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Carbon Fiber

What is carbon fiber?

Carbon fiber, alternatively graphite fiber, carbon graphite or CF, is a material consisting of fibers about 510 m in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in crystals that are more or less aligned parallel to the long axis of the fiber. The crystal alignment gives the fiber high strength-to-volume ratio (makes it strong for its size). Several thousand carbon fibers are bundled together to form a tow, which may be used by itself or woven into a fabric. Carbon fiber is a composite that has a very high strength-to-weight ratio.

It is also known for its low weight, high chemical resistance, high temperature tolerance, and low thermal expansion.

When combined with a plastic resin and wound or molded it forms carbon fiber reinforced plastic (often referred to as carbon fiber) which has a very high strength-to-weight ratio, and is extremely rigid although somewhat brittle. However, carbon fibers are also composed with other materials, such as with graphite to form carbon-carbon composites, which have a very high heat tolerance.
Carbon fiber is the common name used to refer to plastic reinforced by a graphite textile.



Carbon fiber is very expensive, but has a fantastic weight-to-strength ratio. Depending on the orientation of the fiber, the carbon fiber composite can be stronger in a certain direction or equally strong in all directions. The properties of carbon fibers, such as high stiffness, high tensile strength, low weight, high chemical resistance, high temperature tolerance and low thermal expansion, make them very popular, however, they are relatively expensive when compared to similar fibers, such as glass fibers or plastic fibers.
Carbon fibers are usually combined with other materials to form a composite.

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