| 仿生涂层形貌对MgZnSrCa合金降解速率的影响 |
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| 引用本文： | 张雅静,时贵安,郭廷廷,陆前.仿生涂层形貌对MgZnSrCa合金降解速率的影响[J].材料导报,2016,30(Z2):361-364. |
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| 作者姓名： | 张雅静 时贵安 郭廷廷 陆前 |
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| 作者单位： | 东北大学材料科学与工程学院, 沈阳 110819,东北大学材料科学与工程学院, 沈阳 110819,东北大学材料科学与工程学院, 沈阳 110819,东北大学材料科学与工程学院, 沈阳 110819 |
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| 基金项目： | 辽宁省科学技术基金(201403798);沈阳市科学技术基金(F14-231-1-03;F15-139-9-42) |
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| 摘 要： | 镁合金降解速率过快限制了其作为生物医用材料的应用,对镁合金降解速率的控制成为了研究的热点。采用仿生法在MgZnSrCa合金基体表面形成羟基磷灰石涂层。利用X射线衍射仪、扫描电子显微镜及能谱仪对涂层结构、形貌和成分进行分析和观察。通过失重法、析氢法、pH值测定等方法,研究不同涂层形貌的合金试样在人体模拟体液(SBF)中的降解速率。实验结果表明:羟基磷灰石(HA)涂层可以降低合金的降解速率,可以通过控制涂层形貌对合金的降解速率进行控制。
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| 关 键 词： | MgZnSrCa合金 人体模拟体液 羟基磷灰石 降解速率 仿生涂层法 |
Research on the Relationship of the Morphology of Biomimetic Coating and the Degradation Rate of MgZnSrCa Alloy |
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| ZHANG Yajing,SHI Guian,GUO Tingting and LU Qian.Research on the Relationship of the Morphology of Biomimetic Coating and the Degradation Rate of MgZnSrCa Alloy[J].Materials Review,2016,30(Z2):361-364. |
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| Authors: | ZHANG Yajing SHI Guian GUO Tingting and LU Qian |
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| Affiliation: | School of Materials Science and Engineering, Northeastern University, Shengyang 110819,School of Materials Science and Engineering, Northeastern University, Shengyang 110819,School of Materials Science and Engineering, Northeastern University, Shengyang 110819 and School of Materials Science and Engineering, Northeastern University, Shengyang 110819 |
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| Abstract: | The rapid degradation rate limits the use of magnesium alloy as biological and medical materials. Controlling the degradation rates of magnesium alloys has become a hot research topic in recent years. The hydroxya-patite (HA) coatings on the surface of MgZnSrCa alloy were deposited by a biomimetic coating method. The HA coa-tings were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). In simulated body fluid, the corrosion rates of MgZnSrCa alloy with different coating morphologies were studied by means of the weight loss, hydrogen evolution and change of pH value. The results indicated that the degradation rates of the alloy with hydroxyapatite coatings were slower than that of the alloy without coating, in the simulated body fluid (SBF). The feasibility of controlling the degradation rate of magnesium alloy by changing the morphology of hydroxyapatite coating was confirmed. |
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| Keywords: | MgZnSrCa alloy simulated body fluid hydroxyapatite degradation rate biomimetic coating |
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