医用多孔钛植入材料凝胶注模成形工艺研究  

ON GELCASTING OF MEDICAL POROUS TITANIUM IMPLANTS

作　　者：李艳[1] 郭志猛[1] 郝俊杰[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《粉末冶金工业》2008年第1期10-13,共4页Powder Metallurgy Industry

摘　　要：采用凝胶注模成形工艺制备了大尺寸、复杂形状医用多孔钛植入材料,其孔隙度为46.5%、开孔隙度为40.7%,抗压强度为158.6MPa、杨氏模量为8.5GPa,与自然骨基本匹配,适合作为人造骨替代材料。研究了预混液中有机单体的浓度、单体(AM)/交联剂(MBAM)比例以及固相含量对钛粉浆料表观黏度以及坯体强度的影响,并得到了最佳工艺参数;讨论了不同烧结工艺时烧结体的孔隙度以及力学性能的变化,发现在1373K保温1.5h是凝胶注模成形多孔钛植入材料较为合适的烧结工艺参数。Big and complex-shaped porous titanium implants prepared by gelcasting,with porosity of 46. 5% ,open porosity of 40.7% ,compressive strength of 158. 6MPa,Young＇s modulus of 8. 5GPa,similar to human cortical bone,are appropriate for implanting. The effects of monomer concentration in premix solution, AM/MBAM ratio and solid content on apparent viscosity of titanium slurry and green strength were researched and optimum process parameters were studied. Additionally,the change of porosity and mechanical properties of the implants sintered under various sintering conditions is discussed,and the sintering parameters. 1373K for 1.5h are considered as optimum for Gelcast medical porous titanium implants.

关 键 词：多孔钛 凝胶注模成形 植入材料 

分 类 号：TF124.39[冶金工程—粉末冶金] R318.08[冶金工程—冶金物理化学]