Influence of different plasma spraying methods on the physical properties of YSZ coatings

Kavaliauskas, Žydrūnas; Kėželis, Romualdas; Milieška, Mindaugas; Marcinauskas, Liutauras; Valincius, Vitas; Aikas, Mindaugas; Uscila, Rolandas; Baltušnikas, Arūnas; Žunda, Audrius

doi:10.1016/j.surfin.2021.101120

Cited by 7 publications

(6 citation statements)

References 28 publications

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“…The hardness of the conventional YSZ coating studied here falls within the lower part of this range. The hardness of the conventional YSZ and YSZ–Al 2 O 3 nanocomposite coatings studied here is comparable with values reported for such coatings deposited using APS or EPD techniques 41,42 . However, the hardness values obtained in this study are somewhat lower compared to the values achieved by us for YSZ and YSZ–Al 2 O 3 micro‐composite coatings deposited using the APS technique in another study (not published yet).…”

Section: Resultssupporting

confidence: 83%

“…The hardness of the conventional YSZ and YSZ-Al 2 O 3 nanocomposite coatings studied here is comparable with values reported for such coatings deposited using APS or EPD techniques. 41,42 However, the hardness values obtained in this study are somewhat lower compared to the values achieved by us for YSZ and YSZ-Al 2 O 3 microcomposite coatings deposited using the APS technique in another study (not published yet). The lower hardness observed in the present study can be attributed to the lower sintering temperature employed.…”

Section: Phase Compositions Of Coatingscontrasting

confidence: 80%

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YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

Noroozpour,

Akbari

2023

Int J Applied Ceramic Tech

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This paper presents the development of yttria‐stabilized zirconia–alumina (YSZ–Al2O3) nanocomposite coatings deposited on Inconel 738LC superalloy substrates using the electrophoretic deposition technique. To prepare stable suspensions of YSZ and Al2O3 nanoparticles, a mixture of 75 mL acetone and 25 mL ethanol was used as a medium with .4 g/L iodine as a dispersant. The effects of Al2O3 concentration on suspension stability, electrical conductivity, and pH were studied in detail to optimize the suspension chemistry. The deposition kinetics were systematically investigated as a function of suspension concentration, deposition voltage, deposition time, and iodine concentration () to optimize the process parameters. The as‐dried coatings deposited at Vd = 10 V for 90 s were uniform, crack‐free, and sintered at 1150°C for 4 h. The microstructure, phase composition, hardness, and adhesion strength of the coatings were analyzed using scanning electron microscopy, X‐ray diffraction, Vickers microhardness measurements, and conducting shear loading tests, respectively. The results showed that adding Al2O3 to YSZ reduces porosity, crack density, and sintering temperature while stabilizing the tetragonal phase and retarding the martensitic transformation and crack formation. Among the studied coatings, the YSZ–20 wt.% Al2O3 nanocomposite coating deposited at Vd = 10 V for 90 s exhibited the most improved microstructural features, hardness, and adhesion strength.

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Section: Resultssupporting

confidence: 83%

Section: Phase Compositions Of Coatingscontrasting

confidence: 80%

YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

Noroozpour,

Akbari

2023

Int J Applied Ceramic Tech

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“…APS can replace large shielding components that are difficult to produce using conventional sintering ceramics due to its high economy, flexibility, wide applicability, high degree of automation, and high suitability to oxide ceramics because large-scale ceramics are technically difficult to produce and their costs are often high [3]. The common corrosion-resistant coatings prepared by APS are aluminum-based ceramic coatings and yttrium-based ceramic coatings [4], and yttrium-based ceramic coatings have good porosity and corrosion resistance due to their special porous structure [5]. However, there are still few existing studies on the optimization of APS process parameters, especially the optimization of individual parameter combinations and their influence on coating performance, which…”

Section: Introductionmentioning

confidence: 99%

Study on the Microstructure, Corrosion Resistance and Dielectric Properties of Atmospheric Plasma-Sprayed Y2O3 Ceramic Coatings

Sun,

Zhong,

Qiu

et al. 2024

Coatings

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Atmospheric plasma spraying (APS) is one of the most efficient processes for the preparation of yttrium oxide (Y2O3) ceramic coatings. Changing the spraying process parameters can significantly improve the microstructure and enhance the coating properties. In this study, the combination of plasma-spraying process parameters (current, spraying distance, and argon (Ar) flow) was varied by Response Surface Methodology (RSM) with the help of Minitab 19 software. Applied to the design of experiments, improvement of errors, and prediction of microstructure property results, the optimization and validation of experimental parameters for attaining the desired microstructure of Y2O3 coatings, especially porosity, was achieved. Process parameters were optimized by RSM: current 613.64 A, Ar flow rate 46.92 L/min, spray distance 15.38 cm, and optimum porosity 1.8% after optimization. Electrochemical corrosion experiments and breakdown voltage experiments revealed that the corrosion resistance and dielectric properties increased significantly as the porosity of the coatings decreased. Therefore, by optimizing the plasma-spraying process parameters, the porosity of the coatings can be significantly reduced and the corrosion resistance and dielectric properties of Y2O3 coatings can be effectively improved.

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“…Further, the YSZ coating performance on AM-built and reference substrates have been compared for different feedstock powder morphologies, bond coat deposition methods, and plasma spray gun systems with radial and axial feed capability. There are several studies on the influence of powder feedstock, bond coat and spray gun systems on YSZ coating performance on forged (reference) substrates [17][18][19]. However, to the best of the authors' knowledge such an investigation on APS coatings on AM-built substrates along a comparison with reference substrates has never been attempted.…”

Section: Introductionmentioning

confidence: 99%

Performance of Atmospheric Plasma-Sprayed Thermal Barrier Coatings on Additively Manufactured Super Alloy Substrates

Bellippady,

Björklund,

et al. 2024

Coatings

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This work represents a preliminary study of atmospheric plasma-sprayed (APS) Yttria-Stabilized Zirconia (YSZ)-based thermal barrier coatings (TBCs) deposited on forged and additive manufactured (AM) HAYNES®282® (H282) superalloy substrates. The effect of different feedstock morphologies and spray gun designs with radial and axial injection on APS-deposited YSZ layer characteristics such as microstructure, porosity content, roughness, etc., has been investigated. The performance of TBCs in terms of thermal cycling fatigue (TCF) lifetime and erosion behaviour were also comprehensively investigated. In view of the high surface roughness of as-built AM surfaces compared to forged substrates, two different types of NiCoCrAlY bond coats were examined: one involved high-velocity air fuel (HVAF) spraying of a finer powder, and the other involved APS deposition of a coarser feedstock. Despite the process and feedstock differences, the above two routes yielded comparable bond coat surface roughness on both types of substrates. Variation in porosity level in the APS topcoat was observed when deposited using different YSZ feedstock powders employing axial or radial injection. However, the resultant TBCs on AM-derived substrates were observed to possess similar microstructures and functional properties as TBCs deposited on reference (forged) substrates for any given YSZ deposition process and feedstock.

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Influence of different plasma spraying methods on the physical properties of YSZ coatings

Cited by 7 publications

References 28 publications

YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

Study on the Microstructure, Corrosion Resistance and Dielectric Properties of Atmospheric Plasma-Sprayed Y2O3 Ceramic Coatings

Performance of Atmospheric Plasma-Sprayed Thermal Barrier Coatings on Additively Manufactured Super Alloy Substrates

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Influence of different plasma spraying methods on the physical properties of YSZ coatings

Cited by 7 publications

References 28 publications

YSZ–Al2O3 thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

YSZ–Al2O3 thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

Study on the Microstructure, Corrosion Resistance and Dielectric Properties of Atmospheric Plasma-Sprayed Y2O3 Ceramic Coatings

Performance of Atmospheric Plasma-Sprayed Thermal Barrier Coatings on Additively Manufactured Super Alloy Substrates

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Product

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About

YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization

YSZ–Al₂O₃ thermal barrier nanocomposites coatings: Electrophoretic deposition and characterization