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Advances in Materials Science and Engineering
Volume 2015, Article ID 872730, 7 pages
http://dx.doi.org/10.1155/2015/872730
Research Article

Microstructures and Electrochemical Behavior of Ti-Mo Alloys for Biomaterials

1Department of Mechanical Engineering, Chosun University, Gwangju 501-759, Republic of Korea
2Ecotechkorea Co. Ltd., Jeonnam Advanced Ceramics Center, Jeonnam 530-370, Republic of Korea
3Department of Hydrogen & Fuel Cell Technology, Dongshin University, Jeonnam 520-714, Republic of Korea

Received 26 December 2014; Revised 24 February 2015; Accepted 26 February 2015

Academic Editor: Hongchao Kou

Copyright © 2015 Back-Sub Sung et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Ti alloy with 7 wt% Mo revealed a microstructure that contained only the orthorhombic phase of a fine acicular martensitic structure. The corrosion resistance of the Ti-Mo alloys increased as the Mo content increased. Based on the results obtained from the polarization curve and electrochemical impedance, the Ti-Mo alloys were shown to be corrosion resistant because of the passive films formed on their surfaces. No ion release was detected in SBF (simulated body fluid) solution, while Ti ions were released in 0.1% lactic acid ranging from 0.05 to 0.12 μg/mL for the Ti-Mo alloys. In vitro tests showed that MC3T3-E1 cell proliferation on Ti-7 wt% Mo alloy was rather active compared to other Ti-Mo alloys and commercial-grade pure Ti.