Electrochemical polishing of Ti–13Nb–13Zr alloy

Silver-Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) cathodes were prepared in two ways. In the first method, Ag-BSCF composite powder was prepared in ethanol solution, where Ag nanoparticles serving as a component in the preparation of Ag-BSCF composite cathodes had been previously obtained via one-step synthesis in absolute ethanol using a neutral polymer (polyvinylpyrrolidone). To the best of our knowledge, this is the first study to use a Ag sol obtained by the above method for preparation of Ag-BSCF composite powder. Then, a paste containing this powder was screen-printed on a Sm 0.2 Ce 0.8 O 1.9 electrolyte and sintered at 1,000°C. In the second technique, an aqueous solution of AgNO 3 was added to a previously sintered BSCF cathode, which was then sintered again at 800°C. The oxygen reduction reaction at the quasi-point BSCF cathode on the Sm 0.2 Ce 0.8 O 1.9 electrolyte was tested by electrochemical impedance spectroscopy at different oxygen concentrations in three electrode setup. The continuous decrease of polarization resistance was observed under polarization −0.5 V at 600°C. The comparative studies of both obtained composite Ag-BSCF materials were performed in hydrogen-oxygen IT-SOFC involving samariadoped ceria as an electrolyte and Ni-Gd 0.2 Ce 0.8 O 1.9 anode. In both cases, the addition of silver to the cathode caused an increase in current and power density compared with an IT-SOFC built with the same components but involving a monophase BSFC cathode material.

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“…Instead of a capacitor, a constant phase element (CPE) can be used. The impedance of the CPE may be expressed by the following formula [67]:…”

Section: Eis Spectramentioning

confidence: 99%

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Mosiałek

Dudek

Michna

et al. 2014

J Solid State Electrochem

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“…The chemical composition of the electropolished Ti13Nb-13Zr alloy surface (Ti/Zr/Nb=4.0:0.55:1) is similar to the composition of the alloy (Ti/Zr/Nb=5.6:1:1), but the surface is depleted in titanium and zirconium. The chemical composition of the surface oxide layer formed at 100 V (Ti/ Zr/Nb=12.6:1:1) is similar to air-formed native oxide layer on that alloy (Ti/Zr/Nb=12.7:1.2:1), which is composed mainly of TiO 2 , ZrO 2 , and Nb 2 O 5 , with a small amount of TiO and Ti 2 O 3 [30,41]. Note however that the oxidized surface is strongly depleted in both zirconium and niobium in comparison to the alloy.…”

Section: Resultsmentioning

confidence: 72%

“…1 The electropolishing leads to the smoothing and brightening of the Ti-13Nb-13Zr alloy surface (Fig. 2) [30]. Application of the voltage lower than the breakdown voltage gives the oxide layer which replicates the morphology of the substrate [20].…”

Section: Resultsmentioning

confidence: 99%

“…The solution temperature (25±0.1°C) was maintained with the UH-4 thermostat. The Ti-13Nb-13Zr alloy samples were polished in the bath composed of 12.5 M sulfuric acid, 5.5 M ethylene glycol, and 2.7 M ammonium fluoride [30].…”

Section: Methodsmentioning

confidence: 99%

“…Anodic treatment of the Ti13Nb-13Zr alloy is not widely described in the accessible literature. Investigations on electropolishing [30], preparation of the nanotubular oxide layers [31][32][33], and plasma electrolytic oxidation were conducted up to now [34][35][36][37][38]. Preparation of thin oxide layers on the Ti-13Nb-13Zr alloy was investigated by voltammetry but up to only 8 V [39,40].…”

Section: Introductionmentioning

confidence: 99%

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Anodic oxidation of the Ti–13Nb–13Zr alloy

Mosiałek

Nawrat

Szyk-Warszyńska

et al. 2014

J Solid State Electrochem

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This work presents the results of the investigations on the electropolishing and anodic oxidation of the Ti-13Nb-13Zr titanium alloy. Electropolishing was conducted in the solution containing ammonium fluoride and sulfuric acid, whereas the solution of phosphoric acid was used for anodic oxidation of the alloy. The influence of electropolishing and anodization process parameters on the texture (scanning electron microscopy (SEM)) and chemical composition (X-ray photoelectron spectroscopy (XPS)) of the surface layer was established. Electrochemical impedance spectroscopy in 5 % NaCl solution was used for the determination of the corrosion resistance of the alloy.

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Effect of Anodic Oxidation on Antibacterial Properties and Biocompatibility of Ti‐13Nb‐13Zr‐3Cu for Biomedical Application

Xu,

Hu,

Liu

et al. 2024

Adv Eng Mater

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Ti‐13Nb‐13Zr (TNZ), a representative of β‐type titanium alloys, has garnered significant interest in biomedical implant materials recently because of its high strength, and closer elastic modulus to human bone. However, TNZ alloy does not have antibacterial properties and has the potential to cause implant‐related infection, even implantation failure. Herein, TNZ alloy is alloyed by Cu element and the surface is modified by anodic oxidation (AO) to enhance the biocompatibility and antimicrobial qualities. The corrosion resistance, antimicrobial properties, and cytotoxicity of the TNZ‐3Cu alloy before and after anodization are studied by X‐ray diffraction, X‐ray photoelectron spectroscopy, scanning electron microscopy, electrochemical test, mechanical property test, and cell test. The experimental results show that the primary constituents of the TNZ‐3Cu alloy are α″ martensite and β phase after solid solution treatment. The elastic modulus of TNZ‐3Cu alloy is (65 ± 1.33) GPa, 9 GPa lower than that of TNZ alloy. The AO treatment significantly improves the hydrophilicity and antibacterial properties as well as the corrosion resistance by the formation of a dense oxides composites coating. The cell test results show that the coating improves the initial adhesion of cells by the high hydrophilic surface and promotes the proliferation of cells by the release of copper ions.

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Electrochemical polishing of Ti–13Nb–13Zr alloy

Cited by 54 publications

References 37 publications

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Anodic oxidation of the Ti–13Nb–13Zr alloy

Effect of Anodic Oxidation on Antibacterial Properties and Biocompatibility of Ti‐13Nb‐13Zr‐3Cu for Biomedical Application

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