Photo-electrochemical investigation of anodic oxide films on cast Ti–Mo alloys. I. Anodic behaviour and effect of alloy composition

Oliveira, Nilson T. C.; Guastaldi, Antônio Carlos; Piazza, S.; Sunseri, C.

doi:10.1016/j.electacta.2008.08.074

Cited by 17 publications

(18 citation statements)

References 64 publications

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“…It was previously proved that the corrosion resistance of Ti-Mo alloys was improved with the addition of Mo, which was attributed to the passive film formation of mixed TiO 2 and MoO 3 oxides. 47,48 Similarly, it was reasonably inferred that a mixture of Zr-oxide and Mo-oxide generated on the metallic surface, which was responsible for the high corrosion resistance of the studied Zr-Mo alloys. Besides, the mixed passive film consisting of Zr-and Mo-oxides was more stable than single passive film ZrO 2 .…”

Section: Discussionmentioning

confidence: 97%

Microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of Zr–Mo alloys

et al. 2012

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In this study, the microstructure, mechanical properties, corrosion behaviors, and in vitro biocompatibility of Zr-Mo alloys as a function of Mo content after solution treatment were systemically investigated to assess their potential use in biomedical application. The experimental results indicated that Zr-1Mo alloy mainly consisted of an acicular structure of a 0 phase, while x phase formed in Zr-3Mo alloy. InZr-5Mo alloy, retained b phase and a small amount of precipitated a phase were observed. Only the retained b phase was obtained in Zr-10Mo alloy. Zr-1Mo alloy exhibited the greatest hardness, bending strength, and modulus among all experimental Zr-Mo alloys, while b phase Zr-10Mo alloy had a low modulus.

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Section: Discussionmentioning

confidence: 97%

Microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of Zr–Mo alloys

et al. 2012

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“…Samples of Ti-15Mo (wt%) alloy was obtained by the authors using arc-melting furnace under ultra-pure argon atmosphere, following a procedure well described in the literature [4,[16][17][18]. The composition was analyzed by EDX and XRF and found to be quite close to the nominal values.…”

Section: Methodsmentioning

confidence: 99%

“…The high corrosion resistance of Ti-Mo alloys is due to the presence of Mo in their composition and in oxide film surface [15][16][17]. According to Oliveira and Guastaldi [4,18] and Oliveira et al [16] have reported the ability of Ti-Mo alloys having 4-20 wt% Mo to exhibit spontaneous passivation in Ringer's solution and to prevent pitting at potentials up to 8 V [vs. saturated calomel electrode (SCE)].…”

Section: Introductionmentioning

confidence: 99%

“…The behavior of Ti alloys in simulated physiological media can be studied by electrochemical techniques, such as open-circuit potential (E oc ), potentiodynamic polarization, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), which can be used to study the influence of Mo in the corrosion resistance of the passive film, metal alloy oxidation or dissolution of the oxide film formed on the alloy surface [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical behavior and corrosion resistance of Ti–15Mo alloy in naturally-aerated solutions, containing chloride and fluoride ions

Rodrigues

Oliveira

Santos

et al. 2015

J Mater Sci: Mater Med

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The electrochemical behavior and corrosion resistance of Ti-15Mo alloy to applications as biomaterials in solutions 0.15 mol L -1 Ringer, 0.15 mol L -1 Ringer plus 0.036 mol L -1 NaF and 0.036 mol L -1 NaF (containing 1,500 ppm of fluoride ions, F -) were investigated using open-circuit potential, cyclic voltammetry, and electrochemical impedance spectroscopy techniques, X-ray photoelectron spectroscopy and scanning electron microscope. Corrosion resistance and electrochemical stability of the Ti15Mo alloy decreased in solutions containing F -ions. In all cases, there were formation and growth of TiO 2 and MoO 3 (a protector film), not being observed pitting corrosion, which might enable Ti-15Mo alloys to be used as biomedical implant, at least in the studied conditions, since the electrochemical stability and corrosion resistance of the passive films formed are necessary conditions for osseointegration.

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“…So far, several surface modification methods have been employed to activate the Ti-Mo alloys, such as thermal oxidation [18], plasma electrolytic oxidation [34,35], anodic oxidation [36,37] and alkaliheat treatment [10,11,21,38,39]. Among these processes, the alkali-heat treatment proposed by Kokubo's team [40] is a cost-effective and efficient way to induce apatite layer formation on the Ti-based alloys substrate.…”

Section: Introductionmentioning

confidence: 99%

Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

Zhang

Bao

et al. 2017

Sci. China Mater.

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Biomedical porous Ti-15Mo alloys were prepared by microwave sintering using ammonium hydrogen carbonate (NH 4 HCO 3 ) as the space holder agent to adjust the porosity and mechanical properties. The porous Ti-15Mo alloys are dominated by β-Ti phase with a little α-Ti phase, and the proportion of α and β phase has no significant difference as the NH 4 HCO 3 content increases. The porosities and the average pore sizes of the porous Ti-15Mo alloys increase with increase of the contents of NH 4 HCO 3 , while all of the compressive strength, elastic modulus and bending strength decrease. However, the compressive strength, bending strength and the elastic modulus are higher or close to those of natural bone. The surface of the porous Ti-15Mo alloy was further modified by hydrothermal treatment, after which Na 2 Ti 6 O 13 layers with needle and flake-like clusters were formed on the outer and inner surface of the porous Ti-15Mo alloy. The hydrothermally treated porous Ti-15Mo alloy is completely covered by the Ca-deficient apatite layers after immersed in SBF solution for 14 d, indicating that it possesses high apatiteforming ability and bioactivity. These results demonstrate that the hydrothermally treated microwave sintered porous Ti15Mo alloys could be a promising candidate as the bone implant.

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Photo-electrochemical investigation of anodic oxide films on cast Ti–Mo alloys. I. Anodic behaviour and effect of alloy composition

Cited by 17 publications

References 64 publications

Microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of Zr–Mo alloys

Microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of Zr–Mo alloys

Electrochemical behavior and corrosion resistance of Ti–15Mo alloy in naturally-aerated solutions, containing chloride and fluoride ions

Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

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