| 2 | Microstructure,mechanical property and corrosion behavior of porous Ti-Ta-Nb-Zr显示文摘In this paper,biomedical porous Ti-Nb-Ta-Zr with 40%porosity and 166±21μm macro-pore size was successfully fabricated by space holder method.The microstructure,Vickers hardness,compressive and electrochemistry behavior were studied.It results that a few second phases exist inβmatrix of the porous Ti-Nb-Ta-Zr.Its Young's modulus is 0.8 GPa,close to 0.01-3 GPa for trabecular bone.The total recovery strain ratio and pseudoelastic strain ratio are 8.8%and 2.7%,respectively.It fails mainly by brittle cleavage with the fan-shaped and smooth cleaved facets.Although,local ductile fracture by a few dimples and a small amount of transcrystalline fracture with the cleavage of similarly oriented laths in a colony are observed on the fracture surface.The impedance spectrum of porous Ti-Nb-Ta-Zr has the characteristics of half capacitive arc resistance,showing good corrosion resistance in SBF solution. | B.Q.Li R.Z.Xie X.Lu | 2020 | Bioactive Materials2020，5，3： | 1 |
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