Plasma Electrolytic Oxidation of Valve Metals

Lugovskoy, Alex; Zinigrad, Michael

doi:10.5772/54827

Cited by 13 publications

(11 citation statements)

References 36 publications

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“…Upon the completion of electrical circuit, electrode kinetics conform to Faraday's laws and Ohm's law at low voltages, leading to a linear rise in current and voltage . During this phase, a passive oxide layer develops with gas evolution, that persists until the potential rises up to the breakdown potential . At this threshold potential microdischarging occurs due to the ionization of gas bubbles, resulting in local thickening of oxide layer .…”

Section: Plasma Electrolytic Oxidationmentioning

confidence: 94%

Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

Rizwan

Alias

Zaidi

et al. 2017

J Biomedical Materials Res

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Plasma electrolytic oxidation (PEO) is an advance technique to develop porous oxidation layer on light metals, primarily to enhance corrosion and wear resistance. The oxidation layer can also offer a wide variety of mechanical, biomedical, tribological, and antibacterial properties through the incorporation of several ions and particles. Due to the increasing need of antimicrobial surfaces for biomedical implants, antibacterial PEO coatings have been developed through the incorporation of antibacterial agents. Metallic nanoparticles that have been employed most widely as antibacterial agents are reported to demonstrate serious health and environmental threats. To overcome the current limitations of these coatings, there is a significant need to develop antibacterial surfaces that are not harmful for patient's health and environment. Attention of the readers has been directed to utilize bioactive glasses as antibacterial agents for PEO coatings. Bioactive glasses are well known for their excellent bioactivity, biocompatibility, and antibacterial character. PEO coatings incorporated with bioactive glasses can provide environment-friendly antimicrobial surfaces with exceptional bioactivity, biocompatibility, and osseointegration. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 590-605, 2018.

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Section: Plasma Electrolytic Oxidationmentioning

confidence: 94%

Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

Rizwan

Alias

Zaidi

et al. 2017

J Biomedical Materials Res

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“…The modification of surfaces through Plasma Electrolytic Oxidations (PEO) can successfully afford the aforementioned features by controlling the experimental conditions [30][31][32]. This technique has been efficaciously used for the surface treatment of Ta, Nb, Ti, and alloys for applications on biomaterials [33][34][35][36][37][38][39]. Thus, in the present paper, the Ti-25Nb-25Ta alloy was oxidized by PEO with phosphoric acid electrolyte and the experimental parameters were tailored to achieve favorable surface features for application on biomaterials area.…”

Section: Introductionmentioning

confidence: 99%

Ti-25Nb-25Ta alloy treated by plasma electrolytic oxidation in phosphoric acid for implant applications

Beilner

Pereira²,

Lepienski

et al. 2021

Matéria (Rio J.)

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Among titanium alloys with non-toxic elements, the Ti-25Nb-25Ta alloy has good elastic behavior for applications in osseous implants, biocompatibility, and excellent corrosion resistance. The present study aimed to better the biocompatibility characteristics of Ti-25Nb-25Ta alloy modifying its surface through Plasma Electrolytic Oxidation (PEO) treatment. The formed oxide coating is amorphous and composed of two distinct porous formations: smaller hole-shaped pores and larger volcano-like pores. The regions with the formation of smaller pores and in the hole shaped presented the highest atomic percentage of the chemical element phosphorus. Nanoindentation tests have shown that the hardness of the Ti-25Nb-25Ta alloy is slightly lower than the commercially pure grade 2 titanium (a material used as reference), while elastic modulus measurements of Ti-25Nb-25Ta presented more suitable values for implant application (lower values when compared with titanium reference). After PEO treatment there were significant mechanical surface improvements (increased fairly surface hardness and decreased elastic modulus) for application in osseous tissue. Despite the Ti-25Nb-25Ta alloy presented excellent characteristics for applications in hard biological tissues, the PEO treatment better its features.

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“…In this study, the surface modification aiming at the production of HA on the surface of Ti6Al4V and Ti6Al7Nb was made by using Plasma Electrolyte Oxidation (PEO), which is a simple technique for producing hard and rough coating having numerous micro-pores [5,6]. Using that technique, the insertion into the coating of such elements as calcium and phosphorous may be performed by just adding them to the electrolyte in a suitable form.…”

Section: Introductionmentioning

confidence: 99%

Production of Hydroxyapatite on the Surface of Ti6Al7Nb Alloy as Compared to Ti6Al4V Alloy

Nahum¹,

Lugovskoy²,

Lugovskoy³

2020

Corrosion [Working Title]

Self Cite

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Ti6Al4V is very commonly used for the production of dental implants. Titanium alloys whose mechanical and corrosion properties are equal or better than those of Ti6Al4V might present interest as plausible future materials, too. Ti6Al7Nb alloy was tested and compared to Ti6Al4V in this work. Samples of both alloys were oxidized in a water solution containing calcium acetate (Ca(CH 3 COO) 2) and calcium glycerophosphate (Ca(PO 4 CH(CH 2 OH) 2)) by Plasma Electrolytic Oxidation (PEO) for 20 min. After that, the samples 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 content and morphology of hydroxyapatite (HA) layers formed on the surface of both alloys after the PEO and subsequent HTT treatments were studied. 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. Corrosion measurements were performed for the comparison of the corrosion behavior of the two alloys.

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Plasma Electrolytic Oxidation of Valve Metals

Cited by 13 publications

References 36 publications

Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

Surface modification of valve metals using plasma electrolytic oxidation for antibacterial applications: A review

Ti-25Nb-25Ta alloy treated by plasma electrolytic oxidation in phosphoric acid for implant applications

Production of Hydroxyapatite on the Surface of Ti6Al7Nb Alloy as Compared to Ti6Al4V Alloy

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