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首页> 外文期刊>Applied Surface Science >Coating of biodegradable magnesium alloy bone implants using nanostructured diopside (CaMgSi_2O_6)
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Coating of biodegradable magnesium alloy bone implants using nanostructured diopside (CaMgSi_2O_6)

机译：使用纳米结构透辉石（CaMgSi_2O_6）涂覆可生物降解的镁合金骨植入物

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摘要

Magnesium alloys with their biodegradable characteristic can be a very good candidate to be used in orthopedic implants. However, magnesium alloys may corrode and degrade too fast for applications in the bone healing procedure. In order to enhance the corrosion resistance and the in vitro bioactivity of a magnesium alloy, a nanostructured diopside (CaMgSi_2O_6) film was coated on AZ91 magnesium alloy through combined micro-arc oxidation (MAO) and electrophoretic deposition (EPD) methods. The crystalline structures, morphologies and compositions of the coated and uncoated substrates were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy. Polarization, electrochemical impedance spectroscopy, and immersion test in simulated body fluid (SBF) were employed to evaluate the corrosion resistance and the in vitro bioactivity of the samples. The results of our investigation showed that the nanostructured diopside coating deposited on the MAO layer increases the corrosion resistance and improves the in vitro bioactivity of the biodegradable magnesium alloy.
机译：具有可生物降解特性的镁合金非常适合用于整形外科植入物中。但是，镁合金可能会腐蚀和降解得太快，以至于无法应用于骨骼愈合过程。为了增强镁合金的耐腐蚀性和体外生物活性，通过微弧氧化（MAO）和电泳沉积（EPD）的方法，在AZ91镁合金上涂覆了纳米级透辉石（CaMgSi_2O_6）膜。使用X射线衍射（XRD），扫描电子显微镜（SEM）和能量色散光谱对涂覆和未涂覆的基材的晶体结构，形态和组成进行了表征。通过极化，电化学阻抗谱和在模拟体液（SBF）中的浸没测试来评估样品的耐腐蚀性和体外生物活性。我们的研究结果表明，沉积在MAO层上的纳米级透辉石涂层可提高耐蚀性并改善可生物降解镁合金的体外生物活性。

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  • 来源
    《Applied Surface Science》 |2014年第1期|130-137|共8页
  • 作者

    Mehdi Razavi; Mohammadhossein Fathi; Omid Savabi; Batoul Hashemi Beni; Seyed Mohammad Razavi; Daryoosh Vashaee; Lobat Tayebi;

  • 作者单位

    Biomaterials Research Croup, Department of Materials Engineering, Isfahan University of Technology, Isfahan'84156-83111, Iran,Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran,Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran,School of Materials Science and Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, OK 74106, USA,School of Electrical and Computer Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, OK 74106, USA;

    Biomaterials Research Croup, Department of Materials Engineering, Isfahan University of Technology, Isfahan'84156-83111, Iran,Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran;

    Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran;

    Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran;

    School of Dentistry, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran;

    School of Materials Science and Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, OK 74106, USA;

    School of Materials Science and Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, OK 74106, USA,School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA;

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  • 正文语种 eng
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  • 关键词

    Biodegradable magnesium alloy; Coating; Corrosion resistance; In vitro bioactivity; Biomedical applications;

    机译：可生物降解的镁合金;涂层;耐腐蚀性能;体外生物活性;生物医学应用;

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