scholarly journals A Comparative Study of Hydroxyapatite Coating Produced with Plasma Electrolytic Oxidation and Hydrothermal Treatment on Titanium Alloys: Ti6Al4V and Ti6Al7Nb for Dental Implants

2018 ◽  
Author(s):  
Elinor Nahum ◽  
Svetlana Lugovskoy
Keyword(s):  
Dental Implants ◽  
Plasma Electrolytic Oxidation ◽  
Water Solution ◽  
Thickness Gauge ◽  
Solution Ph ◽  
Ti Alloys ◽  
Electrolytic Oxidation ◽  
Water Ph ◽  
Mechanical Properties And Corrosion ◽  
Plasma Electrolytic

Ti and Ti alloys are materials usually used in contact with hard tissue for applications such as artificial joints and dental implants. Ti6Al4V is a very common alloy used for dental implants, owing to its good mechanical properties and corrosion resistance. Nevertheless, because of uncertainties regarding the toxicity of vanadium and its influence on the human body, other Ti alloys containing no vanadium and retaining suitable properties are used. In this work Ti6Al4V and Ti6Al7Nb were oxidized in a water solution of calcium acetate (Ca(CH3COO)2) and calcium glycerophosphate (Ca(PO4CH(CH2OH)2) by Plasma Electrolytic Oxidation (PEO) for 20 minutes and then were hydrothermally treated (HTT) in water (pH=7) and in potassium hydroxide (KOH) solution (pH=11) for 2 hours at 200°C in a pressurized reactor. The surface morphologies, elemental composition and phase components were characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD), respectively. The surface roughness was measured by Atomic Force Microscope (AFM) and thickness measurements were made by SEM and thickness gauge. Also, corrosion tests were made to evaluate the corrosion behavior of the two alloys. The aim of this study is to compare two viable Ti alloys, Ti6Al4V and Ti6Al7Nb, and to attain on their surface hydroxyapatite (HA) coating improving the osseointegration, as it simulates a human bone.

scholarly journals A Comparative Study of Hydroxyapatite Coating Produced with Plasma Electrolytic Oxidation and Hydrothermal Treatment on Titanium Alloys: Ti6Al4V and Ti6Al7Nb for Dental Implants

2018 ◽  
Author(s):  
Elinor Nahum ◽  
Svetlana Lugovskoy
Keyword(s):  
Titanium Alloys ◽  
Dental Implants ◽  
Human Body ◽  
Water Solution ◽  
Thickness Gauge ◽  
Solution Ph ◽  
Electrolytic Oxidation ◽  
Water Ph ◽  
Mechanical Properties And Corrosion ◽  
Plasma Electrolytic

Titanium and Titanium alloys are considered perfect materials for applications in a human body, such as artificial joints and dental implants.  Ti6Al4V is a very common alloy used for dental implants, owing to its good mechanical properties and corrosion resistance. Nevertheless, because of uncertainties regarding the toxicity of vanadium and its influence on the human body, other titanium alloys containing no vanadium and retaining suitable properties are used. The aim of this study is to compare two viable titanium alloys, Ti6Al4V and Ti6Al7Nb, and to attain on their surface hydroxyapatite (HA) coating improving the osseointegration, as it simulates a human bone. In this work Ti6Al4V and Ti6Al7Nb were oxidized in a water solution of calcium acetate (Ca(CH3COO)2) and calcium glycerophosphate (Ca(PO4CH(CH2OH)2) by Plasma   Electrolytic Oxidation (PEO) for 20 minutes and then were hydrothermally treated (HTT) in water (pH=7) and in KOH solution (pH=11) for 2 hours at 200°C  in a pressurized reactor. The surface morphologies, elemental composition and phase components were characterized by Scanning Electron Microscopy, Energy Dispersive Spectroscopy and X-Ray Diffraction, respectively. The surface roughness was measured by Atomic Force Microscope (AFM) and thickness measurements were made by SEM and thickness gauge.  Also, corrosion tests were made to evaluate the corrosion behavior of the two alloys.

Preparation of a novel yellow ceramic coating on Ti alloys by plasma electrolytic oxidation

2016 ◽  
Vol 307 ◽  
pp. 1297-1302 ◽  
Author(s):  
Yanli Jiang ◽  
Jiankang Wang ◽  
Bing Hu ◽  
Zhongping Yao ◽  
Qixing Xia ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Ceramic Coating ◽  
Ti Alloys ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

scholarly journals Spectroscopic study of micro-discharges during plasma electrolytic oxidation of Al-Zn-Si alloy

2019 ◽  
Vol 84 (8) ◽  
pp. 915-923 ◽  
Author(s):  
Stevan Stojadinovic ◽  
Rastko Vasilic
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Water Solution ◽  
Oxide Coating ◽  
Sodium Metasilicate ◽  
Plasma Electron ◽  
Constant Current ◽  
Oxide Coatings ◽  
Constant Current Density ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Plasma electrolytic oxidation (PEO) process of Al?Zn?Si alloy in water solution containing 4 g L-1 sodium metasilicate at constant current density of 400 mA cm?2 was investigated. The species present in PEO micro-discharges and their ionization stages were identified using optical emission spectroscopy technique. The obtained PEO spectrum consists of atomic/ionic lines originating from the elements present both in the substrate (Al, Zn) and the electrolyte (Na, O, H). Apart from atomic and ionic lines, AlO band at 484.2 nm was also detected. Plasma electron number density diagnostics was performed from the H? line shape. The electron temperature of 4000?400 K was estimated by measuring the relative line intensities of zinc atomic lines at 481.05 and 636.23 nm. In addition, surface morphology, chemical and phase composition of oxide coatings were investigated by SEM-EDS and XRD. Oxide coating morphology is strongly dependent of PEO time. The elemental components of PEO coatings are Al, Zn, O and Si. The oxide coatings are partly crystallized and mainly composed of gamma phase of Al2O3.

DC plasma electrolytic oxidation treatment of gum metal for dental implants

2019 ◽  
Vol 302 ◽  
pp. 10-20 ◽  
Author(s):  
Maciej Sowa ◽  
Michał Parafiniuk ◽  
Catarina M.S. Mouzêlo ◽  
Alicja Kazek-Kęsik ◽  
Ivan S. Zhidkov ◽  
...  
Keyword(s):  
Dental Implants ◽  
Plasma Electrolytic Oxidation ◽  
Dc Plasma ◽  
Oxidation Treatment ◽  
Electrolytic Oxidation ◽  
Gum Metal ◽  
Plasma Electrolytic

scholarly journals Mechanical properties and corrosion resistance of Mg-RE cast alloys and their plasma electrolytic oxidation

2021 ◽  
Vol 2144 (1) ◽  
pp. 012010
Author(s):  
S V Zasypkin ◽  
A O Cheretaeva ◽  
M R Shafeev ◽  
D L Merson ◽  
M M Krishtal
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Electrolytic Oxidation ◽  
Cast Alloys ◽  
Mechanical Properties And Corrosion ◽  
Plasma Electrolytic ◽  
Cast Magnesium

Abstract The effect of heat treatment on the mechanical properties (hardness, plasticity, yield and tensile strength) and corrosion resistance of several cast magnesium alloys with additions of rare earth metals (Y, Nd and Gd), and their surface modification by plasma electrolytic oxidation (PEO) were investigated. It was found that the heat treatment of the alloys results information of Mg12YZn, Mg3Zn3Y2 and Mg24Y5 based LPSO-phases and causes an increase in hardness and tensile strength by 5-7 and 20-25%, respectively, but at the same time, corrosion resistance of the alloysdrops by 10-20 times. PEO of the alloys after heat treatment reduced the corrosion currents by 1-3 orders of magnitude without changing the corrosion potential.

scholarly journals Bio-Functional Coating on Ti6Al4V Surface Produced by Using Plasma Electrolytic Oxidation

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1124
Author(s):  
Aqmar Zakaria ◽  
Hamdi Shukor ◽  
Masahiro Todoh ◽  
Kamaruzaman Jusoff
Keyword(s):  
Dental Implants ◽  
Plasma Electrolytic Oxidation ◽  
Energy Dispersive Spectrometer ◽  
Antibacterial Properties ◽  
Functional Surface ◽  
Functional Coating ◽  
Fluoridated Hydroxyapatite ◽  
Coating Surface ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

One way to improve the biofunctionality of titanium alloys is by implementing plasma electrolytic oxidation (PEO) to incorporate bioactive elements such as fluoridated hydroxyapatite, into surface coatings of orthopaedic and dental implants. Hydroxyapatite (HAp) is known as a bioactive coating while fluorapatite (FAp) has an antibacterial effect that would enhance the bio-functionality and reduce the failure rate of orthopaedic and dental implants. The purpose of this study was to develop fluoridated hydroxyapatite as a bio-functional coating on Ti6Al4V with electrolyte containing trisodium orthophosphate, potassium hydroxide, and calcium fluoride. The coating surface and cross-section morphologies were evaluated, and the species in the electrolyte solution were found, and irregular micropores shapes were observed by field emission scanning electron microscopy (FESEM) and energy dispersive spectrometer (EDS). The phase composition of the coating surface containing TiO2 (anatase and rutile), tricalcium orthophosphate, HAp, and FAp was characterized by X-ray diffractometer (XRD). The adhesive strength of the coating was analysed by a micro-scratch test. Simulated body fluid (SBF) immersion test was performed to investigate the bioactivity of the coating. In this study, we demonstrated that the PEO technique has a good potential to develop bio-functional surface modifications that can affect the chemical composition and roughness of the coating surface. The FAp coating may provide insights for subsequent bioactive coatings while improving the antibacterial properties for orthopaedic and dental implants. Future work shall investigate the optimal amount of fluoride in the coating layer that obtains excellent results without causing adverse effects on adjacent tissue.

Plasma electrolytic oxidation (PEO) for production of anodised coatings on lightweight metal (Al, Mg, Ti) alloys

2009 ◽  
Vol 87 (3) ◽  
pp. 122-135 ◽  
Author(s):  
F. C. Walsh ◽  
C. T. J. Low ◽  
R. J. K. Wood ◽  
K. T. Stevens ◽  
J. Archer ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Ti Alloys ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

scholarly journals Formation and Properties of Oxide Coatings with Immobilized Zeolites Obtained by Plasma Electrolytic Oxidation of Aluminum

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1241
Author(s):  
Kristina Mojsilović ◽  
Uroš Lačnjevac ◽  
Srna Stojanović ◽  
Ljiljana Damjanović-Vasilić ◽  
Stevan Stojadinović ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Processing Time ◽  
Water Solution ◽  
Activity Levels ◽  
Oxide Coatings ◽  
X Ray ◽  
Electrolytic Oxidation ◽  
Chemical And Phase Compositions ◽  
Plasma Electrolytic ◽  
Peo Coatings

In this paper, we employed plasma electrolytic oxidation (PEO) of aluminum in a water solution of sodium tungstate (Na2WO4∙2H2O) with the addition of the pure and Ce-loaded zeolites clinoptilolite and 13 X for the preparation of oxide coatings. The obtained coatings were characterized with respect to their morphologies and chemical and phase compositions using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, atomic force microscopy, and X-ray diffraction. The prepared coatings contained γ-alumina, WO3, and metallic tungsten. The surface morphologies of the obtained coatings strongly depended on the PEO processing time; the roughness of all coatings increased with PEO time, while porosity decreased with PEO processing time as a result of microdischarge coalescence and growth. All coatings contained elements originating from the substrate and from the electrolytes. Coatings containing zeolites with Ce showed higher photoactivity than those with immobilized pure zeolites. The highest photocatalytic activity levels were observed for coatings containing immobilized Ce-exchanged clinoptilolite processed for 10 min. It was observed that both clinoptilolite and 13X zeolites improved the features of the PEO coatings in a similar manner, making natural and abundant clinoptilolite an excellent candidate for various applications.

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