Porous Titanium Implants : Fabrication and Properties(Synergy by Porous and Composite Materials)

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In this paper, two types of powder-sheet lamination methods for forming porous titanium implants are reported: one is direct laser sintering, and the other is a combined process of laser cutting with plasma spark sintering. The novelty lies in the use of sheet formed by mixing titanium powder with organic agents. The sheet is sintered layer-by-layer under argon atmosphere using a pulsed Nd: YAG laser beam,or being cut and stacked into a carbon mold followed by spark plasma sintering. Operating parameters have extensively been examined to obtain implants that meet practical requirements. As a result, the use of NaCl as space-holding particles prevents melted titanium from drooping into pores, which leads to fabricating an internal structure with uniformly distributed pores. The combined method also enables the control of pore size and its distribution.
一般社団法人日本機械学会の論文
2006-09-19