【作者】 刘其斌； 邹龙江； 朱维东； 李海涛； 董闯；

【Author】 LIU Qi-bin, ZHOU Long-Jiang, ZHU Wei-dong, LI Hai-tao, DONG Chuang ( Dalian University of Technology, Dalian 116024, China; Guizhou University, Guiyang 550003, China)

【机构】 大连理工大学三束材料改性国家重点实验室； 贵州大学；

【摘要】 采用宽带激光熔覆技术,在钛合金表面制备了梯度生物陶瓷涂层,从理论上研究了宽带激光条件下 CaHPO4·2H2O-CaCO3混合粉末制备梯度生物陶瓷涂层的动力学,提出了相应的数学模型及其数值求解方法。验证实验表明,选用适合的宽带激光工艺参数,可以获得含HA的生物陶瓷复合涂层。采用现代分析测试手段,对激光熔覆生物陶瓷涂层的形貌、组织进行了分析,结果表明,生物陶瓷涂层由β—TCP、CaO、CaTiO3、HA及TiO2等复相构成。生物陶瓷涂层表面为类珊瑚状或短杆堆积状结构,这种组织结构有利于骨细胞的长入,改善陶瓷的生物相容性。更多还原

【Abstract】 The gradient bioceramic coating was prepared on the surface of titanium alloy by using wide-band laser cladding. The dynamics of gradient bioceramic composite coating containing hydroxyapatite (HA) prepared with mixture of CaHPO4 · 2H2O and CaCO3 under the condition of wide-band laser was studied theoretically. The corresponding mathematical model and its numerical solution were presented. The examination experiment shows that HA bioceramic composite coatings can be obtained by appropriately choosing wide-band laser cladding parameters. The microstructure and surface morphology of HA bioceramic coating were observed by SEM and X-ray diffraction. The experimental results show that the bioceramic coating is composed of HA, β-TCP, CaO, CaTiO3 and TiO2. The surface of bioceramic coating takes coral-shaped structure or short-rod piled structure, which helps osteoblast grow into bioceramic and improves the biocompatibility.更多还原