Thermal-spray deposition of enamel on aluminium alloys

Bao, Y.; Gawne, D. T.; Gao, Jiantou; Zhang, Tao; Cuenca, Beatriz Diaz; Alberdi, Alberto

doi:10.1016/j.surfcoat.2013.04.065

Cited by 23 publications

(8 citation statements)

References 13 publications

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“…In addition, macroscopic elemental differences caused by the cyclic thermal tests were observed; a distinct, macroscopic elemental boundary between the Y, Al, and Mg atoms was seen. According to previous reports, intermetallic compounds of Al and Mg atoms were formed at the interlayer of the enamel film on aluminum‐magnesium substrates by pre‐heating at 410°C . The existence of such compounds results in low adhesion.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Komatsu

Costa

Ikeda

et al. 2018

Int J Applied Ceramic Tech

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Y2O3 films were synthesized on an aluminum alloy (A5052) substrate directly using a flame‐spray apparatus with a H2‐O2 flame. The Y2O3/A5052 joining was also annealed under atmospheric conditions. Although the joining was annealed close to the melting point of the A5052 substrate, the joining showed strong adhesion without delaminations. The resultant Y2O3 coating exhibits a strong adhesion with the aluminum alloy substrate. Elemental diffusion in the joining was not observed from cross‐sectional EDX analysis. Directly ceramic film deposition method by a reactive spraying process was proposed.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Komatsu

Costa

Ikeda

et al. 2018

Int J Applied Ceramic Tech

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“…Also, the deposit was considered as an elastic solid and stress relaxation induced by continuous deposition was not considered in the calculation. In fact, the temperature of the deposit recorded (Figure 1) was above the glass transition temperature and as an result, some stress relaxation could take place [5,6]. Nevertheless, Figure 2 shows that the thermal stress is high at the beginning (when the droplets first strike the steel substrate) and then gradually decreases with increasing deposition time during which the deposit builds up and the coating-substrate interface temperature rises.…”

Section: Stress Analysis and Splat Morphologymentioning

confidence: 95%

“…This enables the glass particles to be fused in the jet, while the metal substrate is kept at a relatively low temperature. It is a one-stage process, no furnace is required and therefore, in principle, there is no size limit on the substrate [4][5][6][7][8]. In addition, removing the need for a furnace provides the possibility of on-site enamelling and repair.…”

Section: Introductionmentioning

confidence: 99%

Microporosity and delamination mechanisms in thermally sprayed borosilicate glass coatings

Gao

Bao

Gawne

2016

Surface and Coatings Technology

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Conventional enamelling requires both the feedstock powder and the substrate component to be heated one or more times in a furnace at 800 -900 o C. The process can degrade the substrate and limit the size of the component to the furnace dimensions, which are serious restrictions on the technology. This study concerns the use of combustion-flame spraying as an alternative technique for enamelling. In this process, the heat source (the flame) is separated from the substrate, which enables much lower substrate temperatures and avoids thermal damage. It also removes the need for furnace treatment and opens up the possibility of on-site enamelling and repair. However, experimental trials showed that thick flame-spray coatings delaminated during cooling and had high microporosities due to quenching stresses at the glass-steel interface and inadequate splat flow of small feedstock particles. The research shows that these adverse mechanisms could be overcome by pre-heating the substrate surface to the dilatometric softening temperature and removing fines from the feedstock powder. The control of these two parameters was found to double the adhesion strength, provide coatings of very similar hardness and fracture toughness to conventional enamel as well as deposit coatings of over 1 mm in thickness for heavy-duty corrosion protection. Thermal spraying is well established for ceramic and metal coatings but the fundamentally different structure of glasses requires a different approach. An advantage of combustion flame spraying shown up by this research is that the high energy of the flame accelerates the particles to a high velocity and the resulting impact forces promote the flow of the glass. As a result, lower substrate temperatures may be used with reduced risk of degradation or higher viscosity glasses may be 3 deposited with enhanced properties. The influence of the type of thermal-spray technique on coating quality is also discussed.

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“…Aluminium alloys are preferred due to their high strength to weight ratio, abundance in nature and corrosion resistance properties. The low density, high specific strength, ductility and thermal conductivity of aluminium alloys have provided many applications, particularly in the aerospace and automotive sectors [5][6]. However, their uses are limited due to low wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Aluminium AA7075 Reinforced by Zinc Metal Matrix Composites and Their Wear Behaviour Analysis

Manandhar¹,

Ravindran²

2018

Metallofiz. Noveishie Tekhnol.

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In this study, we report effects of zinc on casted aluminium 7075 by using of stir casted method. The volume fraction of composites is prepared by density method. Stir casted composites are fabricated in different volume-fraction levels. Microstructure analysis of alloy and nanocomposites are performed by using SEM. Dry sliding wear is measured on pin-on-disc testing apparatus at various testing conditions for alloy and nanocomposite materials. As shown with the obtained results, the wear resistance increases with increasing the wt.% of reinforcing zinc nanoparticles. The different volume fractions of fabricated composites are shown, which leads to decreasing the wear rate from 40% to 60%. The nanoparticles' sizes, microstructure, and wear rate are approximated from high-resolution diffraction analysis.Keywords: AA7075-T6 aluminium alloy, reinforcing zinc nanoparticles, stir casting, wear rate, SEM.Дана робота стосується дослідження впливу цинку на литий алюміній 7075 при використанні методи лиття з перемішуванням. Об'ємну частку композитів підготовлено методою ущільнення. Перемішані литі компо-зити виготовлено за різних рівнів об'ємної частки допанту. Мікрострук-турну аналізу стопів і нанокомпозитів виконано за допомогою СЕМ. Зно-шування сухого ковзання для стопів і нанокомпозитних матеріялів ви-значали на штифт-диск-апараті за різних умов випробувань. Результати досліджень свідчать, що опір зношуванню зростає при збільшені мас.% Ключові слова: алюмінійовий стоп АА7075-Т6, зміцнювальні наночасти-нки цинку, лиття з перемішуванням, швидкість зношування, СЕМ.Данная работа посвящена исследованию влияния цинка на литой алюми-ний 7075 при использовании метода литья с перемешиванием. Объёмная доля композитов подготовлена методом уплотнения. Перемешанные ли-тые композиты изготовлены при различных уровнях объёмной доли до-панта. Микроструктурный анализ сплавов и нанокомпозитов выполнен с помощью СЭМ. Износ из-за сухого скольжения для сплавов и нанокомпо-зитных материалов определяли на штифт-диск-аппарате при различных условиях испытаний. Результаты исследований свидетельствуют, что со-противление износу растёт при увеличении масс.% упрочняющих нано-частиц цинка. Наблюдалась различная объёмная доля изготовленных композитов, что приводило к уменьшению коэффициента износа с 40% до 60%. Размеры наночастиц, микроструктура и скорость износа согласуют-ся с данными высокоразрешающего дифракционного анализа.Ключевые слова: алюминиевый сплав АА7075-Т6, упрочняющие наноча-стицы цинка, литьё с перемешиванием, скорость износа, СЭМ.

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Thermal-spray deposition of enamel on aluminium alloys

Cited by 23 publications

References 13 publications

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Microporosity and delamination mechanisms in thermally sprayed borosilicate glass coatings

Fabrication of Aluminium AA7075 Reinforced by Zinc Metal Matrix Composites and Their Wear Behaviour Analysis

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Thermal-spray deposition of enamel on aluminium alloys

Cited by 23 publications

References 13 publications

Synthesis of Y2O3 films on an aluminum alloy substrate using flame‐spray apparatus with a H2‐O2 flame

Synthesis of Y2O3 films on an aluminum alloy substrate using flame‐spray apparatus with a H2‐O2 flame

Microporosity and delamination mechanisms in thermally sprayed borosilicate glass coatings

Fabrication of Aluminium AA7075 Reinforced by Zinc Metal Matrix Composites and Their Wear Behaviour Analysis

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Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame