应用激光, 2012, 32 (4): 323, 网络出版: 2012-09-24  

Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层生物相容性的影响

The Effect of Different Nd2O3 Contents on Biocompatibility of Rare Earths Active Bioceramic Gradient Coating Produced by Wide-Band Laser Cladding
作者单位
贵州交通职业技术学院, 贵州 贵阳 550008
摘要
针对目前生物活性陶瓷涂层存在的问题, 设计了一种梯度涂层, 采用宽带激光熔覆技术, 通过加入不同含量的稀土氧化物 Nd2O3来提高激光熔覆生物陶瓷涂层的生物相容性, 在 Ti-6Al-4V合金表面制备了含 HA+茁-TCP的稀土活性梯度陶瓷涂层。利用 SEM、XRD对活性涂层组织结构进行了研究。采用体外人成骨细胞与材料共培养的方法, 对梯度活性陶瓷涂层进行了细胞形态实验。结果表明: Nd2O3含量的不同, 对涂层催化效果不一样, 使得复合涂层呈现形态各异的表面特征, 但涂层表面都具有一定的粗糙度, 将增加生物陶瓷涂层与骨组织的生物相容性; 稀土氧化物 Nd2O3在激光熔覆生物陶瓷过程中具有催化合成 HA+茁-TCP的作用, 当 w(Nd2O3)=0.6豫时, 诱导合成 HA+茁-TCP的数量最多; 含稀土氧化物 Nd2O3的涂层对成骨细胞无毒副作用, 当 w(Nd2O3)=0.6豫时染色呈正常梭形状态的细胞数目最多, 具有最佳的生物相容性。
Abstract
In this paper, as to problem on bioceramic coating at present, a kind of gradient bioceramic coating is designed, the rareearths active gradient bioceramic coating with HA and茁-TCP on TC4 titanium alloy was prepared by using wide-band laser claddingtechnique. the microstructure of gradient bioceramic coating was studied with the help of XRD、SEM. The method was to culture osteoblast on gradient bioceramic coating in vitro. Nd2O3 plays an important role in inducing to synthesize HA and茁-TCP during laser cladding . When the content of Nd2O3 reaches to 0.6wt.%, the amount of synthesizing HA and茁-TCP is the most; At the same time, Nd2O3 plays an important role to Coating morpholgies; the coating containing Nd2O3 has no toxic effect.

王永福, 王毅, 汪震. Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层生物相容性的影响[J]. 应用激光, 2012, 32(4): 323. Wang Yongfu, Wang Yi, Wang Zhen. The Effect of Different Nd2O3 Contents on Biocompatibility of Rare Earths Active Bioceramic Gradient Coating Produced by Wide-Band Laser Cladding[J]. APPLIED LASER, 2012, 32(4): 323.

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