摘要
多孔金属钽是一种具有良好亲生物性和骨长入特性的新型骨科植入材料,采用传统制备工艺获得的产物,具有物相不纯、孔隙率较低以及制备成本高的弊端.采用多方位分段式出气化学气相沉积(MDSO-CVD)技术,以三维网络连通结构的多孔碳为基底,制备了一种新颖的三维高孔隙率金属钽材料,并深入研究了沉积温度和沉积时间对三维金属钽结构演变的影响,揭示了沿气体流场方向金属钽的沉积规律.分别利用X射线衍射仪、扫描电子显微镜和透射电子显微镜对金属钽的物相和微观结构进行分析;采用失重法测量金属钽的孔隙率.研究结果表明:当沉积温度为1 000℃和沉积时间为12 h时,获得纯相金属钽材料的孔隙率高于80%,该材料可作为一种压缩性能优异的骨科植入材料.因此,本文开发的高效、规模化制备三维高孔隙率金属钽的MDSO-CVD方法,可为金属钽应用于医学领域提供重要的制备技术支撑.
Porous metallic tantalum is a new type of orthopedic implant material with the characteristics of good biocompatibility and bone ingrowth.The product obtained by the traditional preparation process has the disadvantages of impurity,low porosity and high cost.In this work,a novel three-dimensional(3D)metallic tantalum with high porosity was prepared controllably by a multi-directional segmented outgassing chemical vapor deposition(MDSO-CVD)technique with 3D network connected structure porous carbon as the substrate.The effects of deposition temperature and deposition time on the structure evolution of 3D tantalum material were investigated,and the deposition law of tantalum along the direction of gas flow field was revealed.The phase and microstructure of metallic tantalum were analyzed by XRD,SEM and TEM,respectively.The porosity of tantalum was measured by weight loss method.When the deposition temperature was 1000℃and the deposition time was 12 h,the as-prepared pure metallic tantalum showed the high porosity of more than 80%,which can serve as an orthopedic implant material with good compression property.Therefore,the efficient,large-scale and controllable MDSO-CVD method of 3D high-porosity tantalum material developed in this work provides important technical support for the application of metallic tantalum in the medical field.
作者
谷立民
孙宇辰
井蕊璇
代丽娜
马传佳
李渭
GU Li-min;SUN Yu-chen;JING Rui-xuan;DAI Li-na;MA Chuan-jia;LI Wei(Xi′an Chaoma Technology Co.,Ltd.,Xi′an 710025,China;Academy of Aerospace Solid Propulsion Technology,Xi′an 710025,China)
出处
《陕西科技大学学报》
北大核心
2023年第4期119-125,共7页
Journal of Shaanxi University of Science & Technology
基金
西安超码科技有限公司科研项目(2021)。
关键词
金属钽
三维结构
高孔隙率
可控制备
压缩性能
metallic tantalum
three-dimensional structure
high porosity
controllable preparation
compressive property
