The Influence of Matrix Precursors and Various Reinforcements on the Properties of Pitch-Based C/C Composites

The high thermal conductivity and very low coefficient of thermal expansion of C/C composites make them an ideal choice for braking systems. However, their application to conventional land vehicles is limited by their high cost which results from the expensive technology required for their fabrication. Additionally, the development of porosity on carbonization makes necessary the application of subsequent densification cycles. The use of more simple technologies, together with precursors of improved properties, which eliminate or reduce the final densification steps, could substantially reduce the price of composites. In this study, a first approach of the use of granular carbons as reinforcements (coke, graphite, anthracite) together with treated pitches (air-blown and thermally treated) in the preparation of C/C composites is reported.