Evolution of surface oxide layer and oxidation-induced dimensional changes during passive oxidation of Silicon Carbide

Padmalatha Kakanuru, Jianyong Liang, Kishore Pochiraju

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
ISBN (Electronic)9781605951249
StatePublished - 2014
Event29th Annual Technical Conference of the American Society for Composites, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting - La Jolla, San Diego, United States
Duration: 8 Sep 201410 Sep 2014

Publication series

NameProceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting

Conference

Conference29th Annual Technical Conference of the American Society for Composites, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
Country/TerritoryUnited States
CityLa Jolla, San Diego
Period8/09/1410/09/14

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