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Corrosion and tribocorrosion behaviour of beta-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications

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Resumo:Corrosion and tribocorrosion behaviour of modified Ti surfaces through thermochemical treatments has been studied. Electrochemical Impedance Spectroscopy (EIS) and reciprocating sliding tests using a ball-on-plate tribometer under 1 N load and alumina as counter-material were used to evaluate the influence of Nb and Mo on titanium corrosion and tribocorrosion properties.Ti-Nb and Ti-Mo surfaces exhibited better anticorrosive properties than CP-titanium. Under tribological action the modified Ti surfaces showed similar coefficient of friction and lower tendency to corrosion compared to CP-Ti. Furthermore, Nb diffusion increased the repassivation rate with respect to Ti and Ti-Mo surfaces due to its stable passive film.
Autores principais:Urena, J.
Outros Autores:Tsipas, S.; Pinto, A. M. P.; Toptan, Fatih; Gordo, E.; Jimenez-Morales, A.
Assunto:beta-Gradient titanium Powder technology Nb and Mo surface treatments Corrosion Tribocorrosion β-Gradient titanium
Ano:2018
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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