5. Conclusion

While isotropic ex-brai carbon fibers have been widely developed for thermal applications, ex-PAN carbon fibers clearly outperform mesophase ex-brai fibers in the field of reinforcement fibers. Indeed, the production costs of ex-PAN fibers are more competitive than those of ex-brai mesophase fibers. The latter remain competitive only for very high modulus fibers.

The properties of ex-PAN carbon fibers have been greatly improved, as has the knowledge of composite design offices.

Many carbon fiber applications have yet to be developed. Of course, it's not a question of using carbon fibers for every application; the performance/cost ratio remains the overriding consideration, including all manufacturing, inspection and maintenance costs.

All future aeronautical programs will be based not only on carbon fiber composites,...

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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.