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

Nanomaterials

Jürgen Eckert¹  Bérengère Luthringer²  Regine Willumeit-Römer²  ArtemVladimirovich Okulov³  Soo-Hyun Joo⁴  IlyaVladimirovich Okulov⁴  Hidemi Kato⁴  AlexeySergeevich Volegov⁵  Laichang Zhang⁶  Lutz Mädler⁷ 

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

关键词: surface functionalization;    porous surface;    biomaterial;    dealloying;    biocompatibility;   

DOI  :  10.3390/nano10081479

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown