Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000501053 |
Resumo: | AbstractSeveral studies regarding superficial treatments of Nitinol (NiTi) shape-memory have been developed aiming to the improve corrosion resistance and to block the Ni release to adjacent tissues. The necessary heat treatment to achieve the shape memory effect normally occurs at temperatures between 500 and 600 °C. However, titanium oxide (TiO2) is formed on the NiTi surface during the shape memory process heat treatment. In this work the effects of the heat treatment time on the surface characteristics of the formed NiTi oxide, at temperatures that promote the shape-memory (530 and 570 °C), were evaluated. The TiO2 layers which were obtained were evaluated by X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscope (SEM), thermogravimetric analysis (TGA), wettability and roughness. The results show that by increasing the exposure time at the temperature of 570 °C the formation of a thicker oxide is promoted, with less superficial roughness and of a hydrophobic nature. According to the literature, these characteristics indicate that the obtained oxide layer has properties that accelerat the osseointegration process. |
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Materials research (São Carlos. Online) |
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Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape MemorybiomaterialNiTishape-memoryheat treatmentoxideAbstractSeveral studies regarding superficial treatments of Nitinol (NiTi) shape-memory have been developed aiming to the improve corrosion resistance and to block the Ni release to adjacent tissues. The necessary heat treatment to achieve the shape memory effect normally occurs at temperatures between 500 and 600 °C. However, titanium oxide (TiO2) is formed on the NiTi surface during the shape memory process heat treatment. In this work the effects of the heat treatment time on the surface characteristics of the formed NiTi oxide, at temperatures that promote the shape-memory (530 and 570 °C), were evaluated. The TiO2 layers which were obtained were evaluated by X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscope (SEM), thermogravimetric analysis (TGA), wettability and roughness. The results show that by increasing the exposure time at the temperature of 570 °C the formation of a thicker oxide is promoted, with less superficial roughness and of a hydrophobic nature. According to the literature, these characteristics indicate that the obtained oxide layer has properties that accelerat the osseointegration process.ABM, ABC, ABPol2015-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000501053Materials Research v.18 n.5 2015reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1516-1439.022415info:eu-repo/semantics/openAccessHansen,Alana WittBeltrami,Lilian Vanessa RossaAntonini,Leonardo MarascaVillarinho,Denis JardimNeves,Julio Cesar Klein dasMarino,Cláudia Eliana BrunoMalfatti,Célia de Fragaeng2015-10-19T00:00:00Zoai:scielo:S1516-14392015000501053Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2015-10-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
title |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
spellingShingle |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory Hansen,Alana Witt biomaterial NiTi shape-memory heat treatment oxide |
title_short |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
title_full |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
title_fullStr |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
title_full_unstemmed |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
title_sort |
Oxide Formation on NiTi Surface: Influence of the Heat Treatment Time to Achieve the Shape Memory |
author |
Hansen,Alana Witt |
author_facet |
Hansen,Alana Witt Beltrami,Lilian Vanessa Rossa Antonini,Leonardo Marasca Villarinho,Denis Jardim Neves,Julio Cesar Klein das Marino,Cláudia Eliana Bruno Malfatti,Célia de Fraga |
author_role |
author |
author2 |
Beltrami,Lilian Vanessa Rossa Antonini,Leonardo Marasca Villarinho,Denis Jardim Neves,Julio Cesar Klein das Marino,Cláudia Eliana Bruno Malfatti,Célia de Fraga |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Hansen,Alana Witt Beltrami,Lilian Vanessa Rossa Antonini,Leonardo Marasca Villarinho,Denis Jardim Neves,Julio Cesar Klein das Marino,Cláudia Eliana Bruno Malfatti,Célia de Fraga |
dc.subject.por.fl_str_mv |
biomaterial NiTi shape-memory heat treatment oxide |
topic |
biomaterial NiTi shape-memory heat treatment oxide |
description |
AbstractSeveral studies regarding superficial treatments of Nitinol (NiTi) shape-memory have been developed aiming to the improve corrosion resistance and to block the Ni release to adjacent tissues. The necessary heat treatment to achieve the shape memory effect normally occurs at temperatures between 500 and 600 °C. However, titanium oxide (TiO2) is formed on the NiTi surface during the shape memory process heat treatment. In this work the effects of the heat treatment time on the surface characteristics of the formed NiTi oxide, at temperatures that promote the shape-memory (530 and 570 °C), were evaluated. The TiO2 layers which were obtained were evaluated by X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscope (SEM), thermogravimetric analysis (TGA), wettability and roughness. The results show that by increasing the exposure time at the temperature of 570 °C the formation of a thicker oxide is promoted, with less superficial roughness and of a hydrophobic nature. According to the literature, these characteristics indicate that the obtained oxide layer has properties that accelerat the osseointegration process. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000501053 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000501053 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1516-1439.022415 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.18 n.5 2015 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212665835651072 |