采用粉末烧结法和燃烧合成法制备了多孔Ti50Ni48Fe2 (at%)形状记忆合金.前者通过添加不同含量的造孔剂(NH4HCO3)来调节控制多孔合金的孔隙特性如孔隙形貌、孔隙度、平均孔隙尺寸;而后者通过生坯的孔隙度来控制合金的上述孔隙特性.通过两种方法制备的多孔TiNiFe合金的孔隙特性满足多孔植入材料的孔隙要求,是理想的多孔植入候选材料.
Porous Ti50Ni48Fe2 (at%) shape memory alloys (SMAs) were fabricated through powder sintering and combustion synthesis, respectively. Pore characteristics like pore morphology, porosity and mean pore size of the sintered porous TiNiFe SMA can be adjusted by the amount of pore forming agent of NH4HCO3 powders. While pore characteristics of the synthesized porous alloy is regulated by the green porosity of the compact. From the viewpoint of pore characteristics requirements of porous prosthesis materials, porous TiNiFe SMAs produced from the two methods are promising porous implant candidates.
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