Corrosion resistance and in vitro bioactivity of Si-containing coating prepared on a biodegradable Mg-Zn-Ca bulk metallic glass by micro-arc oxidation
Corrosion resistance and in vitro bioactivity of Si-containing coating prepared on a biodegradable Mg-Zn-Ca bulk metallic glass by micro-arc oxidation
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DOI：
10.1016/j.jnoncrysol.2016.11.011
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发表时间：
2017-01-15
影响因子：
3.5
通讯作者：
Zeng, Xierong
中科院分区：
文献类型：
--
作者：
Chen, Shuangshuang;Tu, Jianxin;Zeng, Xierong
研制成功了临界铸造尺寸为5 mm的镁锌钙大块非晶合金。采用微弧氧化(MAO)技术在BMG表面制备了多孔、粗糙的含硅涂层。通过在模拟体液(SBF)中的浸泡试验，分析了涂层的降解性和生物活性。结果表明，经MAO处理后，BMG试件的耐蚀性显著提高。多孔层上自发生成的碳酸化羟基磷灰石(HA)表明，由于其物相组成和多孔表面结构，所制备的MAO涂层具有较高的生物活性。本工作为制备具有良好耐蚀性和高生物活性的镁基金属氧化物涂层的表面修饰提供了一条很有前途的途径。(C)2016年，由爱思唯尔出版。
A Mg-Zn-Ca bulk metallic glass (BMG) with a critical casting size of 5 mm was successfully developed. A porous and rough silicon-containing coating was achieved on the BMG by micro-arc oxidation (MAO) technique. The degradability and bioactivity of the coatings were analyzed by immersion tests in the stimulated body fluid (SBF). The results indicated that the corrosion resistance of the BMG specimens was significantly improved-after MAO treatment. The spontaneous formation of carbonated hydroxyapatite (HA) on the porous layer demonstrated that the prepared MAO coating has a high bioactivity as a result of its phase composition and porous surface structure. The present work may provide a promising way for surface modification of Mg-based BMGs through fabrication of MAO coatings with good corrosion resistance and high bioactivity. (C) 2016 Published by Elsevier B.V.