Coating technology has crucial applications in the aerospace field, as follows:
Thermal barrier coating
Working principle: Thermal barrier coatings are usually composed of materials with low thermal conductivity such as ceramics. Their main function is to form a thermal insulation layer on the surface of high-temperature components, which can effectively reduce the temperature of the component substrate, allowing the substrate material to maintain good mechanical properties in high-temperature environments, avoiding problems such as deformation and strength reduction caused by high temperatures.
Application components: Widely used in aviation engines, such as the combustion chamber, turbine blades, and other parts of the engine. The high-temperature gas generated by combustion in the combustion chamber can reach temperatures of thousands of degrees Celsius, and thermal barrier coatings can enable the combustion chamber wall to function normally in such extreme high-temperature environments; When turbine blades operate at high speeds and come into contact with high-temperature gas, thermal barrier coatings help maintain the appropriate operating temperature of the blades, extend their service life, and ensure reliable engine operation.
Anti oxidation coating
Principle of action: Aerospace components are highly susceptible to chemical reactions with oxygen during flight, especially in high altitudes at high speeds and in high-temperature environments of engines. Anti oxidation coatings can form a dense protective film on the surface of the components, preventing oxygen from contacting the substrate material, thereby delaying or preventing the substrate material from being oxidized and maintaining the performance and structural integrity of the components.
Application components: such as rocket engine nozzles and high-temperature alloy components for aircraft engines require this coating. Rocket engine nozzles not only have to withstand high temperatures during operation, but also face oxygen rich combustion environments. Anti oxidation coatings can ensure that nozzle materials are not rapidly oxidized and corroded; High temperature alloy components in aircraft engines also rely on anti-oxidation coatings to resist oxidation under long-term high-temperature working environments.
Wear resistant coating
Working principle: In aerospace equipment, there is relative motion and friction between many components. Wear resistant coatings can improve the hardness and wear resistance of component surfaces, reduce wear caused by friction, lower the risk of component damage due to wear, and ensure the reliability and service life of the equipment.
Application components: such as the surface of aircraft landing gear, some transmission components of aircraft engines, etc. The landing gear of an aircraft must withstand tremendous impact forces and friction with the runway during takeoff and landing, and wear-resistant coatings can enhance the wear resistance of the landing gear; The engine transmission components are in a state of high-speed operation and mutual friction for a long time, and wear-resistant coatings can make them work better.
Anti corrosion coating
Working principle: Aerospace equipment may come into contact with various corrosive media in different usage environments, such as salt in marine environments, water vapor in the atmosphere, etc. Anti corrosion coatings can isolate these corrosive substances from the substrate material and protect the substrate from corrosion damage.
Application components: External structures such as aircraft fuselage and wings, as well as the outer shell of spacecraft, are all used. Aircraft will experience different climatic conditions during flight, and anti-corrosion coatings can prevent corrosion of the fuselage and other parts, maintaining the structural strength and appearance of the aircraft; Spacecraft face various complex corrosion factors in the space environment, as well as during launch and recovery stages, and anti-corrosion coatings are indispensable.
Absorbing coating
Working principle: It has the ability to absorb and attenuate electromagnetic waves. In the field of military aerospace, it can reduce the radar reflection cross-sectional area of aircraft, making them have better stealth performance and less likely to be detected by enemy radar.
Application components: mainly used on the surface of combat aircraft such as fighter jets and stealth bombers. By coating with absorbing coatings, the stealth and breakthrough capabilities of the aircraft on the battlefield are improved, enhancing military combat effectiveness.
In summary, coating technology plays a crucial role in the aerospace industry by ensuring the performance of various components in extreme environments, improving equipment reliability, and endowing aircraft with special functions.

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