Using thermochemical treatment for facilitating apatite formation on Ti-Nb-Sn alloys.

Autor: Rezende, Ana Carolina S. A., Wang, Jiale, Li, Yanwen, Carvalho, Alexandre Magnus Gomes, de Barros Souza, Mauro V., Santos, Sauli, Martins, A., da Silva Costa, Alex Matos, Cremasco, Alessandra, Landers, Richard, Machado, Douglas, Pancotti, Alexandre
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Zdroj: Journal of Materials Science; Apr2020, Vol. 55 Issue 10, p4395-4407, 13p, 3 Diagrams, 1 Chart, 6 Graphs
Abstrakt: Titanium alloys are promising candidates for biomedical applications, and alloys based on the Ti-rich side of Ti-Nb-Sn system have presented material properties deserved for orthopedic implant applications. However, to our knowledge, the structural studies related to surface of these alloys are limited. Ti-18Nb-11Sn and Ti-35Nb-4Sn alloys were synthesized, and the influence of thermochemical treatment on the bioactivity was investigated. The alloys were synthesized by arc melting furnace and then were submitted to thermochemical treatment. X-ray diffraction and scanning electron micrograph analysis showed high crystallinity and maintenance of microstructure of the both alloys before and after thermochemical treatment. The results indicated that the Ti-18Nb-11Sn alloy was not demonstrated to be bioactive, while the Ti-35Nb-4Sn alloy slightly presented bioactivity, which increased after the thermochemical treatment. Meanwhile, the Ti-18Nb-11Sn alloy presented a low hardness value, making it not compatible with biomedical applications. However, the Ti-35Nb-4Sn alloy presented an acceptable hardness value for biomedical applications. We believe that the results reported herein suggest that the Ti-35Nb-4Sn alloy may be attractive for designing biomedical devices with improved performances toward the adhesion of apatite. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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