微束等离子喷涂羟基磷灰石涂层的体外生物活性研究  

In vitro bioactivity of hydroxyapatite coatings sprayed by microplasma in simulated body fluid

作　　者：赵秋颖[1] 贺定勇[1] 李晓延[1] 蒋建敏[1] 

机构地区：[1]北京工业大学材料科学与工程学院,100124

出　　处：《焊接》2009年第11期55-58,共4页Welding & Joining

基　　金：北京市教委科技发展计划重点项目(KZ200610005002);2006年度留学人员科技活动择优资助项目;北京工业大学教育教学研究项目(ER2007-B-02)

摘　　要：采用微束等离子喷涂(MPS)方法在Ti6Al4V基体上制备羟基磷灰石(HA)涂层。利用扫描电镜(SEM)和X射线衍射(XRD)分析技术对HA涂层的表面形貌、相组成和结晶度进行表征,并通过模拟体液进行体外生物活性试验。结果表明,微束等离子喷涂制备的HA涂层具有一定粗糙度,存在气孔以及微裂纹。涂层存在热分解现象,涂层中含有HA、α-TCP、β-TCP和非晶相,不含CaO等杂质相。模拟体液试验表明,微束等离子喷涂工艺制备的HA涂层具有较好的生物活性和稳定性。涂层表面均有较大比例的CaP沉积层,且涂层整体保持完整,没有出现明显的剥离。Hydroxyapatite(HA) coatings were deposited on the Ti6Al4V substrate by microplasma spraying(MPS).The morphology,phase compositions,and percentage of crystallinity of the coatings were characterized by means of scanning electron microscopy(SEM) and X-ray diffraction. An in vitro bioactivity evaluation by soaking the coatings in simulated body fluid(SBF) for 14 days was conducted to evaluate its bioactivity. The results suggest that the microplasma sprayed HA coatings exhibit certain roughness,pores,and microcracks.Thermal decomposition exists in the coatings where HA,-TCP,β-TCP,amorphous phases,and CaO-exclusive impurities were observed.The in vitro test indicated that HA coatings deposited by MPS possessed the better bioactivity and stability.A layer of carbonate-apatite covered most of the coating surface, which do not show significant spalling after incubation in SBF.

关 键 词：羟基磷灰石 微束等离子喷涂 涂层 模拟体液 

分 类 号：TG174[金属学及工艺—金属表面处理]