Microstructure and wear resistance of oxide coatings on Ti–6Al–4V produced by plasma electrolytic oxidation in an inexpensive electrolyte

Khorasanian, M.; Dehghan, Alireza; Shariat, M.H.; Bahrololoom, M.E.; Javadpour, Sirus

doi:10.1016/j.surfcoat.2011.09.038

Cited by 96 publications

(32 citation statements)

References 36 publications

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“…To improve wear, corrosion and photocatalytic properties of valve metals including Al [7,28,29], Ti [4,[30][31][32][33], Mg [1,[34][35][36][37], and Zr [38][39][40], surface oxidation techniques, such as Micro Arc Oxidation have been successfully used. Micro Arc Oxidation (MAO) process [41][42][43] is a relatively new method to oxidize metallic surfaces which has attracted many research works in recent years. Due to the simultaneous effect of electrochemical oxidation and thermal effects of a plasma environment, the MAO-grown coatings benefit from the both thermal and electrochemical oxidations [29].…”

Section: Introductionmentioning

confidence: 99%

“…Advantages like a short processing time, biocompatibility, ability to control phase composition and surface morphology, and high coating thicknesses [4,41,42,44,45] distinguish this method from other conventional methods. The applied voltage in MAO process usually is in the order of hundreds of volts resulting in a strong electric field between anode and cathode (about 10 2 V m −1 between the anode and cathode and it may increase up to 10 6 V m −1 across the interface metal/oxide/electrolyte) [41][42][43]46] forcing insoluble charged particles in the electrolyte to move towards electrodes with opposite charge due to the electrophoretic effects [11,29,41,47]. For example, if the electrolyte contains insoluble negatively charged particles, a composite coating consisted of an oxide matrix with the dispersed ceramic particles forms on the surface of anode [11,29,48,49].…”

Section: Introductionmentioning

confidence: 99%

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How deposition parameters affect corrosion behavior of TiO2-Al2O3 nanocomposite coatings

Niazi

Yari

Golestani‐Fard

et al. 2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How deposition parameters affect corrosion behavior of TiO2-Al2O3 nanocomposite coatings

Niazi

Yari

Golestani‐Fard

et al. 2015

Applied Surface Science

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“…A localized electric field is produced between the Ti6Al4V and the negative charges, the gas inside the bubbles is ionized and the incidence is the plasma discharge. PEO attracted growing of oxides on the surface including the elements present in the electrolytic solution [10]. Additionally, it has been investigated coatings no obtained by PEO with constituent agents that help to prevent infection in implanted devices, preventing the growth of bacterial biofilms.…”

Section: Introductionmentioning

confidence: 99%

EIS, Mott Schottky and EFM analysis of the electrochemical stability and dielectric properties of Ca-P-Ag and Ca-P-Si-Ag coatings obtained by plasma electrolytic oxidation in Ti6Al4V

Leal-Marin

Estupiñán-Duran

2017

Rev. Fac. Ing. Univ. Antioquia

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Ti6Al4V ELI (ASTM F136) alloy is one of the most used alloys in devices for osteosynthesis and joint replacement. However, the properties of this alloy can be improved regarding biocompatibility and the osteointegration with the bone tissue through coatings. The aim of this study was the evaluation of the electrochemical behavior of a coating obtained by plasma electrolytic oxidation on Ti6Al4V ELI, using electrolyte solutions enriched with PO 4 2-, Ca +2, Si +4 ions and various concentrations of Ag +1. The coatings were characterized by electrochemical impedance spectroscopy (EIS) and Mott-Schottky (M-S) in a three-electrode cell with a simulated physiological solution. The electrochemical behavior was compared with electrostatic force microscopy (EFM). The EIS results showed improved stability properties in corrosion for Ca-P-Ag coatings, compared with Ca-P-Si-Ag. Nyquist and Bode Spectra showed relaxations related to charge transference to the double electrochemical layer and the reflex of the microstructural changes and conductivity of the coating given by its composition. According to with M-S results, all the samples showed an n-type conductivity increased with silver inclusion. The potential, the phase, and amplitude of the coatings with silver inclusion compared to uncoated Ti6Al4V were observed by EFM. RESUMEN:El Ti6Al4V ELI (ASTM F136) es una de las aleaciones más empleadas en dispositivos de osteosíntesis y reemplazo articular. Sin embargo, las propiedades de esta aleación pueden ser mejoradas respecto a su biocompatibilidad y osteointegración con el tejido óseo a través de recubrimientos. El objetivo de este trabajo fue evaluar el comportamiento electroquímico de un recubrimiento obtenido por oxidación por plasma electrolítico sobre Ti6Al4V ELI empleando soluciones electrolíticas enriquecidas con iones de PO 4 2-, Ca +2 , Si +4 y varias concentraciones de Ag +1. Los recubrimientos se caracterizaron mediante espectroscopia de impedancia electroquímica (EIS) y Mott-Schottky (M-S) en una celda de tres electrodos con una solución fisiológica simulada. El comportamiento electroquímico se contrastó con microscopía de fuerza electrostática (EFM), donde se analizó el potencial eléctrico del recubrimiento. Los resultados de EIS mostraron mejores propiedades de estabilidad frente a la corrosión en los sustratos recubiertos con Ca-P-Ag, comparados con los recubiertos con Ca-P-Si-Ag. Los espectros de Nyquist y Bode mostraron relajaciones relacionadas con la transferencia de carga hacia la doble capa electroquímica como reflejo de los cambios microestructurales y de conductividad de los recubrimientos, dada por la presencia particular en cada caso, de los elementos contenidos en estos. De acuerdo con los resultados de M-S, todas las muestras ensayadas presentaron un comportamiento con dopado tipo n, cuya conductividad incrementó con la inclusión de plata. Mediante EFM se observaron mayores contrastes en el potencial, fase y la amplitud de los recubrimientos con mayor cantidad de plata respecto al Ti6Al...

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“…PEO actually anodizes the substrate at high potentials in the presence of plasma discharges. A high local temperature and pressure are being produced on the substrate surface by plasma, forming a hard complex oxide film consisting of substrate metal and electrolyte constituents [1]. During PEO process, the potential reaches to amounts higher than the dielectric break-down voltage, thereby producing a hard alumina film [2].…”

Section: Introductionmentioning

confidence: 99%

An investigation of the characteristics of Al2O3/TiO2 PEO nanocomposite coating

Bahramian

Raeissi

Hakimizad

2015

Applied Surface Science

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Microstructure and wear resistance of oxide coatings on Ti–6Al–4V produced by plasma electrolytic oxidation in an inexpensive electrolyte

Cited by 96 publications

References 36 publications

How deposition parameters affect corrosion behavior of TiO2-Al2O3 nanocomposite coatings

How deposition parameters affect corrosion behavior of TiO2-Al2O3 nanocomposite coatings

EIS, Mott Schottky and EFM analysis of the electrochemical stability and dielectric properties of Ca-P-Ag and Ca-P-Si-Ag coatings obtained by plasma electrolytic oxidation in Ti6Al4V

An investigation of the characteristics of Al2O3/TiO2 PEO nanocomposite coating

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