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Article

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying

1
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
2
University of Bremen, Badgasteiner Str. 1, 28359 Bremen, Germany
3
Leibniz Institute for Materials Engineering—IWT, Badgasteiner Str. 3, 28359 Bremen, Germany
4
Institute of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russia
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Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Division of Materials Mechanics, 21502 Geesthacht, Germany
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Helmholtz-Zentrum Geesthacht, Institute of Material Research, Division of Metallic Biomaterials, 21502 Geesthacht, Germany
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School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
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Erich Schmid Instiute of Materials Physics, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria
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Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, 8700 Leoben, Austria
*
Author to whom correspondence should be addressed.
Adjunct with National University of Science and Technology «MISiS», LeninskyProsp., 4, 119049 Moscow, Russia.
Nanomaterials 2020, 10(8), 1479; https://doi.org/10.3390/nano10081479
Received: 24 June 2020 / Revised: 16 July 2020 / Accepted: 16 July 2020 / Published: 28 July 2020
Surface functionalization is an effective approach to change the surface properties of a material to achieve a specific goal such as improving the biocompatibility of the material. Here, the surface of the commercial biomedical Ti-6Al-7Nb alloy was functionalized through synthesizing of a porous surface layer by liquid metal dealloying (LMD). During LMD, the Ti-6Al-7Nb alloy is immersed in liquid magnesium (Mg) and both materials react with each other. Particularly, aluminum (Al) is selectively dissolved from the Ti-6Al-7Nb alloy into liquid Mg while titanium (Ti) and niobium (Nb) diffuse along the metal/liquid interface to form a porous structure. We demonstrate that the porous surface layer in the Ti-6Al-7Nb alloy can be successfully tailored by LMD. Furthermore, the concentration of harmful Al in this porous layer is reduced by about 48% (from 5.62 ± 0.11 wt.% to 2.95 ± 0.05 wt.%) after 30 min of dealloying at 1150 K. The properties of the porous layer (e.g., layer thickness) can be tuned by varying the dealloying conditions. In-vitro tests suggest improved bone formation on the functionalized porous surface of the Ti-6Al-7Nb alloy. View Full-Text
Keywords: surface functionalization; porous surface; biomaterial; dealloying; biocompatibility surface functionalization; porous surface; biomaterial; dealloying; biocompatibility
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MDPI and ACS Style

Okulov, I.V.; Joo, S.-H.; Okulov, A.V.; Volegov, A.S.; Luthringer, B.; Willumeit-Römer, R.; Zhang, L.; Mädler, L.; Eckert, J.; Kato, H. Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying. Nanomaterials 2020, 10, 1479. https://doi.org/10.3390/nano10081479

AMA Style

Okulov IV, Joo S-H, Okulov AV, Volegov AS, Luthringer B, Willumeit-Römer R, Zhang L, Mädler L, Eckert J, Kato H. Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying. Nanomaterials. 2020; 10(8):1479. https://doi.org/10.3390/nano10081479

Chicago/Turabian Style

Okulov, Ilya V., Soo-Hyun Joo, Artem V. Okulov, Alexey S. Volegov, Bérengère Luthringer, Regine Willumeit-Römer, Laichang Zhang, Lutz Mädler, Jürgen Eckert, and Hidemi Kato. 2020. "Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying" Nanomaterials 10, no. 8: 1479. https://doi.org/10.3390/nano10081479

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