Effect of Nb content on microstructure and mechanical properties of porous Ti-Nb alloys
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 of α-phase and β-phase,in which,due to the β-phase stabilizing effect of Nb elements,the volume fraction of the β-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 of β-phase to α-phase.When the volume ratio of β-phase to α-phase exceeds 61.7/38.3,the wear resistance of the alloy gradually improves.
porous Ti-Nb alloymicrostructure evolutionelastic modulusfriction and wear property
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