Research on tensile fracture mechanism of hybrid carbon-carbon composites at ultra high temperature

The present paper is concerned with the evaluation of microstructure and interior defects of hybrid carbon-carbon composites with increasing temperature. The fracture mechanism of hybrid carbon-carbon composites is also investigated from SEM photographs of fractured surfaces of specimens experienced ultra-high temperature under tensile load, the conclusion is therefore obtained that the porous and cracks coalescence, growth and propagation and the fiber/matrix interfaces degeneration under the combination of ultra-high temperature and load cause strength descend, composite would fractured from a weak section.