2. Carbon fiber properties

Carbon fibers are increasingly used in composite materials as "high-performance" materials. Composite materials, like natural products such as wood and bone, are heterogeneous and anisotropic. Today, they are in competition with metals, which are isotropic and homogeneous materials. A growing body of knowledge, coupled with increasing experience of their use, has demonstrated that very lightweight structures can be made from composite materials.

The anisotropic properties of these composites require detailed calculations of the structures to be produced, in order to position the reinforcing carbon fibers according to the stresses applied to the parts in question. These materials can replace the lightest metals such as titanium and aluminum or their alloys (see

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Carbon fiber properties

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Special materials

Economic data

Carbon fiber prices

They are highly dependent on the quality of the carbon fibers and the inspection and testing costs demanded by customers.

We can give a range of sales prices from 20 to 150 euros/kg, staying within classic carbon fiber categories, i.e. without going into very "specific" fibers with very high modulus.

References

(1) - BACON (R.), MOSES (C.T.) - Carbon fibers, from light bulb to outer space - . American Chemical Society Symp., New-York, april 18 ^th (1986).
(2) - - Journal of Korean Industrial and Engineering Chemistry,...

Standardization

Several national standards committees have published standards for carbon fibers (table 2 ). Since 1987, a specialized ISO working group has been drawing up international standards.