Abstract
Hydrophobic coatings based on organic or ceramic materials usually suffer from low wear resistance and poor thermal stability, which limit their practical applications. Here we report a robust, hydrophobic CeO2/NiCoCrAlY composite coating prepared by air plasma spraying (APS), which shows superior wear resistance, excellent high-temperature stability and high bonding strength with the substrate. The coating can maintain its hydrophobicity after abrasion under 10 kPa over a 4 m distance, or after annealing at 773 K for 8 h. It also presents good corrosion resistance to protect the metallic substrate under corrosive working conditions. The CeO2/NiCoCrAlY composite coating provides a reliable and effective route to fabricate hydrophobic surfaces which may have potential applications in harsh environments.
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