Corrosion behavior of ZrN/Zr coated biomedical AZ91 magnesium alloy
Corrosion behavior of ZrN/Zr coated biomedical AZ91 magnesium alloy
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DOI：
10.1016/j.surfcoat.2009.02.074
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发表时间：
2009-06-15
影响因子：
5.4
通讯作者：
Chu, Paul K.
中科院分区：
文献类型：
--
作者：
Xin, Yunchang;Liu, Chenglong;Chu, Paul K.
镁合金是一种很有潜力的生物可降解硬组织植入材料。然而，它们在生理环境中的快速降解速率构成了它们应用的主要限制。采用过滤式阴极电弧沉积系统在AZ 91镁合金表面制备了ZrN/Zr双层涂层。ZrN/Zr双层结构缓冲了基底和ZrN涂层之间的严重失配，从而提高了膜的附着力。通过X射线衍射（XRD）和X射线光电子能谱（XPS）对涂层的组成进行了评价。采用动电位极化曲线和电化学阻抗谱（EIS）研究了涂层的电化学行为。我们的研究结果表明，涂层合金的耐腐蚀性显着提高。(C)2009年由Elsevier B. V.出版
Magnesium alloys are potential materials in biodegradable hard tissue implants. However, their fast degradation rates in a physiological environment constitute the main limitation for their applications. In this work, a ZrN/Zr bilayered coating is deposited on AZ91 magnesium alloy using a filtered cathodic arc deposition system. The ZrN/Zr bilayered structure buffers the serious mismatch between the substrate and ZrN coating thus improving film adhesion. The composition of the coating is evaluated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrochemical behavior of the coated alloy is systematically studied by means of potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS). Our results disclose that the corrosion resistance of the coated alloy is significantly improved. (C) 2009 Published by Elsevier B.V.