Fabrication of Porous Ti-rich Ti51Ni49 by Evaporating NaCl Space Holder
Fabrication of Porous Ti-rich Ti51Ni49 by Evaporating NaCl Space Holder
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DOI：
10.1007/s11661-014-2196-2
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
F. Yen;K. Hwang;Shyi-Kaan Wu
中科院分区：
文献类型：
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作者：
F. Yen;K. Hwang;Shyi-Kaan Wu
通过压制和烧结含有细钛和镍粉末以及粗氯化钠粉末的压块，制备了具有良好控制孔隙率、孔径和孔形状的网状多孔富钛Ti51Ni49合金。在高真空中在 1323 K (1050 °C) 下烧结 30 分钟后，通过蒸发除去 NaCl 空间支架，剩余的 Ti 和 Ni 粉末与约 2.3 vol pct 液相一起烧结。烧结的 Ti51Ni49 复合片的孔隙率为 26%、64%、70%、78% 和 85%，并且没有观察到变形。 DSC 测试表明，MS 温度和 ΔHa 分别约为 347 K (74 °C) 和 28 J/g，并且它们几乎与孔隙率无关，并且接近于变形富钛 TiNi 合金。这些多孔 Ti51Ni49 复合材料具有均匀的微观结构，压缩性能和孔隙率接近人体骨骼。
Net-shaped porous Ti-rich Ti51Ni49alloy with well-controlled porosity, pore size, and pore shape are fabricated by pressing-and-sintering compacts containing fine Ti and Ni powders and coarse NaCl powders. After sintering at 1323 K (1050 °C) for 30 minutes in a high vacuum, the NaCl space holder is removed by evaporation, and the remaining Ti and Ni powders are sintered with about 2.3 vol pct liquid phase. The sintered Ti51Ni49compacts have porosities of 26, 64, 70, 78, and 85 pct, and no distortion is observed. DSC tests show that theMStemperature and ΔHare about 347 K (74 °C) and 28 J/g, respectively, and that they are almost independent of the porosity and close to those of wrought Ti-rich TiNi alloys. These porous Ti51Ni49compacts exhibit a homogeneous microstructure, and the compressive properties and porosity are close to those of human bones.