3D打印-凝胶注模制备蜂窝状Ti-6Al-4V多孔钛骨骼的研究  

3D printing and gelcasting process of Ti-6Al-4V porous titanium bone

作　　者：石永亮[1] 郭志猛 李秀敏[1] 戚翠芬[1] 杨晓彩[1] SHI Yong-liang;GUO Zhi-meng;LI Xiu-min;QI Cui-fen;YANG Xiao-cai(Department of Materials Engineering, Hebei College of Industry and Technology, Shijiazhuang 050091, China;Institute for Advanced Materials ＆ Technology, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]河北工业职业技术学院材料工程系,河北石家庄050091 [2]北京科技大学新材料技术研究院,北京100083

出　　处：《粉末冶金工业》2018年第3期34-39,共6页Powder Metallurgy Industry

基　　金：河北省科技计划项目(16211028);河北省高等学校科学技术研究青年基金项目(QN2018221)

摘　　要：研究了一种通过3D扫描、3D打印并翻模制备多孔钛人体骨骼模型的方法：以Ti-6Al-4V粉末为原料,聚乙烯醇为造孔剂,通过水基凝胶注模-真空烧结制备出与原件尺寸偏差为±0.5 mm的多孔钛骨骼模型。研究了干燥、烧结过程的物相、收缩率、强度、孔隙率及孔隙结构变化。结果表明：整个凝胶注模干燥与真空烧结过程中多孔钛坯体收缩均匀一致,径向收缩率为16.11%,轴向收缩率为16.04%。经1 200℃烧结、保温2 h,多孔钛获得最佳性能,其组织呈现出均匀的蜂窝结构,孔径大小为100-350μm,微孔尺寸小于10μm,孔隙率为70.56%,开孔率为65.60%,抗压强度为194 MPa,抗弯强度为105 MPa,结构与性能都能够满足制作人体骨骼的使用要求。The method for preparing porous titanium human bone model by 3D scanning,3D printing and turning mode was studied. The porous titanium bone model with an original size deviation of 0.5 mm was prepared by water-based gelcasting and vacuum sintering using Ti-6Al-4V powder as raw material and polyvinyl alcohol as pore former. Phase composition,shrinkage ratio,strength,porosity and pore structure change in the process of drying and sintering were investigated. The results show that,the body shrinkage is uniform in the gelcasting and vacuum sintering process,the radial shrinkage rate and axial shrinkage rate is 16.11% and 16.04%,respectively.The optimum performance is obtained at 1 200 ℃ for 2 hours. Under these conditions,the porous Ti has uniform honeycomb structure,pore size of 100-350 μm,micropore size of less than 10 μm,total porosity of 70.56%,open porosity of 65.60%,compressive strength of 194 MPa,and bending strength of 105 MPa. The structure and performance can both meet the requirement of making human skeleton.

关 键 词：3D打印 多孔钛 凝胶注模 收缩率 造孔剂 

分 类 号：R318.08[医药卫生—生物医学工程] TF125.6[医药卫生—基础医学]