| 电沉积制备镁合金HA涂层的组织及其可降解性能 |
| |
| 引用本文： | 崔彤,管仁国.电沉积制备镁合金HA涂层的组织及其可降解性能[J].材料热处理学报,2011,32(9). |
| |
| 作者姓名： | 崔彤 管仁国 |
| |
| 作者单位： | 东北大学材料与冶金学院,辽宁沈阳,110006 |
| |
| 基金项目： | 国家自然科学基金研究项目(51074049);国家自然科学基金研究重点项目(51034002) |
| |
| 摘 要： | 采用碱热处理＋电沉积＋碱热处理相结合的工艺,在Mg-4.0Zn-1.0Ca-0.6Zr合金板材表面制备羟基磷灰石（HA）涂层。利用X射线衍射和SEM对涂层的组织和形貌进行了分析,对合金板材及HA涂层板材在SBF溶液中的可降解性能进行了研究,结果表明：通过前碱热处理＋电沉积＋后碱热处理的方法在电沉积温度50℃,电压10 V条件下,在Mg-4.0Zn-1.0Ca-0.6Zr合金板材表面制备出了平整、致密的HA涂层,其Ca/P的比值（1.72）与人骨的（1.67）相近;HA涂层Mg-4.0Zn-1.0Ca-0.6Zr合金板材在SBF溶液腐蚀过程中,发现3 d时腐蚀液穿过HA涂层开始浸蚀基体。随着腐蚀时间的延长,部分点蚀的直径扩大,构成局部腐蚀;HA涂层Mg-4.0Zn-1.0Ca-0.6Zr合金板材在SBF溶液中的初始腐蚀速率低于未涂层的合金板材,其在SBF溶液中的初始pH值的变化低于未涂层的,随降解时间延长,pH变化幅度开始增大,10 d后pH值平均值约为9.2,随后逐步趋于稳定;HA涂层Mg-4.0Zn-1.0Ca-0.6Zr合金板材在SBF溶液中的初始自腐蚀电位与未涂层的相比正移200 mV以上,亦说明了其在SBF溶液中的初始腐蚀速率低于未涂层的,但是随着涂层的脱落将促使腐蚀速率增大。
|
| 关 键 词： | 电沉积 HA涂层 生物材料 降解 |
Microstructure and degradation performance of hydroxyapatite coatings on a magnesium alloy prepared by electro-deposition |
| |
| CUI Tong,GUAN Ren-guo.Microstructure and degradation performance of hydroxyapatite coatings on a magnesium alloy prepared by electro-deposition[J].Transactions of Materials and Heat Treatment,2011,32(9). |
| |
| Authors: | CUI Tong GUAN Ren-guo |
| |
| Affiliation: | CUI Tong,GUAN Ren-guo(College of Materials and Metallurgy,Northeastern University,Shenyang 110006,China) |
| |
| Abstract: | Hydroxyapatite(HA) coatings on the surface of Mg-4.0Zn-1.0Ca-0.6Zr alloy sheet were prepared by a process of pre-treatment in hot alkali solution,electro-deposition and post-treatment in hot alkali solution.The microstructure and morphology of the coatings were observed and analyzed by means of X-ray diffraction and scanning electron microscopy,as well as its degradation behavior in SBF was examined.The results indicate that the dense HA coating on the magnesium alloy with the ratio of Ca and P of 1.72,whic... |
| |
| Keywords: | electro-deposition treatment HA coatings biological materials degradation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
