挤出成形3D打印仿生骨植入钛合金支架制备工艺及性能研究  

Preparation and performance of bionic bone implantation titanium alloy scaffolds by extrusion molding 3D printing

作　　者：刘浩 石永亮 党海青 LIU Hao;SHI Yongliang;DANG Haiqing(epartment of Materials Engineering,Hebei Vocational University of Industry and Technology,Shijiazhuang 050091,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150006,China)

机构地区：[1]河北工业职业技术大学材料工程系,石家庄050091 [2]哈尔滨工业大学材料科学与工程学院,哈尔滨150006

出　　处：《粉末冶金技术》2024年第4期367-373,共7页Powder Metallurgy Technology

基　　金：河北省高等学校科学技术研究项目(QN2023162);河北工业职业技术大学自然科学预研项目(sy202403)。

摘　　要：采用万能试验机和扫描电子显微镜研究了挤出成形3D打印Ti6Al4V钛合金支架的制备工艺、力学性能及微观结构,介绍了采用聚乙烯醇(PVA)水凝胶制备钛合金支架的方法,研究了浆料PVA含量、脱脂温度和烧结温度对制备工艺的影响规律,分析了钛合金支架孔隙率与力学性能的关系。结果表明:采用PVA水凝胶制备钛合金支架可以获得分布均匀且高度互联的多孔结构,当浆料PVA质量分数为15%,脱脂温度和烧结温度分别设定为360℃和1300℃时,制备工艺最佳。孔隙率为59.8%的钛合金支架表现出与人体骨骼相匹配的力学性能,可避免应力遮蔽效应。The preparation,microstructure,and mechanical properties of the Ti6Al4V titanium alloy scaffolds by extrusion molding 3D printing were systematically investigated by universal testing machine and scanning electron microscope in this paper.The preparation of titanium alloy scaffolds using polyvinyl alcohol(PVA)hydrogel was introduced,the influences of slurry PVA content,degreasing temperature,and sintering temperature on the preparation process were investigated,and the relationship between the porosity and mechanical properties of titanium alloy scaffolds was analyzed.The results show that,the PVA hydrogels can be used to prepare the titanium alloy scaffolds to obtain the porous structures with uniform distribution and high interconnectivity.The optimal preparation process is obtained,when the slurry PVA mass fraction is 15%,and the degreasing and sintering temperatures are 360 and1300℃.The titanium alloy scaffolds with the porosity of 59.8%exhibit the excellent mechanical properties matching human bones to avoid the stress-masking effect.

关 键 词：挤出成形 3D打印 PVA水凝胶 钛合金支架 孔隙率 力学性能 

分 类 号：TF124[冶金工程—粉末冶金] TG146.23[冶金工程—冶金物理化学]