(中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 采用新型泡沫浸漬法制備具有較高強(qiáng)度和良好生物相容性的泡沫鈮。利用SEM、 XRD和CS600碳硫測(cè)試儀分析泡沫鈮的微觀結(jié)構(gòu)、形貌及相組成，同時(shí)對(duì)多孔材料的孔隙結(jié)構(gòu)和力學(xué)性能進(jìn)行分析。結(jié)果表明：制備的泡沫鈮具有與人體松質(zhì)骨相似的三維、連通孔隙結(jié)構(gòu)，其碳含量為0.049%(質(zhì)量分?jǐn)?shù))；泡沫鈮的抗壓強(qiáng)度隨著燒結(jié)溫度的升高先增加后降低，而彈性模量隨著燒結(jié)溫度的升高而增大；燒結(jié)溫度為1 750 ℃時(shí)，其抗壓強(qiáng)度為36.69 MPa，彈性模量為0.815 GPa，與人體松質(zhì)骨的力學(xué)性能相匹配。
關(guān)鍵字: 泡沫鈮；浸漬；燒結(jié)溫度；力學(xué)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
