Zou Chunming, Zhang Erlin, Li Mingwei, Zeng Songyan
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China.
J Mater Sci Mater Med. 2008 Jan;19(1):401-5. doi: 10.1007/s10856-006-0103-0. Epub 2007 Jul 3.
Open-cell porous Ti with a porosity ranging from 35 to 84% was successfully manufactured by sintering titanium fibres. The microstructure of the porous titanium was observed by SEM and the compressive mechanical properties were tested. By adjusting the spiral structure of the porous titanium, the pore size can be controlled in a range of 150-600 microm. With the increasing of the porosity, compressive yield strength and modulus decrease as predicated. However, high mechanical properties were still obtained at a medium porosity, e.g. the compressive yield strength and the modulus are as high as 100-200 MPa and 3.5-4.2 GPa, respectively, when the porosity is in the range of 50-70%. It was suggested that the porous titanium be strong enough to resist handing during implantation and in vivo loading. It is expected to be used as biocompatible implant, because their interconnected porous structures permit bone tissues ingrowth and the body fluids transportation.
通过烧结钛纤维成功制造出孔隙率在35%至84%之间的开孔多孔钛。通过扫描电子显微镜观察多孔钛的微观结构，并测试其压缩力学性能。通过调整多孔钛的螺旋结构，孔径可控制在150 - 600微米范围内。随着孔隙率的增加，压缩屈服强度和模量如预期的那样降低。然而，在中等孔隙率下仍可获得较高的力学性能，例如当孔隙率在50% - 70%范围内时，压缩屈服强度和模量分别高达100 - 200兆帕和3.5 - 4.2吉帕。结果表明，多孔钛足够坚固，能够抵抗植入过程中和体内加载时的外力作用。由于其相互连通的多孔结构允许骨组织向内生长并实现体液运输，因此有望用作生物相容性植入物。
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