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Title: Ti–Ta dental alloys and a way to improve gingival aesthethic in contact with the implant
Authors: Hulka, Iosif 
Florido Suárez, Néstor Rubén 
Mirza Rosca, Julia Claudia 
Saceleanu, Adriana
UNESCO Clasification: 3314 Tecnología médica
331402 Prótesis
321313 Ortodoncia-estomatología
331401 Órganos artificiales
330307 Tecnología de la corrosión
Keywords: Ti-Ta
Dental alloys
Oxide growth
Issue Date: 2022
Project: Microscopio Electronico Multifuncional 
Journal: Materials Chemistry and Physics 
Abstract: The development of Ti-based alloys with improved properties for medical applications is a challenge nowadays in the field of materials engineering. In this study, the color of oxide layers developed by anodic oxidation in H2SO4 solution on Ti–Ta alloys was studied and the alteration in microhardness was evaluated. The alloys were manufactured by levitation fusion technique using Ti as base material and Ta was added in 5, 15, 25, and 30 wt%. After the alloys were passivated, changes of oxide color function of applied potential, the growth of oxide mass and the microhardness were investigated. The studies showed that the oxide mass increases with the potential and the hardness values vary as a function of Ta addition. The microhardness results showed that the oxide layer developed after passivation on the surface of Ti–25Ta alloy exhibited higher hardness values and a denser oxide layer as compared to the Ti–5Ta, Ti–15Ta, and Ti–30Ta alloys. Using a potential of 70 V a redish oxide color was obtained which might have optimal aplications in dentistry due to its aesthetics and mechanical properties.
ISSN: 0254-0584
DOI: 10.1016/j.matchemphys.2022.126343
Source: Materials Chemistry and Physics [ISSN 0254-0584], v. 287, 126343, (Agosto 2022)
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