摘要
采用浸渍涂敷-烧结法首次在医用三维钛网表面制备出双生物陶瓷涂层,利用X射线衍射、场发射扫描电子显微镜对HA-BG/BG/Ti复合材料进行了微观表征,拉伸法测量了Ti基体与BG涂层的结合强度,模拟人体体液(SBF)评价复合材料的生物相容性.研究表明:该双生物陶瓷涂层的内层为生物玻璃(BG)涂层,外层为多孔结构的羟基磷灰石-生物玻璃(HA-BG)复合涂层.Ti基体被致密的BG涂层包覆,由于在BG/Ti界面发生化学反应,界面的结合强度提高,平均结合强度达27 MPa.生物相容性实验表明,HA-BG/BG/Ti复合材料表面会被一层整齐、致密的HA覆盖,具有良好的生物相容性.
This study presents a method of dip casting with sintering that can deposit double-layered bioceramics coatings onto 3D Ti mesh. X-Ray diffraction and Field Emission Scanning Electron Microscopy were used to characterize the bioceramics coating surface and cross-sectional microstructures. Bonding strength tests were carried out to measure the bonding strength between the BG coating and Ti-substrate. The biocompatibility of the Ti/bioceramics was analyzed by simulated body fluid. The FESEM and XRD characterization results showed that the Ti substrate was fully covered by dense bioglass （BG） coating, and followed by micro-porous hydroxyapatite-bioglass （HA-BG） coating. The average bonding strength between Ti substrate and BG coating was about 27 MPa, which was actually promoted by the chemical reactions at the BG/Ti interface. After SBF immersion for 7 days, the surface of HA-BG/BG/Ti composite was fully covered by an orderly, dense HA deposition layer, which indicated the excellent biocompatibility of the composite.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2013年第6期66-71,共6页
Materials Science and Technology
基金
国家自然科学基金资助项目(50172030)
Australian Research Council's Discovery Project(DP110105296)
关键词
钛
生物玻璃
羟基磷灰石
涂层
界面
生物相容性
titanium
bioglass
hydroxyapatite
coating
interfaces
biocompatibility
