The carbon fiber (carbon fiber, referred to as CF) is a new kind of fiber material with high strength and high modulus fiber with carbon content of more than 95%. It is a flaky graphite, micro crystalline and other organic fibers stacked along the axial direction of the fiber, it is obtained by carbonization and graphitization of micro crystalline graphite material. the quality of the carbon fiber is lighter than aluminum, but the strength is higher than that of steel, and it has the characteristics of corrosion resistance, high modulus, it’s important materials in the national defense and civilian areas . It has not only the intrinsic characteristics of carbon materials, but also the softness and processability of textile fibers. It is a new generation of reinforced fiber.
Carbon fiber has many excellent properties, carbon fiber has axial strength and high modulus, low density, high performance, no creep, non oxidation under the environment of high temperature resistance, good fatigue resistance, between heat and electrical conductivity between the metal and non metal, smaller thermal expansion coefficient and anisotropy, good corrosion resistance, good X Radiability. Good conductivity, thermal conductivity, good electromagnetic shielding, etc.. Compared with the traditional glass fiber, the young's modulus is more than 3 times; compared with Kevlar fiber, the young's modulus is about 2 times , it’s insoluble and non swelling in the organic solvent, acid and alkali , outstanding corrosion resistance.
Carbon fiber is an important strategic material for the development of national defense and national economy, it’s the key technology intensive material , with carbon fiber spun from academic research to long fiber carbon fiber, making use of carbon fiber heating material technology and products has gradually spread. Under the background of high-speed industrialization in the world today, the use of carbon fiber is becoming diversified. Chinese have made use of long fiber as a kind of high performance fiber, in high temperature, high physical stability of the occasion, carbon fiber composite materials have irreplaceable advantages higher than the strength of the material, the component weight smaller, higher than the modulus, the component stiffness is bigger, the carbon fiber is applied in military and civilian fields widely because of the excellent performance.
Carbon fiber material has been widely used in various fields of military and civil industry. From aerospace, aviation, automobiles, electronics, machinery, chemicals, textile and other civilian industries to sports equipment and leisure goods. Carbon fiber reinforced composites can be used in aircraft manufacturing and military field, wind turbine blades and other industrial fields, electromagnetic shielding materials, in addition to electric artificial ligament and other physical substitute materials and for the manufacture of rocket shell, motor boats, industrial robot, automobile plate spring and drive shaft etc.. Sports such as clubs. Carbon fiber is a typical new industrial material in the field of high technology.