Effect of Sealing Treatment on the Dielectric Properties of Plasma-Sprayed Al2O3 Coatings

Wen, Penghui; Wang, Xiao Ming; Tang, Boen; Wang, Dongyun; Wu, Dong Yang; Wang, Linlin

doi:10.1007/s11666-023-01620-3

Cited by 2 publications

(1 citation statement)

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“…Therefore, it could be seen that controlling the porosity and thickness of the coating, i.e., by optimizing the process parameters, is the key to improving the dielectric properties of Al 2 O 3 . Wen et al [10] enhanced the insulation properties of Al 2 O 3 coatings by applying penetrant sealing with silicone resin and epoxy sealant. This treatment markedly decreased the coating's porosity and increased its dielectric strength.…”

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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Section: Introductionmentioning

confidence: 99%