Nanostructured β-phase Ti–31.0Fe–9.0Sn and sub-μm structured Ti–39.3Nb–13.3Zr–10.7Ta alloys for biomedical applications: Microstructure benefits on the mechanical and corrosion performances
| Autor: | Annett Gebert, Maria Dolors Baró, Santiago Suriñach, Eva Pellicer, Nele Van Steenberge, Mariana Calin, Jordi Sort, Jürgen Eckert, Sergio González, Anna Hynowska, Jordina Fornell |
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| Rok vydání: | 2012 |
| Předmět: |
010302 applied physics
Materials science Simulated body fluid Metallurgy Alloy Modulus Bioengineering 02 engineering and technology engineering.material Nanoindentation 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Casting Corrosion Biomaterials Metal Mechanics of Materials visual_art 0103 physical sciences engineering visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: C. 32:2418-2425 |
| ISSN: | 0928-4931 |
| Popis: | Nanostructured Ti–31.0Fe–9.0Sn and sub-micrometer structured Ti–39.3Nb–13.3Zr–10.7Ta (wt.%) β-type alloys, exhibiting different microstructures and dissimilar mechanical properties, have been prepared by copper mold casting. The microstructure, mechanical behavior and corrosion resistance, in simulated body fluid, of both alloys have been investigated and compared to those of commercial Ti–6Al–4V. Nanoindentation experiments reveal that the Ti–31.0Fe–9.0Sn rods exhibit very large hardness (H ≈ 9 GPa) and high Young's modulus. Conversely, the Ti–39.3Nb–13.3Zr–10.7Ta alloy is mechanically softer but it is interesting for biomedical application because of its rather low Young's modulus (E ≈ 71 GPa). Concerning the corrosion performance, Ti–35Nb–7Zr–5Ta shows a corrosion behavior comparable to Ti–Al6–V4, with no potential breakdown up to 0.4 V vs. Ag|AgCl. On the contrary, the Ti–31.0Fe–9.0Sn alloy exhibits a more anodic corrosion potential, but the value is still less negative than for pure elemental Fe and Ti. From all these properties and because of the absence of toxic elements in the compositions, the Ti–39.3Nb–13.3Zr–10.7Ta and Ti–31.0Fe–9.0Sn alloys are attractive for use as metallic biomaterials. |
| Databáze: | OpenAIRE |
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