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首页> 外文期刊>RSC Advances >Fabrication of hydroxyapatite coatings on AZ31 Mg alloy by micro-arc oxidation coupled with sol–gel treatment
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Fabrication of hydroxyapatite coatings on AZ31 Mg alloy by micro-arc oxidation coupled with sol–gel treatment

机译：微弧氧化结合溶胶-凝胶处理在AZ31镁合金上制备羟基磷灰石涂层

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Magnesium (Mg) alloys, can potentially be used as biodegradable orthopedic implants because of their biodegradability and good mechanical properties. However, a quick degradation rate and low bioactivity have prevented their clinical application. In order to enhance the corrosion resistance and the in vitro bioactivity of Mg alloys, protective composite coatings were prepared on AZ31 magnesium alloy followed by sol–gel sealing treatment under low-pressure conditions. The morphologies, crystalline structure and the composition of the samples were characterized by SEM, XRD, and XPS. Electrochemical corrosion test and the in vitro bioactivity were also studied. The results indicated that the composite coatings not only improved the corrosion resistance, but also enhanced the in vitro bioactivity of AZ31 Mg alloy. Therefore, Mg alloy treated with micro-arc oxidation and sol–gel offers a promising approach for biodegradable bone implants.
机译：镁（Mg）合金具有生物降解性和良好的机械性能，因此有可能被用作可生物降解的骨科植入物。然而，快速的降解速率和低的生物活性阻碍了它们的临床应用。为了增强Mg合金的耐腐蚀性和体外生物活性，在AZ31镁合金上制备了保护性复合涂层，然后在低压条件下进行溶胶-凝胶密封处理。用SEM，XRD和XPS对样品的形貌，晶体结构和组成进行了表征。还研究了电化学腐蚀试验和体外生物活性。结果表明，复合涂层不仅提高了AZ31 Mg合金的耐蚀性，而且提高了其体外生物活性。因此，经过微弧氧化和溶胶-凝胶处理的镁合金为可生物降解的骨植入物提供了一种有前途的方法。

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