Effect of negative voltage on the microstructure, degradability and in vitro bioactivity of microarc oxidized coatings on ZK60 magnesium alloy
Effect of negative voltage on the microstructure, degradability and in vitro bioactivity of microarc oxidized coatings on ZK60 magnesium alloy
复制标题
DOI：
10.1016/j.matlet.2013.12.103
复制
发表时间：
2014-03
影响因子：
3
通讯作者：
Yichuan Pan;D. Wang;Chuanzhong Chen
中科院分区：
文献类型：
--
作者：
Yichuan Pan;D. Wang;Chuanzhong Chen
采用微弧氧化技术在ZK 60镁合金表面制备陶瓷膜。通过模拟体液浸泡试验评价了涂层的降解性能和生物活性。采用扫描电子显微镜（SEM）和X射线衍射仪（XRD）对涂层的形貌和相组成进行了表征。利用电化学工作站研究了样品的电化学腐蚀性能。结果表明，负电压的引入和增加可以通过影响离子迁移的方向和速度来影响涂层的生长机制。在0-100 V范围内，随着负电压的增加，涂层的电化学腐蚀性能提高，涂层降解速率降低，涂层耐蚀性与磷灰石形成能力的综合性能增强。
Ceramic coatings were fabricated on ZK60 magnesium alloy by microarc oxidation (MAO) with different negative voltages. The coating degradability and bioactivity were evaluated by simulated body fluid (SBF) soaking test. A scanning electron microscope (SEM) and an X-ray diffractometer (XRD) were employed to characterize the coating morphology and phase composition. The electrochemical workstation was used to investigate the electrochemical corrosion properties of the samples. The results show that the coating growth mechanism can be influenced by the introduction and increase of negative voltage through affecting the direction and speed of ions transferring. With increase of negative voltage in the range of 0–100 V, the coating electrochemical corrosion property is improved, the coating degradation rate is reduced, and the combination property of coating corrosion resistance and apatites forming ability is enhanced.