Production of Phosphorescent Coatings on 6082 Aluminum Using Sr0.95Eu0.02Dy0.03Al2O4-δ Powder and Plasma Electrolytic Oxidation

Auzins, Krisjanis; Zolotarjovs, Aleksejs; Bite, Ivita; Laganovska, Katrīna; Vitola, Virgīnija; Šmits, Krišjānis; Millers, D.

doi:10.3390/coatings9120865

Cited by 7 publications

(7 citation statements)

References 29 publications

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“…Other work attempts to use surface structuring processes at the micro or even manometric scale to produce hydrophobic surfaces [13]. More original still, additives are sometimes used in the electrolyte to induce phosphorescence [14].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…The persistent luminescence properties of Eu and Dy-doped strontium aluminate luminophores include a long fading time, unsurpassed intensity, and good chemical stability [ 1 , 2 ]. The already wide field of possible applications of PeL materials is currently being supplemented by ongoing research work on embedding the material in different mediums, such as cloth, polymers, and glass systems [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Sol–Gel Synthesis of Translucent and Persistent Luminescent SiO2@ SrAl2O4 Eu, Dy, B Materials

Leimane,

Krizmane,

Bite

et al. 2023

Materials

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This publication offers an economically promising method of persistent luminescent silicate glass synthesis that does not involve high temperatures or ready-made (separately synthesized) PeL particles. In this study, we demonstrate the formation of SrAl2O4 doped with Eu, Dy, and B in a SiO2 glass structure using the one-pot low-temperature sol–gel synthesis method. By varying the synthesis conditions, we can use water-soluble precursors (e.g., nitrates) and a dilute aqueous solution of rare-earth (RE) nitrates as starting materials for SrAl2O4 synthesis, which can be formed during the sol–gel process at relatively low sintering temperatures (600 °C). As a result, translucent, persistently luminescent glass is obtained. The glass shows the typical Eu2+ luminescence and the characteristic afterglow. The afterglow duration is about 20 s. It is concluded that the slow drying procedure (2 weeks) is optimal for these samples to sufficiently get rid of the excess water (mainlyOH groups) and solvent molecules that can influence the strontium aluminate luminescence properties and have a pernicious effect on the afterglow. It can also be concluded that boron is playing a crucial role in the formation of trapping centers needed for PeL processes in the PeL silicate glass.

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“…The fashion-jewellery industry makes extensive use of scarcely available metals, which in most cases come from ore extraction. Nevertheless, alternatives do exist, despite the fact that, from a technological point of view, a lot of work has yet to be done to ensure at least the same performance of the materials nowadays being used [7][8][9]. Since fashion-jewellery market players are constantly seeking new, viable ways to render their whole value chain more sustainable, they are constantly looking at making use of green and eco-compatible base materials, yet ensuring economically feasible processes [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

Comparini

Pace²,

Giurlani

et al. 2022

Coatings

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Aluminium and its alloys are interesting for many applications because they are very light, cheap, and unlimitedly recyclable. Despite being a promising base material for the fashion-jewellery sector, their tendency to form a passivating film makes them difficult to be galvanized, even more when recycled aluminium contains impurities of refractory elements. Indeed, the most common processes for galvanising aluminium are often expensive and not environmentally sustainable because they involve the use of cyanides. In this work we focussed on the pre-treatments and electroplating on Al6082 aluminium which is largely used for fashion-jewellery applications. The objective of the present study was to assess whether Al6082 series aluminium is suitable a as base material for the fashion market; therefore, we investigated the effectiveness of plating pre-treatments and the success of electroless zinc deposition using an innovative alkaline cyanide-free zincate solution. After the electroplating, adhesion between the deposited layers was evaluated both with cross-sectional scanning electron microscope (SEM) analysis as well as with an adhesion evaluation test (ISO2819:2018): no detachments confirmed the positive test outcomes and thereby highlighted that Al6082 can be exploited as base material in the fashion-jewellery market.

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Production of Phosphorescent Coatings on 6082 Aluminum Using Sr0.95Eu0.02Dy0.03Al2O4-δ Powder and Plasma Electrolytic Oxidation

Cited by 7 publications

References 29 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

Sol–Gel Synthesis of Translucent and Persistent Luminescent SiO2@ SrAl2O4 Eu, Dy, B Materials

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

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