Influence of Zr addition in β Ti-25Ta-xZr alloys on oxide formation by MAO-treatment

Autor(es)

Kuroda, Pedro A. B. ; dos Santos, Rafael F. M. ; Rossi, Mariana C. ; Correa, Diego R. N. ; Grandini, Carlos R. ; Afonso, Conrado R. M.

• Tipo de documento: Artigo Científico
• Fonte: VACUUM; v. 217, p. 12-pg., 2023-09-01.

Resumo

Titanium and its alloys are widely used in the biomedical field, as they have good mechanical properties for use in orthopedics. However, a surface that promotes bone tissue growth is desired. Although titanium is considered a bioactive element due to its thin layer of passive titanium dioxide, such characteristics can be improved to optimize its surface properties. This study aims to develop the Ti-25Ta-xZr system alloys (x = 0, 25, and 50% by weight) and perform a surface modification, micro-arc oxidation, to increase the bulk protection layer, create a porous layer and incorporate bioactive elements on the surface. The alloys had different phases (alpha", alpha"+beta, and beta), and the surface modification process was able to incorporate calcium, phosphorus, and magnesium. In addition, the X-ray diffraction technique and XPS detected the crystalline phases of the respective alloying elements ox-ides. In this study, adding zirconium increased the amount of the beta phase of "Ti-25Ta" and the surface layer, increased the number of pores, decreased the pore area, and reduced the surface roughness. (AU)

• Processo FAPESP: 21/03865-9 - Influência de modificações superficiais na bioatividade e (tribo)corrosão de ligas beta de Ti-Nb-(Zr) de baixo módulo de elasticidade para aplicação como implantes
• Beneficiário: Mariana Correa Rossi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais
• Beneficiário: Rubens Caram Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/26517-6 - Influência da microestrutura e fases formadas na funcionalização da superfície de ligas beta Ti-25Ta-xZr
• Beneficiário: Pedro Akira Bazaglia Kuroda
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado