Effect of microstructure and environmental conditions on the dielectric properties of plasma sprayed Al2O3 insulating coatings

Han, Botao; Li, Ning; Che, Yanhao; Wang, Jiqiang; Xiong, Tianying; Cui, Xinyu

doi:10.1016/j.ceramint.2023.10.267

Ceramics International

2024

DOI: 10.1016/j.ceramint.2023.10.267

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Effect of microstructure and environmental conditions on the dielectric properties of plasma sprayed Al2O3 insulating coatings

Botao Han,

Ning Li,

Yanhao Che

et al.

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Cited by 2 publications

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Supersonic plasma-sprayed TiO2 coating: Performance optimization based on response surface methodology and tribological properties

Han,

Wu,

Chen

et al. 2024

Ceramics International

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Supersonic plasma-sprayed TiO2 coating: Performance optimization based on response surface methodology and tribological properties

Han,

Wu,

Chen

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Effect of powder morphology on the structure and properties of Al2O3 based coatings obtained by detonation spraying

V.V.,

S.V.,

M.V.

et al. 2024

Construction Materials and Products

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Aluminum oxide (Al2O3) remains a crucial material in the field of engineering ceramics, particularly in industrial applications. Notably, its transitional phases, in addition to the α-phase, demonstrate good properties. In this article the structure and properties of coatings obtained by detonation spraying from aluminum oxide powder with different production methods (fragmentation and spherical particle shape) and crystalline modification (α-Al2O3 and γ-Al2O3) but with similar average particle size were studied. The goal of the study was to investigate the influence of the morphology and phase composition of the powder on such properties of the coatings as microstructure, porosity, roughness and hardness. The results of the study showed that agglomerated spherical powder leads to low porosity of the coatings, while crushed fragmentation particles provide dense layers. In addition, the coating obtained using fragmentation powder showed higher hardness, and the surface had twice the roughness, compared to the coating applied using spheroidal powder. These results confirm the effect of the morphology of the original powder on the final properties and efficiency of the coatings. The study showed that the detonation spraying method allows for the efficient application of coatings from two types of Al2O3 powders with different morphology (spherical and fragmentation) and phase composition (γ-Al2O3and α-Al2O3) but with similar particle sizes.

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Effect of microstructure and environmental conditions on the dielectric properties of plasma sprayed Al2O3 insulating coatings

Cited by 2 publications

References 34 publications

Supersonic plasma-sprayed TiO2 coating: Performance optimization based on response surface methodology and tribological properties

Supersonic plasma-sprayed TiO2 coating: Performance optimization based on response surface methodology and tribological properties

Effect of powder morphology on the structure and properties of Al2O3 based coatings obtained by detonation spraying

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