东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (12): 1715-1718.DOI: 10.12068/j.issn.1005-3026.2014.12.010

• 材料与冶金 • 上一篇    下一篇

仿生涂层控制Mg-Zn-Sr合金的降解速率

张雅静， 吴琴， 左丽静， 尹文亚   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-11-27 修回日期:2013-11-27 出版日期:2014-12-15 发布日期:2014-09-12
  • 通讯作者: 张雅静
  • 作者简介:张雅静(1964-)，女，辽宁沈阳人，东北大学副教授.
  • 基金资助:
    辽宁省科学技术基金资助项目(201403798)； 沈阳市科学技术基金资助项目(F14-231-1-03)

Controlling the Biodegradation Rate of Mg-Zn-Sr Alloy Using Biomimetic Coating

ZHANG Ya-jing， WU Qin， ZUO Li-jing， YIN Wen-ya   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-11-27 Revised:2013-11-27 Online:2014-12-15 Published:2014-09-12
  • Contact: ZHANG Ya-jing
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摘要： 镁合金作为生物医用材料面临最大的问题是降解速率过快，不能与骨愈合的速率配合.通过仿生法在Mg-Zn-Sr合金表面形成涂层，利用X射线衍射和扫描电子显微镜对涂层结构和形貌进行分析与观察;采用电化学和浸泡腐蚀实验，研究涂层对Mg-Zn-Sr合金在人体模拟液中降解速率的影响.实验结果表明:仿生法在合金表面形成的涂层为羟基磷灰石涂层;羟基磷灰石涂层提高了Mg-Zn-Sr合金在人体模拟溶液中的耐腐蚀性能.

关键词: Mg-Zn-Sr合金, 仿生涂层法, 人体模拟液, 降解速率, 腐蚀

Abstract: Magnesium alloy has attracted the attention of the biomaterials community as a potential biodegradable metallic candidate for stents and orthopedic applications. The high corrosion rate of magnesium alloy confines their application in clinical. Therefore， it′s one of the main approaches to develop Mg-based biomaterials with good corrosion resistance and high strength for biomedical engineering. The apatite coatings were deposited on matrix through biomimetic method. The coating was characterized by XRD and SEM. The degradation rates of the samples without and with hydroxyaptite coating were researched in the simulated body fluid(SBF). The results showed that surface modification improves the corrosion resistance. The degradation rate of the Mg-Zn-Sr alloy with coating was slower than that of the alloy without coating on the surface.

Key words: Mg-Zn-Sr alloy, biomimetic coating technique, simulated body fluid, degradation rate, corrosion

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