微束等离子喷涂氧化锆涂层的生物活性研究  

Bioactivity of Micro-plasma Sprayed Zirconia Coating

作　　者：栗卓新[1] 吴永智[1] 贺定勇[1] 赵秋颖[1] 

机构地区：[1]北京工业大学,材料科学与工程学院,北京100124

出　　处：《北京工业大学学报》2009年第5期669-673,共5页Journal of Beijing University of Technology

基　　金：北京市教委科技发展计划重点资助项目(KZ200610005002);北京市属市管高等学校人才强教计划资助项目.

摘　　要：采用微束等离子喷涂(MPS)技术,在Ti-6Al-4V基体上制备了氧化钇稳定化氧化锆(YSZ)涂层,并通过观察涂层在模拟体液(SBF)中浸泡后表面磷灰石的生长情况以评估其生物活性.利用光学显微镜、SEM和XRD对浸泡前后涂层形貌、相组成进行了研究.结果表明:使用MPS方法可以制备ZrO_2涂层;XRD分析显示涂层中ZrO_2主要以四方相存在;SEM观察发现涂层表面较粗糙且存在孔隙;涂层截面的片层结构比较紧密;在SBF中浸泡4周后,涂层表面局部有磷灰石薄膜形成,说明涂层具有一定的生物活性.Yttria stabilized zirconia(YSZ) coatings were deposited onto Ti-6Al-4V substrate through a microplasma spraying(MPS) technique and incubated in the simulated body fluid(SBF) for different periods of time.The apatite formation on their surface was investigated to evaluate the bioactivity of the coatings. Surface morphologies and structural changes in the coatings before and after immersion were analyzed by optical microscope(OM),scanning electron microscopy(SEM) and X-ray diffractometer(XRD).Results show that yttria stabilized zirconia coatings can be produced by MPS.XRD patterns show that the coatings appear to be primitive tetragonal phase.SEM observations show that the ZrO_2 coating appear to be rough, porous and melted.The cross-section morphology of the coatings was very dense.Apatite layer formed on the surface of coatings after 4 weeks immersion in SBF solution,indicating that the YSZ coating possesses definite bioactivity.

关 键 词：氧化锆 微束等离子喷涂 涂层 生物活性 磷灰石 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TB321[金属学及工艺—金属学]