磁控溅射法制备HAF/YSZ梯度复合涂层及生物性能研究

采用射频磁控溅射技术在Ti6Al4V基体上成功制备了含氟羟基磷灰石梯度复合涂层(HAF/YSZ)。利用X射线光电子能谱(XPS)、电子探针(EDX)、扫描电镜(SEM)等对涂层的成分分布、形貌、界面结合进行表征。通过模拟体液(SBF)实验,分析和评价了HAF/YSZ涂层在模拟人体条件下的生物性能。结果表明,所制备涂层表面粗糙,呈多孔岛状结构,有利于新生骨组织的生长;涂层与基体结合紧密,各层间相互扩散,整体一致性较好;经模拟体液浸泡后,涂层表面有新生物质沉积,表现出较好的生物活性及稳定性;梯度复合涂层较氟含量单一的氟羟基磷灰石涂层具有更好的抗体液溶解能力及稳定性。

Preparation and Bioactivities of the HAF/YSZ Gradient Composite Coatings by Frequency Magnetron Sputtering

The hydroxyfluorapatite gradient composite coatings(HAF/YSZ) on Ti6Al4V substrate were depo-sited by radio frequency magnetron sputtering.XPS,EDX,and SEM were used to investigate the composition distribution,surface morphology and interface morphology of the coatings.The biological activity and stability of HAF/YSZ coatings were analysed in siulated body fluid(SBF).Results show that the gradient coating shows a porous structure and a rough surface,which provides the growth conditions for fresh osseous tissue.The interface combination between HAF/YSZ coating and substrate is close.Interdiffusion exists between layers,and the overall consistency is better.New substance is made on the surface of HAF/YSZ coatings,which shows that HAF/YSZ coatings have better biological activity and stability after been immersed in SBF.The anti-solubility and stability of HAF/YSZ coatings are better than that of single fluorine content coatings.