TY - GEN
T1 - Evolution of surface oxide layer and oxidation-induced dimensional changes during passive oxidation of Silicon Carbide
AU - Kakanuru, Padmalatha
AU - Liang, Jianyong
AU - Pochiraju, Kishore
PY - 2014
Y1 - 2014
N2 - Silicon Carbide (SiC) fiber composites are preferred as structural materials for advanced engine, gas turbine, heat exchanger and nuclear reactor applications due to their light weight, high thermal shock resistance and toughness engineered by material design. However SiC composites undergo damage when exposed to high temperature oxidative environments. Hence the durability of these composites is influenced by the oxide growth, oxidation-induced stress and damage evolution. In this paper, the passive oxidation is modeled as a moving boundary diffusion/reaction problem with oxidation-state dependent diffusion and solubility. The oxide growth on silicon and silicon carbide substrates is predicted with a one-dimensional diffusion/reaction model and validated with the Deal-Grove model predictions. The volumetric strain induced in an unconstrained SiC fiber and the resultant shape changes are predicted.
AB - Silicon Carbide (SiC) fiber composites are preferred as structural materials for advanced engine, gas turbine, heat exchanger and nuclear reactor applications due to their light weight, high thermal shock resistance and toughness engineered by material design. However SiC composites undergo damage when exposed to high temperature oxidative environments. Hence the durability of these composites is influenced by the oxide growth, oxidation-induced stress and damage evolution. In this paper, the passive oxidation is modeled as a moving boundary diffusion/reaction problem with oxidation-state dependent diffusion and solubility. The oxide growth on silicon and silicon carbide substrates is predicted with a one-dimensional diffusion/reaction model and validated with the Deal-Grove model predictions. The volumetric strain induced in an unconstrained SiC fiber and the resultant shape changes are predicted.
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M3 - Conference contribution
AN - SCOPUS:84922156275
T3 - Proceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
BT - Proceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
T2 - 29th Annual Technical Conference of the American Society for Composites, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
Y2 - 8 September 2014 through 10 September 2014
ER -