(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 采用新型泡沫浸渍法制备具有较高强度和良好生物相容性的泡沫铌。利用SEM、 XRD和CS600碳硫测试仪分析泡沫铌的微观结构、形貌及相组成，同时对多孔材料的孔隙结构和力学性能进行分析。结果表明：制备的泡沫铌具有与人体松质骨相似的三维、连通孔隙结构，其碳含量为0.049%(质量分数)；泡沫铌的抗压强度随着烧结温度的升高先增加后降低，而弹性模量随着烧结温度的升高而增大；烧结温度为1 750 ℃时，其抗压强度为36.69 MPa，弹性模量为0.815 GPa，与人体松质骨的力学性能相匹配。
关键字: 泡沫铌；浸渍；烧结温度；力学性能
mechanical properties and microstructure of Nb foams
（State Key laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:Nb foams with high strength and excellent biocompatibility were prepared by a novel foam dipping. SEM, XRD and CS600 carbon and sulfur analyzer were used to characterize the microstructures, morphologies and phase constituents, respectively. And the mechanical properties and pore structures were also analyzed. The results show that the Nb foams have three-dimensional, connected pore structure, and the carbon content is 0.049% (mass fraction). The pure phase in the porous niobium-based materials was prepared by solid phase sintering, which is similar to the structure of cancellous bone. With sintering temperature increasing, the compressive strength increases and then reduces, while the elastic modulus increases with the sintering temperature increasing. When the sintering temperature is 1 750 ℃, the compressive strength of Nb foams is 36.69 MPa and the elastic modulus is 0.815 GPa, which coincides with the mechanical properties of the cancellous bone.
Key words: Nb foams; dipping; sintering temperature; mechanical properties
