What are the physical and chemical properties of carbon fiber composites?

The best performance of carbon fiber is that its specific strength and specific modulus exceed that of ordinary reinforcing fibers. The specific strength and specific modulus of the composite material formed by it and resin are about 3 times higher than that of steel and aluminum alloy. Carbon fiber composite materials are used in aerospace, missiles and sports equipment, which can significantly reduce weight, increase payload, and improve performance, and are important structural materials in the aerospace industry.

1. Physical properties:

1. Low density, light weight and high specific strength. The density of carbon fiber is 1.5~2g/cm3, which is equivalent to 1/4 of the density of steel and 1/2 of the density of aluminum alloy. Its specific strength is 16 times larger than that of steel, and 12 times larger than that of aluminum alloys.

2. High strength. Its tensile strength can reach 3000~4000MPa, its elasticity is 4~5 times larger than that of steel, and 6~7 times larger than that of aluminum.

3. It has anisotropy, the thermal expansion coefficient is small, the thermal conductivity decreases with the increase of temperature, and it is resistant to sudden cooling and heat, and it will not burst even if it suddenly drops from a high temperature of several thousand degrees to normal temperature.

4. Good electrical conductivity, high modulus fiber is 775μΩ/cm at 25℃, and high strength fiber is 1500μΩ/cm.

5. Good resistance to high temperature and low temperature. Carbon fiber can be used at 2000°C, and will not melt or soften in a non-oxidizing atmosphere at 3000°C. At a low temperature of -180°C, steel becomes brittle than glass, while carbon fiber is still soft and not brittle.

6. Poor impact resistance and easy damage. (Carbon fiber composite materials are tensile and puncture resistant, and carbon fiber products should not be touched by sharp pebbles or sharp objects in life to prevent rupture).

2. Chemical properties:

1. It has good acid resistance, is inert to acid, and can resist the erosion of concentrated hydrochloric acid, phosphoric acid, sulfuric acid, benzene, acetone and other media. When carbon fibers are placed in 50% concentration of hydrochloric acid, sulfuric acid, and phosphoric acid, their elastic modulus, strength and diameter have basically no change after 200 days; they slightly expand in 50% concentration of nitric acid, and their corrosion resistance exceeds that of gold and platinum.

2. In addition, it has the characteristics of oil resistance, radiation resistance, radiation resistance, absorption of toxic gases and deceleration of neutrons.

3. Oxidation occurs under the action of strong acid, and metal carbonization, carburization and electrochemical corrosion will occur when it is combined with metal. Therefore, carbon fibers must be surface treated before use.

Founded in 2006, Jiaxing Longshine Carbon Fiber Products Co., Ltd. is China Custom Carbon Fiber Composite Manufacturers and OEM Carbon Fiber Material Suppliers, located in the center of Yangtze River Delta, the state-level Xiuzhou High-tech Industrial Development Zone of Jiaxing. In recent years, we committed to the r&d and production of carbon fiber and other composite materials in the military and civil fields, including participating in the R&D and production of C919 aircraft parts, high-speed rail accessories, and several logistics support projects.
Production process: autoclave, tube rolling, molding, bag pressing, extrusion, winding and vacuum diversion assisted molding process.
Product type: tube/pipe, plate (solid/sandwich), 3D products.
In recent years, we committed to the r&d and production of carbon fiber and other composite materials in the military and civil fields, including participating in the R&D and production of C919 aircraft parts, high-speed rail accessories, and several logistics support projects. OEM custom Carbon Fiber Composite & Material.
We are willing to sincerely work with you, win-win cooperation, and strive to make the enterprise become the industry leading, customer satisfaction, harmonious team quality enterprise, contribute to the development of the whole industry and the needs of the country.