ProgramMaster Logo
Conference Tools for Materials Science & Technology 2020
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting Materials Science & Technology 2020
Symposium Thermodynamics of Materials in Extreme Environments
Presentation Title Improved CMAS Resistance of Environmental Barrier Coatings via Tailoring Phase and Composition of Mixed Rare Earth Silicates
Author(s) Elizabeth J. Opila, Rebekah Webster, Cameron Miller, Clark Luckhardt
On-Site Speaker (Planned) Elizabeth J. Opila
Abstract Scope Environmental barrier coatings (EBCs) are required to protect SiC-based composites from rapid water vapor degradation in turbine engine combustion environments. State-of-the-art EBC materials are rare earth silicates, chosen for their reduced silica activity, chemical compatibility and thermal expansion match with the substrate. However, deleterious reactions with CMAS (CaO-MgO-Al2O3-SiO2) that is ingested into aircraft turbine engines remain a challenge. CMAS melts at approximately 1200C and can infiltrate/react with the coating, degrading the coating microstructure via crack, blister and pore formation. One approach to mitigate the degradation is to formulate coating compositions that promote CMAS reactions to form dense product phases, such as apatite, that limit further infiltration and reaction. In this presentation, novel EBC materials are described that show promise for mitigating EBC–CMAS reactions. These compositions include mixed rare earth mono- and disilicates, mixed rare earth disilicate-rare earth oxides, and mixed rare earth cations in a single monosilicate solution phase.
Proceedings Inclusion? Undecided


Ab-initio Studies of Point Defects in Alumina under Electrochemical Conditions
Density Functional Theory Modeling on the Positive Effect of H2O in Hydrogen Oxidation Reaction on Perovskite Anode for Solid-oxide Fuel Cells
Effect of Physically Determined Coordination-numbers for Modeling Molten Salt Fuels Using the Modified Quasi-chemical Model (MQM)
Ellingham Diagram to Assess Synthesis Conditions and Chemical Stability of Ceramic Membranes under Operational Conditions
Exploring Extreme Environments via In-situ Electron Microscopy
Helium Irradiation of Gd2Zr2O7 Defect-fluorite Ceramics: Interfacial Phenomena and Radiation Resistance
Improved CMAS Resistance of Environmental Barrier Coatings via Tailoring Phase and Composition of Mixed Rare Earth Silicates
Molecular Modeling of Surface Exchange Mechanisms in Solid Oxide Fuel Cell Cathodes
Nanomaterials from Geopolymer, a Low-temperature Ceramics
Pressure-induced Anomalous Phase Transition Behavior in Layered Tellurene
Stabilities and Ultrafast Dynamics of Sub-nanometer Metal Oxide Clusters
The LiF–ZrF4 System Revisited - An Updated Thermodynamic Description Using New Information Data
Thermochemical Modeling of Molten Salt Systems for Reactors and Simulations with the Molten Salt Thermodynamic Database
Thermodynamic Modelling of Vacancies in Zirconium Carbide
Thermodynamics and Elastic Properties of Cerium Doped Yttrium Aluminum Garnets

Questions about ProgramMaster? Contact