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

Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
University of Bremen, Badgasteiner Str. 1, 28359 Bremen, Germany
Leibniz Institute for Materials Engineering—IWT, Badgasteiner Str. 3, 28359 Bremen, Germany
Institute of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russia
Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Division of Materials Mechanics, 21502 Geesthacht, Germany
Helmholtz-Zentrum Geesthacht, Institute of Material Research, Division of Metallic Biomaterials, 21502 Geesthacht, Germany
School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
Erich Schmid Instiute of Materials Physics, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria
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;
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.

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.

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.

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