Black Gold Carbon Fiber - Absorbing Material

Black gold "carbon fiber, with its" outer softness and inner rigidity ", not only possesses the essential characteristics of carbon materials, but also combines the softness and processability of textile fibers, making it a new generation of high-performance reinforcing fibers. Carbon fiber, which is several times thinner than a human hair, can be combined with resin, carbon, ceramics, metal and other substrates through special composite molding processes to obtain high-performance carbon fiber composite materials. These materials can be widely used in many fields such as aviation, aerospace, energy, transportation, military equipment, etc. They are important materials for national defense, military industry and civilian production and life.

                     

       Carbon fiber composite materialIt has not only become an indispensable basic material to achieve high stealth performance, but also an important symbol to measure the advanced performance of weapons and equipment systems. For example, due to the higher proportion of carbon fiber composite materials used in aircraft such as X-47B, Global Hawk, Global Observer, and Zephyr, new breakthroughs have been achieved in their payload, endurance, and survivability.

The biggest feature of the current F-22 fighter jet is its excellent stealth performance, which is closely related to its extensive use of carbon fiber composite materials. In addition, F-117A fighter jets, B-2 stealth bombers, and other aircraft have also adopted itCarbon fiber absorbing materialThe hull of the Swedish "Visby" class patrol ships is made of fully composite materials, which gives them advanced combat capabilities such as high stealth, high maneuverability, and long lifespan.

 

The factor that reflects the absorption invisibility of carbon fiber is that the fiber cross-section of carbon fiber is generally circular. If we want to improve the absorption, we can now change the shape of the nozzle hole. When producing carbon fibers, we can spray y-shaped or o-shaped filaments with a cross-section for processing. In this way, electromagnetic waves are repeatedly refracted and reflected in the small fiber space, thereby achieving the effect of absorbing waves. I am here to give examples of missiles. To illustrate. Because during the flight of an aircraft, the area of the front fuselage needs to be calculated for missiles, aircraft wings, and other areas. Its compression resistance is good, and the engine generates a large amount of heat. The external temperature is low. In order to avoid defects caused by different linear thermal expansion rates, carbon fiber modification is a necessary means. And the aircraft throat lining must have good erosion resistance and absorption. The difference between missiles is that their ablation rate needs to be measured because missiles fly at a fast speed and generate a lot of heat through friction with air, so their ablation rate needs to be calculated. Carbon fiber composite materials are difficult to remain unoxidized for a long time under high temperature and high shear stress conditions. The most widely used carbon fiber composite material you mentioned is carbon carbon composite material. Matrix modification is very important, and carbon fiber materials are resistant to high temperatures in anaerobic environments, while they are easily oxidized in aerobic environments. For specific modification methods, please refer to the literature. Introducing oxides of refractory metals (with a thermal expansion rate similar to that of carbon fiber composites) is usually limited to hafnium tantalum zirconium.