Abstract
To measure inter laminar shear strength (ILSS) of C/C composites at high temperatures, a graphite jig was developed on double notched specimen configuration. ILSS of unidirectional C/C composites and 0/90 cross-ply of C/C composites (HTT2000°C and 3000°C in both composites) were measured using the assembly up to 1500°C. In all tests, the shear load showed a liner increase after the initial stage of the loading. The assembly developed was satisfactorily used to measure the ILSS of the C/C composites at high temperatures. All specimens showed catastrophic fracture, and the ILSS largely increased with testing temperature, at least, above 1250°C. In C/C composites, relationships between ILSS and testing temperature seem to depend not on orientation configuration of their reinforcement but on their heat-treatment temperature.
