以尿素、碳酸氢铵和硬脂酸三种不同的材料作为造孔剂,采用粉末冶金法制备出多孔Ti-Nb-Ta-Mo-Zr合金。比较了相同质量分数不同造孔剂对多孔钛合金的显微形貌、孔隙率、抗压强度和弹性模量的影响。结果表明,加入碳酸氢铵的多孔材料孔隙率为34.38%,大部分孔洞直径小于100μm,平均直径为60~80μm,出现超大孔洞的情况较少;且添加碳酸氢铵的多孔材料成孔均匀,孔洞大多为圆形或近圆形,其抗压强度为130.75MPa,弹性模量为9.562 GPa,与人体骨骼的弹性模量相近。因此确定碳酸氢铵作为多孔Ti-2.1Nb-0.9Ta-14Mo-7Zr合金的造孔剂。 A porous Ti-Nb-Ta-Mo-Zr alloy was prepared by powder metallurgy using urea, ammonium bicarbonate and stearic acid as the pore-forming agents. The effects of different pore-forming agents on the micro-morphology, porosity, compressive strength and elastic modulus of porous titanium alloy were compared. The results show that the porosity of porous material with ammonium bicarbonate is 34.38%, the diameter of most pores is less than 100μm and the average diameter is 60 ~ 80μm, Most of the holes are round or nearly circular, with a compressive strength of 130.75 MPa and a modulus of elasticity of 9.562 GPa, which are similar to the elastic moduli of human bones. Thus, ammonium bicarbonate was identified as a pore former for the porous Ti-2.1Nb-0.9Ta-14Mo-7Zr alloy.