Selective Laser Sintering Method Using Titanium Powder Sheet Toward Fabrication of Porous Bone Substitutes
Selective Laser Sintering Method Using Titanium Powder Sheet Toward Fabrication of Porous Bone Substitutes
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DOI：
10.1299/jsmea.48.369
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发表时间：
2005-10
期刊：
影响因子：
--
通讯作者：
T. Hayashi;K. Maekawa;M. Tamura;K. Hanyu
中科院分区：
文献类型：
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作者：
T. Hayashi;K. Maekawa;M. Tamura;K. Hanyu
本文研究了激光烧结钛片以制造多孔人造骨。新颖之处在于使用与有机粘合剂混合的钛粉片以及选择性激光烧结在层压多孔结构的制造中的应用。具有短扫描路径的 Nd:YAG 脉冲的交替照射可抑制烧结部件的变形并增强机械性能。在实验确定的适当条件下，当施加平行于层压方向的载荷时，弯曲强度为63MPa，杨氏模量为1.5GPa，而垂直于层压方向的载荷分别产生79MPa和1.8GPa。孔隙尺寸为200～300μm，孔隙率约为65%。除杨氏模量外，这些值几乎与人体骨骼的值相同。
The present paper investigates the laser sintering of titanium sheets toward the fabrication of porous artificial bones. The novelty lies in the use of a titanium powder sheet mixed with an organic binder and the application of selective laser sintering to the fabrication of a laminated porous structure. Alternating irradiation of Nd: YAG pulses with short scanning paths results in the suppression of distortion of the sintered part as well as enhanced mechanical properties. Under the appropriate conditions identified in the experiment, a bending strength of 63MPa and a Young’s modulus of 1.5GPa are attained when the load is applied parallel to the lamination direction, whereas load vertical to the lamination direction yields 79MPa and 1.8GPa, respectively. The size of pores varies from 200 to 300µm, and the porosity is approximately 65%. These values, other than Young’s modulus, are almost equivalent to those of human bones.