon of spark produces porous oxides and roughness higher than desired. The beginning of the spark voltage depends on the electrolyte used. The present work compares the coatings obtained by anodic oxidation of the Ti-6Al-4V alloy applying different voltages (from 10V to 50V), using as electrolyte an aqueous based alkaline solutions of NaOH and KOH, at different concentrations (0.1M, 1M and 2M) and Ca(OH)2 at a concentration of 0.02 M, using a constant current of 50mA to achieve the desired voltage. Morphological analysis of the different oxides is performed using optical microscopy, and roughness measurements using a profilometer. The phases present were analyzed by X-ray diffraction technique with a glancing angle of 1º. By varying the applied voltage coatings of different interference colors were obtained. The morphology and roughness of the obtained oxides varied according to the applied voltage in each experience. With KOH and NaOH 1M the spark occurred at 46V and 41V, respectively. The start voltage of the spark decreased to 34V and 29V, respectively, when the electrolyte concentration increase from 1M to 2M. In pre-spark conditions oxides were of an average roughness of 22 nm. After the spark, the oxides became with roughness of 700 nm, limiting the oxidation conditions for the desired application. Anatase and rutile phases were not detected in the coatings, which would be amorphous or with crystalline fractions undetectable by XRD.Fil: Kociubczyk, Alex Iván. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; ArgentinaFil: Vera, Maria Laura. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; ArgentinaFil: Schvezov, Carlos Enrique. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; ArgentinaFil: Heredia, Eduardo. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; ArgentinaFil: Ares, Alicia Esther. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; ArgentinaElsevier Science2014-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/9753Kociubczyk, Alex Iván; Vera, Maria Laura; Schvezov, Carlos Enrique; Heredia, Eduardo; Ares, Alicia Esther; TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique; Elsevier Science; Procedia Materials Science; 8; 6-2014; 65-722211-8128International Congress of Science and Technology of Metallurgy and Materialsreponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicasenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S2211812815000504info:eu-repo/semantics/altIdentifier/doi/10.1016/j.mspro.2015.04.049info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/2025-09-03T09:54:50Zoai:ri.conicet.gov.ar:11336/9753instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:54:50.981CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
title TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
spellingShingle TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
Kociubczyk, Alex Iván
Titanium
TiO2
Ti-6Al-4V
Alkaline electrolytes
title_short TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
title_full TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
title_fullStr TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
title_full_unstemmed TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
title_sort TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique
dc.creator.none.fl_str_mv Kociubczyk, Alex Iván
Vera, Maria Laura
Schvezov, Carlos Enrique
Heredia, Eduardo
Ares, Alicia Esther
author Kociubczyk, Alex Iván
author_facet Kociubczyk, Alex Iván
Vera, Maria Laura
Schvezov, Carlos Enrique
Heredia, Eduardo
Ares, Alicia Esther
author_role author
author2 Vera, Maria Laura
Schvezov, Carlos Enrique
Heredia, Eduardo
Ares, Alicia Esther
author2_role author
author
author
author
dc.subject.none.fl_str_mv Titanium
TiO2
Ti-6Al-4V
Alkaline electrolytes
topic Titanium
TiO2
Ti-6Al-4V
Alkaline electrolytes
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv For the construction of a new design of mechanical heart valve a Ti-6Al-4V alloy was selected and coated with TiO2 due to it corrosion resistance and biocompatibility. A required feature on surfaces in contact with blood it is a low level of roughness (Ra ≤ 50 nm) that not favor the formation of blood clots. One technique that can be used to obtain smooth coatings of TiO2 is the electrochemical anodic oxidation technique using pre-spark oxidation voltage. The phenomenon of spark produces porous oxides and roughness higher than desired. The beginning of the spark voltage depends on the electrolyte used. The present work compares the coatings obtained by anodic oxidation of the Ti-6Al-4V alloy applying different voltages (from 10V to 50V), using as electrolyte an aqueous based alkaline solutions of NaOH and KOH, at different concentrations (0.1M, 1M and 2M) and Ca(OH)2 at a concentration of 0.02 M, using a constant current of 50mA to achieve the desired voltage. Morphological analysis of the different oxides is performed using optical microscopy, and roughness measurements using a profilometer. The phases present were analyzed by X-ray diffraction technique with a glancing angle of 1º. By varying the applied voltage coatings of different interference colors were obtained. The morphology and roughness of the obtained oxides varied according to the applied voltage in each experience. With KOH and NaOH 1M the spark occurred at 46V and 41V, respectively. The start voltage of the spark decreased to 34V and 29V, respectively, when the electrolyte concentration increase from 1M to 2M. In pre-spark conditions oxides were of an average roughness of 22 nm. After the spark, the oxides became with roughness of 700 nm, limiting the oxidation conditions for the desired application. Anatase and rutile phases were not detected in the coatings, which would be amorphous or with crystalline fractions undetectable by XRD.
Fil: Kociubczyk, Alex Iván. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Vera, Maria Laura. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Schvezov, Carlos Enrique. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
Fil: Heredia, Eduardo. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina
Fil: Ares, Alicia Esther. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Nordeste. Instituto de Materiales de Misiones; Argentina
description For the construction of a new design of mechanical heart valve a Ti-6Al-4V alloy was selected and coated with TiO2 due to it corrosion resistance and biocompatibility. A required feature on surfaces in contact with blood it is a low level of roughness (Ra ≤ 50 nm) that not favor the formation of blood clots. One technique that can be used to obtain smooth coatings of TiO2 is the electrochemical anodic oxidation technique using pre-spark oxidation voltage. The phenomenon of spark produces porous oxides and roughness higher than desired. The beginning of the spark voltage depends on the electrolyte used. The present work compares the coatings obtained by anodic oxidation of the Ti-6Al-4V alloy applying different voltages (from 10V to 50V), using as electrolyte an aqueous based alkaline solutions of NaOH and KOH, at different concentrations (0.1M, 1M and 2M) and Ca(OH)2 at a concentration of 0.02 M, using a constant current of 50mA to achieve the desired voltage. Morphological analysis of the different oxides is performed using optical microscopy, and roughness measurements using a profilometer. The phases present were analyzed by X-ray diffraction technique with a glancing angle of 1º. By varying the applied voltage coatings of different interference colors were obtained. The morphology and roughness of the obtained oxides varied according to the applied voltage in each experience. With KOH and NaOH 1M the spark occurred at 46V and 41V, respectively. The start voltage of the spark decreased to 34V and 29V, respectively, when the electrolyte concentration increase from 1M to 2M. In pre-spark conditions oxides were of an average roughness of 22 nm. After the spark, the oxides became with roughness of 700 nm, limiting the oxidation conditions for the desired application. Anatase and rutile phases were not detected in the coatings, which would be amorphous or with crystalline fractions undetectable by XRD.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/9753
Kociubczyk, Alex Iván; Vera, Maria Laura; Schvezov, Carlos Enrique; Heredia, Eduardo; Ares, Alicia Esther; TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique; Elsevier Science; Procedia Materials Science; 8; 6-2014; 65-72
2211-8128
url http://hdl.handle.net/11336/9753
identifier_str_mv Kociubczyk, Alex Iván; Vera, Maria Laura; Schvezov, Carlos Enrique; Heredia, Eduardo; Ares, Alicia Esther; TiO2 Coatings in Alkaline Electrolytes Using Anodic Oxidation Technique; Elsevier Science; Procedia Materials Science; 8; 6-2014; 65-72
2211-8128
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S2211812815000504
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.mspro.2015.04.049
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv International Congress of Science and Technology of Metallurgy and Materials
reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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