摘要
采用凝胶注模工艺制备含8%和12%Co(质量分数,下同)的多孔Ti-Co合金,研究获得均匀悬浮稳定浆料的分散剂加入量。采用扫描电子显微镜、X射线衍射、压缩和三点弯曲试验分别对多孔Ti-Co合金的显微结构和力学性能进行了测试和分析。结果表明,加入1%分散剂可获得分散效果最佳的悬浮浆料,所制备多孔Ti-Co合金的孔隙率在50%左右,孔隙呈三维通孔结构。与多孔纯钛相比,添加Co元素明显提高了多孔Ti的力学性能,其中压缩强度在68～378MPa之间,抗弯曲强度在53.68～169.17MPa之间,弹性模量在7～21GPa之间。固相体积分数为33%,在1100℃下烧结的多孔Ti-8%Co合金由于与成人骨的力学相容性最好,适合作为医用植入材料。
Porous titanium based alloys containing 8 wt% and 12 wt% cobalt elements were prepared by gelcasting methods.The concentration of dispersant for obtain the stable suspension slurry were studied.The microstructure,the total porosity and the mechanical properties of the sintered porous Ti-Co alloys were investigated by scaning electronic microscopy,X-ray diffraction,compression and bending tests.The results show that 1 wt% of the optimal dispersant amount is selected,at which viscosity of the suspension slurry is low.Open and closed three-dimensional pore morphologies and total porosity around 50% can be achieved.In contrast to porous Ti by gelcasting available before,porous Ti-Co alloys present excellent properties.The compressive strength ranging from 68-378 MPa,the bending strength ranging from 53.68-169.17 MPa and Young＇s modulus ranging from 7-21 GPa.In this study,porous Ti-8Co alloy（33 vol%） which have great properties matching adult bone,therefore being suited for medical applications.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第10期1822-1826,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50774010)
国家教育部回国人员科研启动基金项目
