Low Drag Coatings for Aircraft Surface

A high-durability super-amphiphobic aircraft anti-icing coating and its preparation method for aircraft surfaces. The coating achieves superior anti-icing performance through a unique preparation process involving in-situ loading of silicon dioxide nanoparticles onto micron attapulgite particles, followed by fluorosilane modification of the surface energy. This enables the coating to maintain its super-hydrophobic properties even after exposure to prolonged environmental conditions, including high-altitude low-temperature and high-humidity environments. The coating exhibits excellent repellency against various surface tension liquids, including water, oil, and lubricants, while maintaining its self-cleaning performance after mechanical wear and chemical corrosion.

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Aerofoil surface technology for reducing heat and drag on aircraft walls through controlled flow dynamics. The surface comprises a porous substrate with micro-scale cavities, where microstructure units are arranged in a three-dimensional staggered pattern. The surface features micro-nano pores that trap flow, creating a trapped vortex that reduces shear stress between incoming flow and the surface. The cooling gas infiltrates through the substrate and microstructure units, forming a thin film that reduces friction between the flow and surface. The surface's microstructure is designed to optimize flow separation and turbulence suppression, enabling both heat reduction and drag reduction at high speeds.

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Aerodynamic drag reduction layout method for low-altitude high-speed flight that enables efficient drag reduction and heat management in the Mach 6 to Mach 8 regime. The method employs a shape transformation approach that adapts the aircraft's aerodynamic configuration to optimize performance in this critical altitude range. By modifying the aircraft's wing and fuselage geometry, the method achieves significant drag reduction while maintaining structural integrity, particularly in the high-speed regime where conventional drag reduction techniques are less effective.

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Organosilicon polymer drag reducing agent coating, slow-release surface preparation method, and application technology for aircraft drag reduction. The coating comprises a three-dimensional polydimethylsiloxane network structure combined with polymer solid particles and silicone oil. The coating is prepared through a specific ratio of components, with a thickness of 3-10 mm during surface leveling. The silicone oil assists polymer dissolution and secretion, forming a silicone slow-release surface. This novel surface preparation method enables the development of drag-reducing coatings with improved performance and reduced production costs compared to conventional polymer-based solutions.

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Organosilicon polymer drag reduction agent coating for aircraft surfaces, featuring a controlled release mechanism that enables efficient drag reduction while minimizing material waste. The coating consists of a polydimethylsiloxane-based polymer matrix, a curing agent, a silicone oil component, a high polymer solid particle, and a diluent. The precise formulation of the components allows for precise control over the release rate, enabling optimized drag reduction performance while maintaining surface integrity. The coating can be applied to aircraft surfaces using a conventional bonding process, eliminating the need for specialized equipment and reducing installation complexity.

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A micro-nano drag reduction structure for high-altitude and high-speed aircraft applications. The structure comprises elongated, isosceles triangular grooves on the aircraft's surface, with the groove's base and height ratio between 0.5 and 1. The grooves are positioned perpendicular to the airflow direction, with a divider strip between adjacent grooves. This unique geometry creates a turbulent boundary layer that reduces aerodynamic drag by mitigating the effects of viscous forces near the aircraft surface.

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A lightweight, heat-resistant, and heat-insulating stealth coating comprising a combination of nanostructured fillers and hollow microsphere particles. The coating is prepared through a novel process that integrates these materials into a uniform dispersion through a multi-step dispersion process, followed by controlled drying and brushing. The resulting coating exhibits superior thermal resistance and wave-absorbing properties compared to conventional stealth coatings, with specific performance metrics including density, thermal conductivity, and wave absorption characteristics.

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Polyurethane-based, stress-localized ice-shedding coatings that achieve low ice adhesion while maintaining durability under extreme environmental conditions. The coatings consist of a high-shear modulus polyurethane matrix phase, a low-shear modulus Phase II-A phase comprising thermoplastic elastomer, wax, and high-oleic oil, and a low-shear modulus Phase II-B phase comprising silicone elastomer and silicone oil. The Phase II-A and Phase II-B phases are uniformly distributed within the high-shear modulus matrix phase, creating a stress-localized surface that initially detaches ice from the material before propagating. The coatings exhibit exceptional durability under rain erosion conditions with wind speeds exceeding 172 meters per second.

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Coatings and materials that minimize atomic oxygen (AO) degradation and reduce drag on spacecraft, particularly in harsh environments like low Earth orbit. The coatings achieve this through a unique surface treatment that maintains a smooth oxide layer while preventing oxygen-induced erosion. The coatings are specifically designed to provide atomic oxygen resistance and low drag properties, enabling spacecraft to operate in environments with high atmospheric density and intense radiation.

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A process for achieving three-dimensional diamond-like carbon (DLC) coatings on metal and non-metallic surfaces through plasma-enhanced chemical vapor deposition (PECVD) with enhanced confinement of electrons and ions. The process utilizes a multilayer structure with an additional cathode containing a screen geometry and transparency, employing a gas igniter that maintains stable plasma conditions even at elevated pressures. This innovative approach enables the deposition of DLC coatings with improved mechanical properties, including reduced residual stress and enhanced hydrophobicity, while maintaining the same surface roughness as single-layer coatings.

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Bionic drag-reducing coating for high-speed vehicles that achieves significant drag reduction through a novel surface structure. The coating is prepared by spraying a temperature-sensitive metal powder onto a vehicle surface, where the powder's temperature decreases as it interacts with the surface. This temperature gradient creates a surface tension gradient that drives the formation of a pit-shaped structure on the surface, effectively reducing frictional resistance. The coating's unique micro-scale pit structure enables efficient drag reduction across a wide range of operating conditions.

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Microstructure drag reduction film for unmanned aerial vehicle rotors that enhances aerodynamic performance through precise, sharp grooves. The film features micro-scale, precisely engineered grooves with sharp peaks that maximize drag reduction while minimizing film thickness. The manufacturing process employs a novel extrusion roll forming method that enables precise control over groove dimensions and shape, particularly for achieving optimal peak profiles.

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Multi-layer coating for aircraft components that enhances durability and performance through a barrier layer and laminar flow layer. The coating consists of a barrier layer containing fluoropolyether, silicon rubber, or polyurethane, covering the component surface. The barrier layer protects the component from environmental degradation while the laminar flow layer, comprising sol-gel siloxane, rare-earth oxide, and phosphate, forms a protective layer on top of the barrier layer. This multi-layer configuration provides enhanced mechanical properties and resistance to environmental influences, making it suitable for critical aircraft components.

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A microstructure drag reduction film for rotor wings of unmanned aerial vehicles (UAVs) that enhances aerodynamic efficiency. The film features a unique microstructure with precisely engineered grooves that create sharp peaks, ensuring optimal drag reduction performance. The film's microstructure is fabricated through a novel combination of extrusion roll forming and hot pressing techniques that simultaneously produce the required grooves and precise dimensions. This innovative manufacturing process enables the creation of high-performance drag reduction films on rotor surfaces while maintaining structural integrity and preventing film seams.

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A finishing coating for aircraft outer skins that prevents degradation from environmental factors like UV radiation, rain, and atmospheric pollution. The coating combines a cross-linked HDI trimer with a non-volatile component B, where the trimer has a 100% non-volatile content and the B component is prepared from a balanced mixture of polycaprolactone resin, polycaprolactone triol resin, polycaprolactone alcohol resin, leveling agent, acetylacetonate catalyst, and UV absorber. The coating achieves superior gloss retention and color stability compared to conventional coatings, particularly in the presence of environmental stressors.

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Flow-optimized surface with reduced wear for aerodynamic components. The surface features a coating with a modulus of elasticity between 1.0 and 500.0 MPa and elastic deformability greater than 10%. This coating layer enables the surface to maintain its friction-reducing properties while minimizing wear through its elastic deformation under external forces. The surface is particularly effective for applications where aerodynamic components are exposed to environmental influences such as wind or water flow.

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A method and system to prevent surface contamination of aircraft leading edges during flight by employing a surface coating with Bingham plastic properties. The coating material exhibits yield stress above its yield point, allowing it to resist deformation under normal operating conditions but deform under the stresses generated by surface contaminants. This coating enables the removal of contaminants through controlled deformation, preventing transition from laminar to turbulent flow. The coating can be applied to aircraft leading edges, particularly in regions prone to contamination, and is particularly effective in environments with high surface debris.

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Mixed coating material for aircraft wings that provides high-performance ice control through a unique combination of a room temperature curing resin and particulate fluororesin. The coating system enables efficient ice prevention at the wing's trailing edge, where conventional anti-icing systems often fail. The resin reacts and cures at room temperature, while the fluororesin provides enhanced water repellency through its particulate structure. This innovative combination enables the coating to effectively prevent ice formation on the trailing edge of the wing, even in areas where conventional anti-icing systems cannot reach.

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Nano-coatings for aircraft surfaces that achieve enhanced performance beyond traditional coatings. The coatings combine decorative, corrosion-resistant, self-cleaning, UV-resistant, low-friction, and high-heat resistance properties with extended service life. The coatings achieve these performance enhancements through a two-component nano-formulation that incorporates nanoparticles of specific materials. The formulation enables superior protection against environmental factors while maintaining the aircraft's aerodynamic performance.

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A fluorocarbon coating for aircraft wing skin that enhances performance through advanced chemical bonding while maintaining superior weather resistance, chemical resistance, and high temperature resistance. The coating achieves this through a novel crosslinking mechanism that utilizes fluorine-containing monomers with enhanced chemical stability, rather than traditional crosslinking agents. This approach enables the formation of a robust, high-performance fluorocarbon coating with reduced VOC emissions and improved environmental sustainability compared to conventional fluorocarbon coatings.

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