Carbon fiber (CF) is a new type of fiber material with a carbon content of over 95% and high strength and modulus. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the fiber axis direction, and subjecting them to carbonization and graphitization treatment. Carbon fiber is “soft on the outside and rigid on the inside”, lighter in weight than aluminum metal, but stronger than steel, and has the characteristics of corrosion resistance and high modulus. It is an important material in national defense, military industry, and civilian use. It not only possesses the inherent properties of carbon materials, but also has the flexibility and processability of textile fibers, making it a new generation of reinforcing fibers.
Carbon fiber has many excellent properties, such as high axial strength and modulus, low density, high specific performance, no creep, high temperature resistance in non oxidizing environments, good fatigue resistance, specific heat and conductivity between non-metallic and metallic materials, low thermal expansion coefficient and anisotropy, good corrosion resistance, and good X-ray transparency. Good electrical and thermal conductivity, good electromagnetic shielding, etc. Compared to traditional glass fiber, carbon fiber has a Young’s modulus that is more than three times higher; Compared with Kevlar fiber, its Young’s modulus is about twice as high, and it is insoluble and non swollen in organic solvents, acids, and alkalis, with outstanding corrosion resistance.
Application field
Carbon fiber is an important strategic material for the development of national defense, military industry, and national economy. It is a technology intensive key material. With the academic research from short fiber carbon fiber to long fiber carbon fiber, the technology and products of using carbon fiber to make heating materials have gradually become popular. Against the backdrop of rapid industrialization in today’s world, the use of carbon fiber is becoming increasingly diversified. China has already used long fibers as a type of high-performance fiber. In situations where high temperature and physical stability are required, carbon fiber composite materials have irreplaceable advantages. The higher the specific strength of the material, the smaller the self weight of the component, and the higher the specific modulus, the greater the stiffness of the component. It is precisely because of its excellent performance that carbon fiber has broad application prospects in both national defense and civilian fields.
