亚音速火焰喷涂HA/BG仿生生物涂层  

HA/BG Bionic Biocoatings Prepared by Subsonic Flame Spraying

作　　者：庄明辉[1] 李慕勤[1] 尹柯[1] 

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《中国表面工程》2013年第1期69-73,共5页China Surface Engineering

基　　金：黑龙江省自然科学基金(E0304);黑龙江省教育厅项目(11531365)

摘　　要：为提高HA涂层结合强度,避免涂层在使用过程中开裂及溶解脱落等问题,采用亚音速火焰喷涂方法及涂层晶化处理,以Ti6Al4V为基体,引入热膨胀系数与基体相近的Ti/G过渡层缓解应力,工作层以HA为主,辅以生物活性玻璃(BG),喷涂制备HA/BG仿生生物涂层。通过调整BG含量,观测涂层形貌、相组成及结构的变化,进而分析HA/BG仿生生物涂层作为骨组织替代材料的适用性。结果表明:亚音速火焰喷涂HA/BG仿生生物涂层具有典型的热喷涂涂层形貌特征,与基体结合较好,没有明显的开裂脱落现象,涂层经700℃晶化处理后析出纳米和微米级HA,可增加与宿主骨组织接触面积,加快其反应,增加生物活性。添加BG后,涂层中有新相Na2Ca(PO4)F析出;当改变BG含量后,可改变HA、Na2Ca(PO4)F晶相的含量,进而来调控涂层的溶解性和稳定性。To improve the bonding strength of HA coatings and avoid the fracture, dissolution and peeling of the coatings, HA/BG bionic biocoatings were sprayed on Ti6A14V substrate by subsonic flame spraying and crystallization treatment. Ti/G coating with thermal expansion coefficient similar to that of the substrate was selected as the transition layer to relieve the stress, and HA as the working layer assistant with bioglass（BG）. The applicability of HA/BG bionic coatings as bone tissue substitute was investigated by adjusting the BG content and observing the change of morphology, composition and microstructure of the coatings. Results show that the HA/BG bionic coatings by subsonic flame spraying, with typical morphology of thermal spraying, have good adhesion to the substrate without obvious stripping. After the crystallization treatment at 700 ~C, the precipitation of nanoscale to microscale HA in the coatings increases its contact area with host bone tissue and accelerates the reactive rate, resulting in the increase of the bioactivity. New Na2 Ca（PO4 ）F phase occurs after the addition of different BG. Moreover, the content of Na^Ca（PO4 ）F is controlled by adjusting the content of BG, which can further modify the dissolution and stability of the coatings.

关 键 词：羟基磷灰石 亚音速火焰喷涂 仿生生物涂层 

分 类 号：TG174.442[金属学及工艺—金属表面处理]