不同含量HAp对Zn-Mg/HAp复合材料组织与腐蚀行为的影响  

Effects of Different Content of HAp on Microstructure and Corrosion Behavior of Zn-Mg/HAp Composites

作　　者：李伟健 崔泽琴[1,2] 马丽莉 李国凯[1,2] 宫殿清 LI Weijian;CUI Zeqin;MA Lili;LI Guokai;GONG Dianqing(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Advanced Magnesium-based Materials,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]先进镁基材料山西省重点实验室,山西太原030024

出　　处：《热加工工艺》2022年第2期82-86,共5页Hot Working Technology

基　　金：国家自然科学基金项目(51305292);山西省自然科学基金项目(201701D221081)。

摘　　要：采用Zn粉、Mg粉和纳米级羟基磷灰石(hydroxyapatite,HAp)为原料,通过高能球磨和放电等离子烧结技术(spark plasma sintering,SPS)成功制备出Zn-15Mg/xHAp(x=0,5,10wt%)复合材料。研究了不同HAp含量对复合材料致密度、组织结构以及体外降解行为影响。结果表明:通过SPS制备的复合材料致密度都均达到90%以上。体外静态浸泡实验结果表明:复合材料在Hank’s溶液中的降解速率随HAp含量的增加呈上升趋势,其中,Zn-15Mg/5HAp性能最优,在浸泡10d后腐蚀速率稳定在1.8 mm/a。同时发现,增加HAp含量会改善材料降解过程中表面钙磷层的沉积效果,使得钙磷层均匀连续。Zn powder, Mg powder and nanometer hydroxyapatite(hydroxyapatite, HAp) were used as raw materials.Zn-15Mg/xHAp(x =0, 5, 10wt%) composites were successfully prepared by high energy ball milling and spark plasma sintering(spark plasma sintering, SPS). The effects of different HAp content on the density, microstructure and degradation behavior of the composites in vitro were studied. The results show that, the density of composites prepared by SPS is more than 90%. The results of static immersion test in vitro show that, the degradation rate of composites in Hank’s solution increases with the increase of HAp content. Among them, the performance of Zn-15Mg/5HAp is the best, and the corrosion rate is stabilized at 1.8 mm/a after 10 days of immersion. At the same time, it is found that increasing the content of HAp can improve the deposition effect of calcium and phosphorus layer on the surface of the material during the degradation process,and make the calcium and phosphorus layer uniform and continuous.

关 键 词：ZN合金 羟基磷灰石 放电等离子烧结 显微组织 腐蚀行为 

分 类 号：TB333.12[一般工业技术—材料科学与工程]