High temperature thermal and mechanical properties of high tensile carbon single filaments Original Research Article

The final quality of carbon/carbon composite materials depends strongly on the tight fit of the components. This could be predicted with a better knowledge of the intrinsic thermal and mechanical behavior of the carbon fibers. With this object, we have built-up an experimental set-up for in situ studying of dimensional variations and the bending strain at failure of single filaments from high tensile carbon fibers at temperature up to 2500 °C. We have shown off and separated the purely physical and the chemical parts of the dimensional evolution of these PAN-based filaments, in comparison to the fundamental behavior of pure graphite.