Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

Mashtalyar, D. V.; Nadaraia, Konstantine V.; Gnedenkov, Andrey S.; Imshinetskiy, I.M.; Piatkova, Mariia; Pleshkova, Arina I.; Belov, E. A.; Filonina, Valeriia S.; Suchkov, Sergey N.; Sinebryukhov, Sergey L.; Gnedenkov, Sergey V.

doi:10.3390/ma13184121

Cited by 43 publications

(22 citation statements)

References 65 publications

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“…The use of titanium and its alloys is due to its several unique properties, such as high corrosion resistance and strength, low density, high heat capacity, etc. [1][2][3][4][5]. However, titanium and its alloys require additional surface treatment for improving the tribological and corrosion properties [4,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, many researchers have developed a method for the formation of protective coatings on titanium alloys by plasma electrolytic oxidation (PEO) [1,[4][5][6]8,9]. After the analysis of previous studies, we have found that such surface layers are effective for protecting titanium from wear, prevent corrosion of metals in galvanic couple with titanium, and have a suitable surface structure for the formation of composite coatings (CC) by incorporating substances into the PEO layer for additional improving of the mechanical and electrochemical characteristics of the surface of treated material [5,10].…”

Section: Introductionmentioning

confidence: 99%

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Wearproof Composite Coatings on Ti

Mashtalyar¹

2022

Materials Research Proceedings

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Abstract. In this work the formation of protective coatings on VT1-0 commercially pure titanium by plasma electrolytic oxidation (PEO) and subsequent fluoropolymer treatment is presented. The structure, morphology, corrosion, and mechanical properties of the formed composite coatings were studied. It was established that PEO coatings are an excellent basis for the formation of a solid composite layer with high adhesion to its surface. The presence of polytetrafluoroethylene in the composition of the coating reduces the corrosion current density by 4 orders of magnitude and increases the wear resistance by 2 orders of magnitude in comparison with the base PEO coating.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wearproof Composite Coatings on Ti

Mashtalyar¹

2022

Materials Research Proceedings

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“…Due to the different electric regimes, not all results are comparable. PEO of Ti can be preformed in direct current (DC) [ 30 ], pulsed unipolar DC [ 31 ], and pulsed bipolar [ 32 ] regimes; all regimes can be realized either under current [ 33 ] or voltage control [ 34 ] and the combination of the regimes, and voltage ramping is also possible [ 35 ]. However, the question of the optimal PEO process duration and methods to understand in situ whether or not the process should be stopped is still open, especially for the treatment of titanium alloys under the voltage control.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biocompatible PEO Coating Growth on cp-Ti with In Situ Spectroscopic Methods

et al. 2021

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The problem of the optimization of properties for biocompatible coatings as functional materials requires in-depth understanding of the coating formation processes; this allows for precise manufacturing of new generation implantable devices. Plasma electrolytic oxidation (PEO) opens the possibility for the design of biomimetic surfaces for better biocompatibility of titanium materials. The pulsed bipolar PEO process of cp-Ti under voltage control was investigated using joint analysis of the surface characterization and by in situ methods of impedance spectroscopy and optical emission spectroscopy. Scanning electron microscopy, X-ray diffractometry, coating thickness, and roughness measurements were used to characterize the surface morphology evolution during the treatment for 5 min. In situ impedance spectroscopy facilitated the evaluation of the PEO process frequency response and proposed the underlying equivalent circuit where parameters were correlated with the coating layer properties. In situ optical emission spectroscopy helped to analyze the spectral line evolutions for the substrate material and electrolyte species and to justify a method to estimate the coating thickness via the relation of the spectral line intensities. As a result, the optimal treatment time was established as 2 min; this provides a 9–11 µm thick PEO coating with Ra 1 µm, 3–5% porosity, and containing 75% of anatase. The methods for in-situ spectral diagnostics of the coating thickness and roughness were justified so that the treatment time can be corrected online when the coating achieves the required properties.

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“…As an effective surface modification method, MAO has been widely used in aluminum (Al), Mg, and titanium (Ti) alloys [ 26 , 27 , 28 , 29 ]. The electrolyte composition plays an important role in the process of MAO.…”

Section: Introductionmentioning

confidence: 99%

Surface Treatment of Zn-Mn-Mg Alloys by Micro-Arc Oxidation in Silicate-Based Solutions with Different NaF Concentrations

Sun

et al. 2021

Materials

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Newly developed Zn-Mn-Mg alloys can be invoked as biomedical materials because of their excellent mechanical properties. However, the corrosion behavior of Zn-Mn-Mg alloys was still lacking in research. It had grown to be a hot research topic to improve the corrosion behavior of Zn alloys by surface treatment to meet the application of degradable Zn alloys in biomedical applications. Micro arc oxidation (MAO) is a simple and effective method to improve the corrosion behavior of the alloy. MAO coatings were successfully prepared on the surface of Zn-Mn-Mg alloys by MAO in silicate-based solutions with different NaF concentrations. The microstructure and phase composition of MAO coatings prepared on Zn-Mn-Mg alloys with different NaF concentrations in the electrolyte was examined by a scanning electron microscope and X-ray diffraction. The results showed that the MAO coatings are porous and mainly composed of ZnO. With the increasing NaF concentration in the electrolyte, the average thickness increases. The distribution of the micro/nanopores was uniform, and the pore size ranged from the submicron scale to several micrometers after MAO treatment in the electrolyte containing different concentrations of NaF. Potential dynamic polarization curves and electrochemical impedance spectroscopy were employed to assess the corrosion behavior of MAO coatings in Hank’s solution. The highest corrosion rate can be achieved after MAO treatment, with an electrolyte concentration of 1.5 g/L NaF in Hank’s solution. These results indicated that MAO coating can accelerate the corrosion resistance of a Zn-Mn-Mg alloy.

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Bioactive Coatings Formed on Titanium by Plasma Electrolytic Oxidation: Composition and Properties

Cited by 43 publications

References 65 publications

Wearproof Composite Coatings on Ti

Wearproof Composite Coatings on Ti

Investigation of Biocompatible PEO Coating Growth on cp-Ti with In Situ Spectroscopic Methods

Surface Treatment of Zn-Mn-Mg Alloys by Micro-Arc Oxidation in Silicate-Based Solutions with Different NaF Concentrations

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