Improving the stability of the coating properties for group plasma electrolytic oxidation

Apelfeld, A. V.; Grigoriev, S. N.; Крит, Б. Л.; Lyudin, V. B.; Суминов, И. В.

doi:10.1016/j.mfglet.2022.08.005

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Materials 2023, 15, x FOR PEER REVIEW 2 of 18 cial that the surface treatment procedure provides coatings of the required quality on devices that typically have complicated shapes, with threaded connections and holes. Moreover, industrial production requires simultaneous PEO treatment of several devices in one batch; recent research shows the necessity of developing a special approach for group plasma electrolytic oxidation [15]. Therefore, it is important to understand how the PEO process mechanism and regimes of the treatment should be amended to make a step from a simple-shaped sample to a load of real implants.…”

Section: D1 D2 D3 D4mentioning

confidence: 99%

“…For medical implants, it is crucial that the surface treatment procedure provides coatings of the required quality on devices that typically have complicated shapes, with threaded connections and holes. Moreover, industrial production requires simultaneous PEO treatment of several devices in one batch; recent research shows the necessity of developing a special approach for group plasma electrolytic oxidation [15].…”

Section: Introductionmentioning

confidence: 99%

“…This gap was addressed with an example of the investigation of PEO coating properties on a zirconium alloy as a function of various current densities obtained at different spatial arrangements of the samples in one batch. Compared to other works [15][16][17][18], this study jointly considers both mathematical models of the electric field and the kinetics of the electrochemical reactions underlying the PEO coating process of the multiple workpieces. The PEO coating thickness, morphology, phase composition, corrosion resistance and wear resistance were evaluated as the key properties, and new correlations between the process parameters were established.…”

Section: Introductionmentioning

confidence: 99%

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Influence of PEO Electrolyzer Geometry on Current Density Distribution and Resultant Coating Properties on Zr-1Nb Alloy

Aubakirova¹,

Гундеров

Фаррахов³

et al. 2023

Materials

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This paper is devoted to the study of the current density distribution effect on plasma electrolytic oxidation process and resultant coatings on a Zr-1Nb alloy. The influence of the distance between the plates simultaneously placed into an electrolyzer was evaluated to assess the throwing power of the PEO process. The current density on the facing surfaces of the plates decreases when the distance between them shrinks. This current density has a notable impact on the resultant PEO coating in terms of the surface morphology parameters and electrochemically evaluated corrosion resistance. The influence of this effect is low on the stages of anodizing and spark discharges (60–120 s of the PEO), and significantly increases on the stage of microarc discharges (120–360 s of the PEO). The coating obtained with a smaller distance between the plates, while having the same coating thickness as the others, exhibits higher wear resistance. New correlations between the current density, diffusion coefficient, time constant of nucleation and the coating thickness in the middle of the facing samples were established; in addition, a correlation of the coating morphology in this area with the roughness parameters RPc, RSm was shown. This study contributes to the development of optimized PEO processes for the simultaneously coated several devices of complex shape, e.g., orthopedic implants.

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Section: D1 D2 D3 D4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of PEO Electrolyzer Geometry on Current Density Distribution and Resultant Coating Properties on Zr-1Nb Alloy

Aubakirova¹,

Гундеров

Фаррахов³

et al. 2023

Materials

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“…Plasma electrolytic treatment (e.g., Plasma electrolytic oxidation) [177,302,[353][354][355][356][357][358][359][360] Simple, inexpensive, and environmentally safe method. It allows to apply various (in particular, polymeric) coatings on metal and ceramic substrates with their simultaneous cleaning in order to increase the corrosion resistance of implants.…”

Section: Combined Processing Techniquesmentioning

confidence: 99%

Dental Implants: Modern Materials and Methods of Their Surface Modification

Sotova,

Yanushevich,

Kriheli

et al. 2023

Materials

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The development of dental implantology is based on the detailed study of the interaction of implants with the surrounding tissues and methods of osteogenesis stimulation around implants, which has been confirmed by the increasing number of scientific publications presenting the results of studies related to both the influence of the chemical composition of dental implant material as well as the method of its surface modification on the key operational characteristics of implants. The main materials for dental implant manufacturing are Ti and its alloys, stainless steels, Zr alloys (including ceramics based on ZrO2), and Ta and its alloys, as well as other materials (ceramics based on Al2O3, Si3N4, etc.). The review presents alloy systems recommended for use in clinical practice and describes their physical–mechanical and biochemical properties. However, when getting into the body, the implants are subjected to various kinds of mechanical influences, which are aggravated by the action of an aggressive biological environment (electrolyte with a lot of Cl− and H+); it can lead to the loss of osteointegration and to the appearance of the symptoms of the general intoxication of the organism because of the metal ions released from the implant surface into the biological tissues of the organism. Since the osteointegration and biocompatibility of implants depend primarily on the properties of their surface layer (it is the implant surface that makes contact with the tissues of the body), the surface modification of dental implants plays an important role, and all methods of surface modification can be divided into mechanical, physical, chemical, and biochemical methods (according to the main effect on the surface). This review discusses several techniques for modifying dental implant surfaces and provides evidence for their usefulness.

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“…The MAO coating had better wear resistance with less mass loss rates and lighter wear scar width with the increase in NaAlO 2 concentration. Apelfeld et al [15] prepared to overcoat on a 5A06 aluminum alloy through group plasma electrolytic oxidation (PEO) with silicate-alkaline electrolyte. This was developed from the algorithms for the automatic correction of the PEO mode to increase the PEO coatings' stability when formed during parallel treatment in the same group.…”

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confidence: 99%