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Meeting Materials Science & Technology 2019
Symposium Sandphobic Thermal/Environmental Barrier Coatings
Presentation Title Army Advances in Sandphobic Thermal/Environmental Barrier Coatings
Author(s) Mikayla J. Walock, Clara M Mock, Andy Nieto, Andrew Wright, Anindya Ghoshal, Jian Luo, Muthuvel Murugan, Marc Pepi
On-Site Speaker (Planned) Clara M Mock
Abstract Scope When operating in particle-laden environments, military rotorcraft are prone to engine damage from the ingestion of sand, dust, and/or ash. These particulates enter the engine, pass through the compressor section to the combustor, where they undergo a phase change into the molten state. Once clear of the combustor, the molten particulates will impinge hot-section components, such as the first-stage nozzle of the high-pressure turbine. To withstand the temperatures of a gas turbine engine, hot-section components are protected by elaborate film cooling schemes and thermal barrier coatings. The particulates can clog cooling holes, infiltrate protective coatings, and potentially accumulate in the air passages of the first-stage nozzle ring. As a result, engines are pulled from service for unscheduled overhauls or they may suffer catastrophic engine failure. This presentation will summarize Army research efforts to understand and mitigate the phenomena of environmental particulate foreign object damage.


Army Advances in Sandphobic Thermal/Environmental Barrier Coatings
CMAS-Resistant YSZ-Rare Earth Oxide Composite Coatings
CMAS Removal by Spectrally Guided Laser Ablation
Development of Novel CMAS/VA Resistant TBCS: Influence of Chemical Composition and the Microstructure
Effects of Silicate Melt Chemistry on Thermochemical Interactions with Thermal Barrier Oxides
High Resolution Non-invasive Characterization of Calcium-magnesium-alumino-silicate Infiltration in Thermal Barrier Coatings
Multiphase Thermal Barrier Coatings for Broad-base Resistance to Silicate Deposits
Multlayer, Multifunctional, Thermo-structural Coatings to Mitigate Molten Silicate Attack in Aeroengines
Non-silicate Ceramic T-EBC Coatings for SiC CMCs
Numerical Investigation of Particle Deposition in Gas Turbine Blades
Processing of Laser Surface Modification of Functionally Graded Alumina/CYSZ Thermal Barrier Coating
Progress and Challenges in Understanding CMAS Attack and Developing CMAS-phobic T/EBCs
Turbulence Modulation Effects in Particle-laden Shear Driven Flows and its Impact on Material Deposition

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