生物医用镁锌合金表面多孔钙磷涂层制备及其特征研究

Research on Preparation and Characteristics of Porous Ca-P Coatings on Biomedical Mg-Zn Alloys Surface

可降解镁合金被誉为革命性的生物医用金属材料,有望用于人体软、硬组织临时性修复或辅助组织再生。为改善生物医用镁锌合金抗腐蚀性能和生物活性,通过微弧氧化技术分别在Mg-3Zn、Mg-5Zn合金和纯镁表面制备出不含Ca与P元素、只含P元素、同时含有Ca与P元素的多孔涂层。利用SEM观察涂层表面微观形貌特征,并通过EDS、XPS分析三种涂层元素组成、元素含量及Ca与P元素特征。结果表明,三种膜层都具有典型的微弧氧化多孔结构,且钙、磷元素成功进入微弧氧化膜层中,但元素含量及状态存在差异。

Degradable magnesium alloy is known as a revolutionary biomaterial,which is expected to be used for temporary repair of human soft and hard tissues or assist tissue regeneration.In order to improve the corrosion resistance and biological activity of biomedical Mg-Zn alloys,the Ca-P-free coating,only P-containing caoting and Ca-P coating were prepared on the surface of Mg-3Zn,Mg-5Zn alloy and pure Mg by micro-arc oxidation.The microstructure of the MAO coating was observed by scanning electron microscope(SEM).The element composition,content of the MAO coating and characteristics of Ca and P were determined by energy disperse spectroscopy(EDS)and X-ray photoelectron spectroscopy(XPS).The results show that the three kinds of coatings have typical micro-arc oxidation porous structure,and calcium and phosphorus elements successfully enter the coating,but the element content and state are significantly different.