|About this Abstract
||Materials Science & Technology 2020
||Coatings to Protect Materials from Extreme Environments
||Integrated Fluid and Materials Modeling of Environmental Barrier Coatings
||David Newsome, Rae Waxman, Andreas Hoffie, Ashok Raman, Debasis Sengupta, Stewart Silling
|On-Site Speaker (Planned)
Ceramic matrix composites (CMC) are under development as alternative materials to superalloys for engine components. The safe and reliable use of the Si-based materials in the hot sections of gas turbine engines is critically reliant upon the performance and integrity of the environmental barrier coating (EBC). CFD Research is developing a physics-based simulation workflow and multiscale model of an EBC system interacting with the flow environment. The modeling procedure uses computational fluid dynamics (CFD) to establish the conditions at the part surface. The response of the coating materials is modeled in a meshfree continuum mechanics method, peridynamics (PD), at the microscale, where each constituent phase of the coating system is discretely resolved using a digital microstructure of the EBC. We will present our results on microscale delamination mechanism with growth of thermally grown oxide layer under an oxidative environment.