Characteristics of carbon fiber materials

Carbon fiber is a fibrous carbon material, which is formed by carbonization of organic fiber precursor at a high temperature of more than 1000, and has a carbon content of more than 90%. It has the characteristics of high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance. The shape is fibrous, soft and can be processed into a variety of fabrics. Because its graphite microcrystal structure is preferably oriented along the fiber axis, it has high strength and modulus along the fiber axis.

Carbon fiber materials mainly have the following characteristics:

1.The density is 1.5~2g/cm ³, which is equivalent to 1/4 of the density of steel and 1/2 of that of aluminum alloy.

2.The strength and elastic modulus are high, the strength is 4 to 5 times higher than that of steel, and the elastic recovery is 100%.

3. The coefficient of thermal expansion is small, the thermal conductivity decreases with the increase of temperature, and it is resistant to sudden cold and heat, even if the high temperature suddenly drops from thousands of degrees Celsius to room temperature.

4. The friction coefficient is small and has lubricity.

5. Good electrical conductivity.

6. Good resistance to high temperature and low temperature, still soft and not brittle at liquid ammonia temperature.

7. Good acid resistance, inert to acid, resistant to concentrated hydrochloric acid, phosphoric acid, sulfuric acid and so on. In addition, it also has the properties of oil resistance and radiation resistance.

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