尿素作为造孔剂制备泡沫钛的结构和力学性能  

Microstructure and Mechanical Properties of Titanium Foams Prepared with Carbamide as Space Holder

作　　者：肖健[1] 邱贵宝[1] 廖益龙[1] 白晨光[1] 

机构地区：[1]重庆大学,重庆400044

出　　处：《稀有金属材料与工程》2015年第7期1724-1729,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51174243)

摘　　要：采用针状尿素作为造孔剂,在造孔剂含量介于60%～80%的情况下进行了泡沫钛的制备。通过造孔剂技术成功地制备出孔隙率介于50.2%～71.4%的泡沫钛。扫描电镜结果表明,孔的连通程度随着造孔剂含量的增加而增加,当造孔剂含量超过70%时形成开孔泡沫钛。力学性能测试结果表明,力学性能随着孔隙率的增加而减小,试样的屈服强度、抗压强度和杨氏模量分别介于34.4～146.8 MPa、40.6～193.2 MPa和0.5～3.3 GPa。孔隙率为50.2%和71.4%的泡沫钛的杨氏模量分别匹配于皮质骨和松质骨的模量,理论上可作为潜在的骨替代材料。Production of Ti foams using acicular carbamide as space holder in the case of spacer content between 60%～80% has been investigated.Ti foams having porosities in the range of 50.2%～71.4% have been manufactured.The SEM microstructure shows that the connectivity degree of macrospores grows with higher spacer content, and Ti foams with open-cell structure are formed when the spacer content is beyond 70%.The compressive tests indicate that the mechanical properties of Ti foams decrease with increasing porosity.The resultant yield strength, compressive strength and Young＇s modulus vary in the range of 34.4～146.8 MPa, 40.6～193.2 MPa and 0.5～3.3 GPa, respectively.Ti foams with porosity 50.2% and 71.4% may theoretically serve as potential substituted materials for cortical and cancellous bone, respectively.

关 键 词：泡沫钛 造孔剂技术 微观结构 力学性能 生物材料 

分 类 号：R318.08[医药卫生—生物医学工程] O614.411[医药卫生—基础医学]