Microstructure, corrosion behavior and cytotoxicity of Zr–Nb alloys for biomedical application | Zendy

F.Y. Zhou | Zendy; Bo Wang | Zendy; K.J. Qiu | Zendy; Wenjiao Lin | Zendy; Li Li | Zendy; Y.B. Wang | Zendy; Fei Nie | Zendy; Yufeng Zheng | Zendy

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Microstructure, corrosion behavior and cytotoxicity of Zr–Nb alloys for biomedical application

Author(s) -

F.Y. Zhou,

Bo Wang,

K.J. Qiu,

Wenjiao Lin,

Li Li,

Y.B. Wang,

Fei Nie,

Yufeng Zheng

Publication year - 2012

Publication title -

materials science and engineering c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.234

H-Index - 130

eISSN - 1873-0191

pISSN - 0928-4931

DOI - 10.1016/j.msec.2012.02.002

Subject(s) - materials science , microstructure , corrosion , alloy , dielectric spectroscopy , metallurgy , biocompatibility , x ray photoelectron spectroscopy , pitting corrosion , polarization (electrochemistry) , oxide , electrochemistry , chemical engineering , electrode , chemistry , engineering

In this work, the effects of Nb content on microstructure and corrosion behaviors of biomedical Zr-Nb alloys were systematically studied. The results of XRD analysis and optical microscopy indicated that the experimental Zr-Nb alloys had a duplex structure of α and β phases, and the content of β phase increased with the increase of Nb content. The electrochemical impedance spectroscopy (EIS) studies showed an improvement on the resistance of the spontaneous oxide film with increasing Nb content. The EIS data, fitted by R s(Q pR p) model, suggested a single passive film formed on the experimental material surfaces. Polarization tests in Hank's solution revealed a nobler electrochemical behavior of the Zr-Nb alloys after alloying Nb to pure Zr. The corrosion resistance increased with increasing Nb content, as indicated by lower corrosion current densities and passive current densities and higher pitting potentials. The major components on the surfaces of the corroded Zr-Nb alloy samples detected by XPS were ZrO 2 and Nb 2O 5. The biocompatibility of Zr-Nb alloys was primarily evaluated by culturing L-929 cells in the extraction media of Zr-Nb alloy samples and excellent results were obtained. All of these above results suggested that the Zr-22Nb alloy, among the experimental alloys, showed a promising potential for biomedical applications. © 2012 Elsevier B.V. All rights reserved.

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