Corrosion and tribocorrosion behavior of Ti-Alumina composites

Detalhes bibliográficos
Autor(a) principal: Gordo, Elena
Data de Publicação: 2016
Outros Autores: Das Neves, Roberto G., Ferrari, Begoña, Jimenez-Morales, Antonia, Lima, Andreia, Alves, Alexandra Manuela Vieira Cruz Pinto, Pinto, A. M. P., Toptan, Fatih
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/51362
Resumo: This work focus on the corrosion and wear properties of titanium reinforced with 1% wt. alumina particles, produced by a combination of colloidal techniques and powder metallurgy. The alumina particles were added to control the grain growth of titanium during sintering, and simultaneously to increase hardness and wear resistance. Colloidal techniques permitted a homogeneous dispersion of alumina particles on the surface of fine Ti particles by the formulation of stable aqueous suspensions that were further processed by spray-dry to obtain spherical granules with improved compressibility. Ti-Alumina samples were produced by uniaxial pressing of granules and vacuum sintering leading to materials with homogeneous microstructure, a reduction of grain size higher than 50 % with respect to pure titanium, and a sensible increase in hardness. But the addition of ceramic particles can also have an influence on the corrosion behavior that is one of the most interesting properties of titanium alloys, and on wear resistance, that is one of the drawbacks of Ti. Moreover, the study of simultaneous action of wear and corrosion (tribocorrosion) is an area of highest interest in applications like biomedical or automotive. The corrosion behavior was evaluated by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PP) in NaCl at two concentrations (0.9 % and 3.5 %) and temperatures (37 °C, and room temperature). Tribocorrosion tests were performed using a reciprocating ball-on-plate tribometer where a 10 mm diameter alumina ball was used as counter material, and 10 N normal load was applied during 30 min in the same concentrations and temperatures of NaCl as in the static corrosion test s. The results showed a clear improvement of wear resistance on the composite without reducing the corrosion behavior in both conditions.
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spelling Corrosion and tribocorrosion behavior of Ti-Alumina compositesAluminaBiomaterialsColloidal ProcessingCorrosionTitaniumTribocorrosionThis work focus on the corrosion and wear properties of titanium reinforced with 1% wt. alumina particles, produced by a combination of colloidal techniques and powder metallurgy. The alumina particles were added to control the grain growth of titanium during sintering, and simultaneously to increase hardness and wear resistance. Colloidal techniques permitted a homogeneous dispersion of alumina particles on the surface of fine Ti particles by the formulation of stable aqueous suspensions that were further processed by spray-dry to obtain spherical granules with improved compressibility. Ti-Alumina samples were produced by uniaxial pressing of granules and vacuum sintering leading to materials with homogeneous microstructure, a reduction of grain size higher than 50 % with respect to pure titanium, and a sensible increase in hardness. But the addition of ceramic particles can also have an influence on the corrosion behavior that is one of the most interesting properties of titanium alloys, and on wear resistance, that is one of the drawbacks of Ti. Moreover, the study of simultaneous action of wear and corrosion (tribocorrosion) is an area of highest interest in applications like biomedical or automotive. The corrosion behavior was evaluated by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PP) in NaCl at two concentrations (0.9 % and 3.5 %) and temperatures (37 °C, and room temperature). Tribocorrosion tests were performed using a reciprocating ball-on-plate tribometer where a 10 mm diameter alumina ball was used as counter material, and 10 N normal load was applied during 30 min in the same concentrations and temperatures of NaCl as in the static corrosion test s. The results showed a clear improvement of wear resistance on the composite without reducing the corrosion behavior in both conditions.(undefined)info:eu-repo/semantics/publishedVersionTrans Tech PublicationsUniversidade do MinhoGordo, ElenaDas Neves, Roberto G.Ferrari, BegoñaJimenez-Morales, AntoniaLima, AndreiaAlves, Alexandra Manuela Vieira Cruz PintoPinto, A. M. P.Toptan, Fatih20162016-01-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/51362eng97830383553971013-982610.4028/www.scientific.net/KEM.704.28info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-11T07:07:09Zoai:repositorium.sdum.uminho.pt:1822/51362Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T07:07:09Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Corrosion and tribocorrosion behavior of Ti-Alumina composites
title Corrosion and tribocorrosion behavior of Ti-Alumina composites
spellingShingle Corrosion and tribocorrosion behavior of Ti-Alumina composites
Gordo, Elena
Alumina
Biomaterials
Colloidal Processing
Corrosion
Titanium
Tribocorrosion
title_short Corrosion and tribocorrosion behavior of Ti-Alumina composites
title_full Corrosion and tribocorrosion behavior of Ti-Alumina composites
title_fullStr Corrosion and tribocorrosion behavior of Ti-Alumina composites
title_full_unstemmed Corrosion and tribocorrosion behavior of Ti-Alumina composites
title_sort Corrosion and tribocorrosion behavior of Ti-Alumina composites
author Gordo, Elena
author_facet Gordo, Elena
Das Neves, Roberto G.
Ferrari, Begoña
Jimenez-Morales, Antonia
Lima, Andreia
Alves, Alexandra Manuela Vieira Cruz Pinto
Pinto, A. M. P.
Toptan, Fatih
author_role author
author2 Das Neves, Roberto G.
Ferrari, Begoña
Jimenez-Morales, Antonia
Lima, Andreia
Alves, Alexandra Manuela Vieira Cruz Pinto
Pinto, A. M. P.
Toptan, Fatih
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Gordo, Elena
Das Neves, Roberto G.
Ferrari, Begoña
Jimenez-Morales, Antonia
Lima, Andreia
Alves, Alexandra Manuela Vieira Cruz Pinto
Pinto, A. M. P.
Toptan, Fatih
dc.subject.por.fl_str_mv Alumina
Biomaterials
Colloidal Processing
Corrosion
Titanium
Tribocorrosion
topic Alumina
Biomaterials
Colloidal Processing
Corrosion
Titanium
Tribocorrosion
description This work focus on the corrosion and wear properties of titanium reinforced with 1% wt. alumina particles, produced by a combination of colloidal techniques and powder metallurgy. The alumina particles were added to control the grain growth of titanium during sintering, and simultaneously to increase hardness and wear resistance. Colloidal techniques permitted a homogeneous dispersion of alumina particles on the surface of fine Ti particles by the formulation of stable aqueous suspensions that were further processed by spray-dry to obtain spherical granules with improved compressibility. Ti-Alumina samples were produced by uniaxial pressing of granules and vacuum sintering leading to materials with homogeneous microstructure, a reduction of grain size higher than 50 % with respect to pure titanium, and a sensible increase in hardness. But the addition of ceramic particles can also have an influence on the corrosion behavior that is one of the most interesting properties of titanium alloys, and on wear resistance, that is one of the drawbacks of Ti. Moreover, the study of simultaneous action of wear and corrosion (tribocorrosion) is an area of highest interest in applications like biomedical or automotive. The corrosion behavior was evaluated by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PP) in NaCl at two concentrations (0.9 % and 3.5 %) and temperatures (37 °C, and room temperature). Tribocorrosion tests were performed using a reciprocating ball-on-plate tribometer where a 10 mm diameter alumina ball was used as counter material, and 10 N normal load was applied during 30 min in the same concentrations and temperatures of NaCl as in the static corrosion test s. The results showed a clear improvement of wear resistance on the composite without reducing the corrosion behavior in both conditions.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
dc.type.driver.fl_str_mv conference paper
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/51362
url http://hdl.handle.net/1822/51362
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 9783038355397
1013-9826
10.4028/www.scientific.net/KEM.704.28
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Trans Tech Publications
publisher.none.fl_str_mv Trans Tech Publications
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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