Nb含量对多孔Ti-Nb合金组织与力学性能的影响  

Effect of Nb content on microstructure and mechanical properties of porous Ti-Nb alloys

作　　者：苏苏 李明骜 刘俊逸 李娟 高宇 康文武 SU Su;LI Ming’ao;LIU Junyi;LI Juan;GAO Yu;KANG Wenwu(College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《材料工程》2024年第9期141-149,共9页Journal of Materials Engineering

基　　金：重庆市教委科学技术研究项目(KJQN202101138,KJQN202201143);2022年度重庆博士后研究项目特别资助项目(2022CQBSHTB2026);重庆市研究生科研创新项目(CYS23646)。

摘　　要：利用真空烧结技术制备获得不同含量Nb元素的多孔Ti-Nb合金,研究Nb元素含量对多孔Ti-Nb合金孔隙形貌、孔隙率、显微组织、弹性模量以及耐磨损性能的影响。结果表明:随着Nb元素含量的增加,多孔Ti-Nb合金的孔隙形貌无明显变化,其孔隙率逐渐增加。多孔Ti-Nb合金主要由α相和β相组成,其中,由于Nb元素中β相稳定作用,随着Nb元素含量的增加,合金中β相的体积分数显著增加,合金的抗压强度和弹性模量逐渐降低。多孔Ti-Nb合金在模拟体液(SBF)中的耐磨性主要受合金中β相和α相体积比的影响,当β相和α相体积比超过61.7/38.3时,合金的耐磨性逐渐提高。Porous Ti-Nb alloys with different contents of Nb elements were prepared by vacuum sintering technology.The effects of Nb element contents on pore morphologies,porosities,microstructures,elastic modulus,and wear resistances of porous Ti-Nb alloys were investigated.The results show that with the ascent of Nb element contents,the pore morphology of porous Ti-Nb alloys does not change significantly,and the porosities increase gradually.The porous Ti-Nb alloys are mainly composed ofα-p h a s e a n dβ-phase,in which,due to theβ-phase stabilizing effect of Nb elements,the volume fraction of theβ-phase in the alloys increases significantly with the increase of the Nb element content,and the compressive strength and elastic modulus of the alloys decrease gradually.The wear resistance of porous Ti-Nb alloys in simulated body fluid(SBF)is mainly related to the volume ratio ofβ-phase toα-phase.When the volume ratio ofβ-phase toα-phase exceeds 61.7/38.3,the wear resistance of the alloy gradually improves.

关 键 词：多孔Ti-Nb合金 组织演化 弹性模量 摩擦磨损性能 

分 类 号：TG135[一般工业技术—材料科学与工程] TB31[金属学及工艺—合金]