| AZ31镁合金表面含纳米羟基磷灰石微弧氧化涂层的制备及性能研究 |
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| 引用本文： | 杨蕾,梁军,许益蒙,孙兢,林永盛,曹宝成.AZ31镁合金表面含纳米羟基磷灰石微弧氧化涂层的制备及性能研究[J].表面技术,2018,47(4):153-159. |
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| 作者姓名： | 杨蕾 梁军 许益蒙 孙兢 林永盛 曹宝成 |
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| 作者单位： | 兰州大学 口腔医学院,兰州,730000;中科院兰州分院,兰州,730000;西北民族大学 口腔医学国家民委重点实验室,兰州,730030 |
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| 基金项目： | 甘肃省自然基金(1208RJZA236)，甘肃省科技厅科技支撑项目(1604FKCA089;1504FKCA095)，中央高校基本科研基金(lzujbky-2017-it48) |
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| 摘 要： | 目的改善AZ31镁合金的耐腐蚀性能及生物活性。方法使用微弧氧化技术,分别在以六偏磷酸钠为主盐的电解液和以六偏磷酸钠为主盐、以纳米羟基磷灰石(HA)为添加剂的电解液中,在AZ31镁合金表面制备了微弧氧化涂层。通过扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)表征了涂层的微观形貌、元素特征和相组成。通过电化学方法和浸泡实验考察了涂层的耐蚀性。通过细胞实验评价了两种涂层的细胞相容性。结果电解液中的HA可以进入到微弧氧化涂层中,含HA的微弧氧化涂层较不含HA的更致密,且有封孔现象。电化学方法及浸泡实验结果表明,含HA的微弧氧化涂层的耐腐蚀性能更好。细胞表面粘附实验和细胞增殖实验也表明,经表面纳米HA微弧氧化处理后的AZ31镁合金生物相容性更好,且对MC3T3-E1细胞的增殖有促进作用。结论六偏磷酸钠电解液中添加纳米HA,可以在AZ31镁合金表面制备出含HA的微弧氧化涂层,且其耐腐蚀性能和生物活性均优于不含HA的微弧氧化膜。
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| 关 键 词： | 镁合金 羟基磷灰石 微弧氧化 耐腐蚀性能 生物活性 |
| 收稿时间： | 2017/11/12 0:00:00 |
| 修稿时间： | 2018/4/20 0:00:00 |
Preparation and Properties of Micro-arc Oxidation Coating Containing Nano-hydroxyapatite on AZ31 Magnesium Alloy |
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| YANG Lei,LIANG Jun,XU Yi-meng,SUN Jing,LIN Yong-sheng and CAO Bao-cheng.Preparation and Properties of Micro-arc Oxidation Coating Containing Nano-hydroxyapatite on AZ31 Magnesium Alloy[J].Surface Technology,2018,47(4):153-159. |
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| Authors: | YANG Lei LIANG Jun XU Yi-meng SUN Jing LIN Yong-sheng and CAO Bao-cheng |
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| Affiliation: | School of Stomatology, Lanzhou University, Lanzhou 730000, China,Lanzhou Branch of Chinese Academy of Sciences, Lanzhou 730000, China,School of Stomatology, Lanzhou University, Lanzhou 730000, China,School of Stomatology, Lanzhou University, Lanzhou 730000, China,Key Laboratory Stomatology of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou 730030, China and School of Stomatology, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | The work aims to improve corrosion resistance and bioactivity of AZ31 magnesium alloy. Micro-arc oxidation films were prepared on the surface of AZ31 magnesium alloy in one piece of electrolyte taking sodium hexametaphosphate as main salt, and the other taking sodium hexametaphosphate as main salt and nano-hydroxyapatite (HA) as additive. Microstructure, element characteristics and phase composition of the coatings were characterized with scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). Corrosion resistance of the coatings was investigated in electrochemical method and by performing immersion experiment. Cell compatibility of the two coatings was evaluated by cell experiment. HA in the electrolyte could enter into the micro-arc oxidation film. Compared with the HA-free micro-arc oxidation film, the micro-arc oxidation film containing HA was more compact and was subject to hole sealing. Electrochemical method and soak test showed that HA-MAO exhibited better corrosion resistance. Cell surface adhesion experiment and cell proliferation experiment showed that AZ31 magnesium alloy receiving HA micro-arc oxidation not only had better biocompatibility, but also promoted proliferation of MC3T3-E1 cells. Addition of nano-HA in the sodium hexametaphosphate solution can produce HA-containing micro-arc oxidation coating on the surface of AZ31 magnesium alloy, and its corrosion resistance and bioactivity are superior to those of HA-free micro-arc oxidation coating. |
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| Keywords: | magnesium alloy hydroxyapatite micro-arc oxidation corrosion resistance bioactivity |
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