Such amazing carbon fiber, do you really know it?

2021-01-26 16:25:05 3G Carbon-A 31

Carbon (C) is a magical material！


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Carbon can be diamond, graphene, or black carbon.

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Because of its tetravalent element, carbon has a three-dimensional structure of diamond, carbon nanotubes, and graphene in addition to layered graphite.

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Carbon fiber is a new type of high-strength, high-modulus fiber with a carbon content of more than 95%. The microstructure of carbon fiber is similar to artificial graphite, which is a disorderly layered graphite structure, which shows high strength along the fiber axis.

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Advantages

  1. Carbon fiber has the two major characteristics of carbon material's strong tensile strength and fiber soft processability, and is a new material with excellent mechanical properties;

  2. Carbon fiber can have good fineness, about 19g/9000 meters;

  3. Carbon fiber has electrical conductivity and certain thermal conductivity;

  4. When not in contact with air and oxidants, carbon fiber can withstand high temperatures above 3000 degrees and has outstanding heat resistance;

  5. The tensile strength of carbon fiber is about 2~7GPa, and the tensile modulus is about 200~700GPa;

  6. The density is about 1.5 to 2.0 grams per cubic centimeter;

  7. The tensile strength of carbon fiber is 7-8 times that of steel, but the density is only 1/4 of it, and the specific strength is 20 times that of iron;

  8. Carbon fiber has the ability to absorb microwaves;

  9. Carbon fiber is corrosion resistant;

  10. Carbon fiber has a certain degree of adsorption.


Disadvantages

  1. Brittle, large axial force, but poor radial force, easy to break when bent.

Classification of carbon fiber

  • Carbon fiber can be divided into polyacrylonitrile-based carbon fiber, pitch-based carbon fiber, viscose-based carbon fiber, phenolic-based carbon fiber, and vapor-grown carbon fiber according to the source of raw materials. At present, more than 90% of it is polyacrylonitrile-based carbon fiber.

  • Carbon fiber is divided into filament, short fiber and chopped fiber according to the state.

  • According to performance, it can be divided into general-purpose, high-strength, medium-model high-strength, high-model and ultra-high model carbon fiber.

Carbon fiber specifications

  • Strength: the strength of the material breaking.

  • Modulus: It is the size required under unit deformation. Simply put, the larger the modulus, the harder it is.