Comparision between Fracture Behaviour of 0/90 Cross-Ply Carbon-Carbon Composites Occur During the bending and Tensile Test at High Temperature

摘要

In this investigation the bending and tensile strength with processing heat treatment temperature of PAN based high strength (T700) and high modulus (M40) carbon fiber reinforced phenolic resin based carbon matrix 2D cross-ply composites were evaluated. The apparent density and apparent porosity increases with processing temperature however, bulk density does show much change. The maximum apparent density and porosity are noticed in T-700 carbon fiber composites at 2500 deg C, even though the density of M40 fiber is higher. The bending strength is considerably greater than tensile strength through out the processing temperature. The bending and tensile strength decreases in both composites on 1000 deg C which attributed to decreases in bulk density, thereafter with processing temperature in M40 fiber composites strength increases continuously but in T700 fiber composite strength decreases after 1500 deg C. This is due to the degradation of properties of T700 fiber and M40 fiber strength retention during processing of composites as a result strength increase up to 2500 deg C continuously.