Carbon fiber composite (CFC), also called carbon carbon composite, C/C composite.
Carbon fiber composite materials, mainly composed of carbon elements of a special fiber, its carbon content varies with the grades, generally more than 90%. Carbon fiber has the general characteristics of carbon materials, such as high temperature, abrasion resistance, electricity conductivity, thermal conductivity and corrosion resistance.
Overview / Carbon Fiber Composite
Of all the composites, fiber reinforced materials has been the focus of attention. Since the advent of glass fiber reinforced with glass fiber and organic resin, carbon fiber, ceramic fiber and boron fiber reinforced composites have been successfully developed, the performance has been improved, so that the field of composite materials showing a vitality. Let us look at the unique characteristics of carbon fiber composite materials.
Structure / Carbon Fiber Composites
Mainly composed of carbon elements of a special fiber, the carbon content varies with the grades, generally more than 90%. Carbon fiber has the characteristics of general carbon materials, such as high temperature, abrasion resistance, conductive, thermal conductivity and corrosion resistance, but its different to the general carbon material, its shape has significant anisotropy, soft, can be processed into any size structure. The fabric exhibits high strength along the fiber axis. Carbon fiber has a small specific gravity, so it has a high specific strength. Carbon fiber is made of artificial chemical fiber which has high carbon content and does not melt during heat treatment. It is made by the processes of heat stabilizing oxidation treatment, carbonization treatment and graphitization.
CFCCARBON LTD can produce all types of carbon fiber composite, including 2D, 2.5D, 3D and 4D structures. With CVI/CVD or petro based process.
Advantages / Carbon Fiber Composite
1, high strength (5 times that of steel)
2, excellent heat resistance (can withstand more than 2000 ℃ high temperature)
3, excellent thermal shock resistance
4, low thermal expansion coefficient (deformation is small)
5, heat capacity (energy)
6, small gravity (is 1/5 of steel)
7, excellent anti-corrosion and radiation performance
Applications / carbon fiber composite materials
The main purpose of carbon fiber is to mix together with resin, metal, ceramic and other matrix compound, to produce structural materials. Carbon fiber reinforced epoxy resin composites, has the highest ratio of strength, modulus, compared to the other existing structural materials. Carbon fiber composites are advantageous in areas where high density, stiffness, weight, and fatigue properties are required, and where high temperatures and chemical stability are required.
Carbon fiber is produced at the beginning of the 50’s, in need of rockets, aerospace and aviation and other cutting-edge science and technology, and now also widely used in sports equipment, textiles, chemical machinery and medical fields. With the high technology for new materials, technical performance requirements increasingly stringent, prompting scientific and technological workers continue to strive to improve. In the early 80’s, high-performance and ultra-high performance carbon fiber appeared one after another, which is technically another leap, but also marks the carbon fiber research and production has entered an advanced stage.
The combination of carbon fiber and epoxy resin composites, due to its small density, good rigidity and high strength and become advanced aerospace materials. Because the weight of spacecraft for each reduction of 1 kg, can make the launch vehicle to reduce 500 kilograms, Therefore, in the aerospace industry competing to adopt advanced composite materials. There is a vertical landing fighter, which uses carbon fiber composite materials accounted for the whole weight of 1/4, accounting for one-third of the weight of the wing. According to reports, the US space shuttle rocket thrusters on three key components and advanced MX missile launch tubes, are made of advanced carbon fiber composite materials. Now F1 (World Formula One Championship) racing, most of the body structure is with carbon fiber materials. Top sports car is a big selling point is the whole body to use carbon fiber, to improve the aerodynamic and structural strength.
Carbon fiber can be processed into fabric, felt, seats, tape, paper and other materials. In addition to the traditional use of carbon fiber insulation materials used for insulation, the general is not used alone, as a reinforcement material added to the resin, metal, ceramics, concrete and other materials, constitute a composite material. Carbon fiber reinforced composite materials can be used as aircraft structural materials, electromagnetic shielding materials in addition to electricity, artificial ligaments and other body substitutes materials and used in the manufacture of rocket shell, motor boats, industrial robots, automobile leaf spring and drive shaft.
Chemical properties and application areas of carbon-carbon composite materials
Chemical Properties / Carbon Fiber Composites
Carbon fiber is inorganic polymer fibers with carbon content more than 90%. The carbon content with more than 99% is graphite fiber. Carbon fiber axial strength and modulus, no creep, good fatigue resistance, specific heat and electrical conductivity between the non-metallic and metal, thermal expansion coefficient is small, good corrosion resistance, fiber density, X-ray penetration Good sex. But its impact resistance is poor, easy to damage; under the action of strong acid oxidation, and metal complex will occur when the metal carbonation, carburizing and electrochemical corrosion. Therefore, surface treatment is need for the carbon fiber before production.
Areas of application / carbon fiber composites
Carbon fiber is widely used in civil, military, construction, chemical, industrial, aerospace and super sports car area. Carbon fiber can be processed into fabric, felt, seats, tape, paper and other materials. In addition to the traditional use of carbon fiber insulation materials used for insulation, normally not used alone, but as a reinforcement material added to the resin, metal, ceramics, concrete and other materials, constitute a composite material. Carbon fiber reinforced composite materials can be used as aircraft structural materials, electromagnetic shielding materials in addition to electricity, artificial ligaments and other body substitutes materials and used in the manufacture of rocket shell, motor boats, industrial robots, automobile leaf spring and drive shaft. From 1994 to 2002 or so, with the staple fiber from carbon fiber to long-fiber carbon fiber academic research, the use of carbon fiber production of heating material technology and products have gradually entered the military and civilian fields. China has been using long-fiber carbon fiber production of national grid cable use cases many.
Carbon fiber is a dual-use of new materials, technology-intensive and politically sensitive key materials. Previously, the United States led the Coordinating Committee of the European Commission (COCOM), the then socialist countries embargo policy, in March 1994, COCOM although disbanded, but the shadow of the embargo is still shrouded in the sky, advanced carbon fiber technology Is still not cited, especially high-performance PAN-based wire technology, even if China entered the WTO, the situation will not happen big change. Therefore, in addition to people continue to develop self-reliance carbon fiber industry, there is no other choice. Therefore, foreign countries, especially Japan and South Korea, which are leading in the production of carbon fiber, have maintained a very cautious attitude towards the export of carbon fiber materials and products in China. Only a few Chinese enterprises can establish cooperative relations with them and have import channels for their products.