Liu Linlin, Xu Jiang, Munroe Paul, Xu Jiake, Xie Zong-Han
Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People's Republic of China.
Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People's Republic of China.
Acta Biomater. 2014 Feb;10(2):1005-13. doi: 10.1016/j.actbio.2013.09.021. Epub 2013 Sep 27.
In this paper, (Ti1-xNbx)5Si3 nanocrystalline films were synthesized and their potential as highly corrosion-resistant coatings for the biomedical alloy Ti-6Al-4V was explored. To assess the electrochemical behavior of the as-deposited films, the samples were immersed in Ringer's solution open to air at 37°C. The processes that govern the electrochemical reactions at the film surface were analyzed using a combination of complementary electrochemical measurement techniques such as potentiodynamic polarization, electrochemical impedance spectroscopy and Mott-Schottky analysis. The results show that the (Ti1-xNbx)5Si3 nanocrystalline films offer Ti-6Al-4V a strong shield from corrosive attack and the addition of Nb in the films greatly enhances their resistance to corrosion, and in so doing, minimizes metal ion release. Collectively, our data suggest that (Ti1-xNbx)5Si3 nanocrystalline films as supreme coatings with anti-corrosive properties have potential to improve the performance and extend the service life of orthopedic and cochlear implants.
在本文中，合成了(Ti1-xNbx)5Si3纳米晶薄膜，并探索了其作为生物医学合金Ti-6Al-4V的高耐腐蚀涂层的潜力。为了评估沉积态薄膜的电化学行为，将样品浸入37°C的空气中的林格氏溶液中。使用诸如动电位极化、电化学阻抗谱和莫特-肖特基分析等互补电化学测量技术的组合，分析了薄膜表面控制电化学反应的过程。结果表明，(Ti1-xNbx)5Si3纳米晶薄膜为Ti-6Al-4V提供了强大的抗腐蚀保护，并且薄膜中添加Nb大大增强了它们的抗腐蚀能力，从而使金属离子释放最小化。总体而言，我们的数据表明，(Ti1-xNbx)5Si3纳米晶薄膜作为具有抗腐蚀性能的优质涂层，有潜力改善骨科和耳蜗植入物的性能并延长其使用寿命。
