Abstract
Hydrophobic and highly hydrophobic zirconia coatings are obtained by air-plasma spraying of powder and suspension materials. The proposed method and the developed equipment make it possible to obtain nanostructured surfaces with water-repellent properties. The high hydrophobicity of the coating is achieved by creating a hierarchical texture of its surface obtained by the combined method of plasma spraying of powder and liquid-phase materials. The developed surface of the coating based on zirconia ZrO2 obtained by the method of sequential plasma spraying of micropowders (with 20–40 µm microparticle sizes) and liquid materials in the form of suspensions (with 50–100 nm nanoparticle sizes) makes it possible to increase the water-wetting angle up to 145 degrees.
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The authors are grateful to E.E. Kornienko for the preparation of cross-sectional cuts of the coatings and their processing on the electron microscope.
This work was supported by the Russian Foundation for Basic Research (Grants Nos. 18-08-01152 and 19-42-540008) and partially by the State Academies of Sciences (within the Program of Fundamental Scientific Research for the years 2013–2020 (Grant AAAA-A17-117030610120-2))
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Gulyaev, I.P., Kuzmin, V.I. & Kovalev, O.B. Highly hydrophobic ceramic coatings produced by plasma spraying of powder materials. Thermophys. Aeromech. 27, 585–594 (2020). https://doi.org/10.1134/S0869864320040113
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DOI: https://doi.org/10.1134/S0869864320040113