Microstructural, mechanical and electrochemical characterization of Ti-35Nb-xY alloys for biomedical applications
As-cast TiNb alloys with different Y additions were studied, which promoted the formation of Y2O3. Its particles were responsible for grain refinement, the smallest reduction of which was 82% for the TiNb0.6Y alloy, that had the highest volume fraction and the highest E. The hardness of the alloys,...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2025-08-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392025000200293&tlng=en |
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| Summary: | As-cast TiNb alloys with different Y additions were studied, which promoted the formation of Y2O3. Its particles were responsible for grain refinement, the smallest reduction of which was 82% for the TiNb0.6Y alloy, that had the highest volume fraction and the highest E. The hardness of the alloys, on the other hand, was reduced by the depletion of O in the matrix, leading to a loss of solid solution strengthening. Anodic polarization showed that the TiNb0.1Y alloy had higher icrit and lower Eb values, whose lower resistance was confirmed by chronoamperometry. EIS showed that the TiNb0.2Y alloy had the largest capacitive arc diameter and one of the largest phase angles, pointing to the greater resistivity and stability of the passive layer, while Mott-Schottky analysis revealed n-type semiconductor properties in the passive films, whose film formed on the TiNb0.2Y alloy showed the lowest donor density, confirming its greater corrosion resistance. |
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| ISSN: | 1516-1439 |