Details

Autor(en) / Beteiligte

• Li, B.Q.
• Xie, R.Z.
• Lu, X.

Titel

Microstructure, mechanical property and corrosion behavior of porous Ti–Ta–Nb–Zr

Ist Teil von

• Bioactive materials, 2020-09, Vol.5 (3), p.564-568

Ort / Verlag

China: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this paper, biomedical porous Ti–Nb–Ta–Zr with 40% porosity and 166 ± 21 μm 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 in β matrix 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. In this paper, biomedical porous Ti–Nb–Ta–Zr with 40% porosity and 166 ± 21 μm 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 in β matrix 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. [Display omitted] •Porous Ti–Nb–Ta–Zr alloy with mainly β phase was fabricated by space holder method.•Porous Ti alloy with 40% porosity and 166 ± 21 μm macro-pore size failed by brittle cleavage.•The total recovery strain ratio and pseudoelastic strain ratio are 8.8% and 2.7%, respectively.•The Young's modulus of porous TNTZ is 0.8 GPa, close to trabecular bone.•The impedance spectrum of porous TNTZ shows good corrosion resistance in SBF solution.