Numerical modelling of oxidized microstructure and degraded properties of 2D C/SiC composites in air oxidizing environments below 800 °C

In this paper, a numerical model which incorporates the modelling of oxidized microstructure and computing of degraded elastic moduli is presented for simulation of the oxidation behaviors of 2D C/SiC composites exposed to air oxidizing environments below 800 °C. Regarding the multi-scale characteristics of 2D C/SiC composite, the microstructure modelling is carried out on microscopic and macroscopic scale, respectively to compute the degraded elastic properties in terms of time duration, temperature and pressure, whose influences upon the oxidation microstructure morphology and degraded properties of 2D C/SiC composites are also investigated. It is shown that the simulation models well the microstructure morphology after oxidation and numerical results are found to be in good agreement with experimental data.