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Мерцало, І. П.; Yavors’kyi, V. T.; Klapkiv, М. D.; Mardarevych, R. S.

doi:10.1023/a:1026147017445

Cited by 15 publications

(4 citation statements)

References 3 publications

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“…This phenomenon helps the formation of alpha alumina in the coating while maintaining the entire substrate at room temperature. The hardest coatings are [48,49] with the highest proportion of dense layer [50][51][52][53][54] and with the most uniform thickness [52,54] are obtained in this manner. This method of treatment also makes it possible to reduce the roughness [55] as well as the porosity [52,56].…”

Section: Special Case Of the Soft-arc Regimementioning

confidence: 83%

Micro-Arcs Oxidation Layer Formation on Aluminium and Coatings Tribological Properties—A Review

et al. 2023

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This review proposes to carry out a state-of-the-art associated with micro-arc oxidation. Firstly, the different aspects of the growth mechanisms of the oxides are detailed. Then, the formation of micro-arcs and the case of soft-spark treatment are discussed. Then, the electrolytic reactions involved in the layer construction are outlined. We focused on the influence of aluminium alloys on the appearance of the coating and its characteristics before considering the electrolyte formulation. We have concentrated some of our efforts on silicate-based electrolytes, mainly used in research and industry. The importance of electrical parameters in layer formation is detailed later. The main factors studied in the literature are the current source, current density, treatment frequency and duration, and duty cycle. We have also noted the different phase compositions identified in the literature. Finally, since the process is particularly advantageous for protecting the surfaces of aluminium parts against wear, we conclude this review by presenting work on the tribological properties of this coating. In this final section, we highlight the work on the wear-reducing properties and tribological mechanisms identified in the literature. Particular attention is paid to the relationship between the nature of the substrates used, the role of the electrolyte and the counterpart choice on the friction and wear results.

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Section: Special Case Of the Soft-arc Regimementioning

confidence: 83%

Micro-Arcs Oxidation Layer Formation on Aluminium and Coatings Tribological Properties—A Review

et al. 2023

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“…Liquid gallium metal reacts with HCl gas to yield GaCl at 900 1C with a value of DF1 f (free energy of formation) ¼ À3.956 kcal mol À1 [25,26]. Similarly, the reaction of Al with HCl is also thermodynamically feasible at the temperature of 900-927 1C (DF1 f ¼ À103.032 kcal mol À1 for reaction (2) above) [27][28][29].…”

Section: Article In Pressmentioning

confidence: 99%

VLS growth of Si nanocones using Ga and Al catalysts

Zhou

Ekerdt

Shih

2008

Journal of Crystal Growth

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“…The application of plasma electrolytic oxidation (PEO) treatment to aluminum alloys leads to a significant increase of the alloys hardness, as well as providing improved wear and corrosion resistance due to the formation of ceramic-like coatings [8,9,10,11,12], as a result of short-living spark discharges under high voltage conditions in alkaline environmentally friendly electrolytes. The most used electrolytes for PEO treatment of aluminum alloys are composed of mixtures of several components, e.g., sodium silicate (0.5–50 g L −1 ), potassium or sodium hydroxide (1–50 g L −1 ), sodium aluminate (2–20 g L −1 ), sodium or potassium carbonate (up to 500 g L −1 ), sodium fluoride (0.5–20 g L −1 ), and hexametaphosphate (up to 150 g L −1 ) [13].…”

Section: Introductionmentioning

confidence: 99%

The Influence of PSA Pre-Anodization of AA2024 on PEO Coating Formation: Composition, Microstructure, Corrosion, and Wear Behaviors

et al. 2018

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In the frame of the current work, it was shown that plasma electrolytic oxidation (PEO) treatment can be applied on top of phosphoric sulfuric acid (PSA) anodized aluminum alloy AA2024. Being hard and well-adherent to the substrate, PEO layers improve both corrosion and wear resistance of the material. To facilitate PEO formation and achieve a dense layer, the systematic analysis of PEO layer formation on the preliminary PSA anodized layer was performed in this work. The microstructure, morphology, and composition of formed PEO coatings were investigated using scanning electron microscopy (SEM), x-ray diffraction (XRD), and glow-discharge optical emission spectroscopy (GDOES). It was shown that under constant current treatment conditions, the PSA layer survived under the applied voltage of 350 V, whilst 400 V was an intermediate stage; and under 450 V, the PSA layer was fully converted after 5 min of the treatment. The comparison test with PEO formation on the bare material was performed. It was confirmed that during the “sparking” mode (400 V) of PEO formation, the PEO coatings, formed on PSA treated AA2024, were more wear resistant than the same PEO coatings on bare AA2024.

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Untitled

Cited by 15 publications

References 3 publications

Micro-Arcs Oxidation Layer Formation on Aluminium and Coatings Tribological Properties—A Review

Micro-Arcs Oxidation Layer Formation on Aluminium and Coatings Tribological Properties—A Review

VLS growth of Si nanocones using Ga and Al catalysts

The Influence of PSA Pre-Anodization of AA2024 on PEO Coating Formation: Composition, Microstructure, Corrosion, and Wear Behaviors

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