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Meeting Materials Science & Technology 2019
Symposium Sandphobic Thermal/Environmental Barrier Coatings
Organizer(s) Mikayla J. Walock, U.S. Army Research Laboratory
Andy Nieto, US Army Research Laboratory
Clara M. Mock, US Army Research Laboratory
Anindya Ghoshal, US Army Research Laboratory
Muthuvel Murugan, US Army Research Laboratory
Marc S Pepi, US Army Research Laboratory
Scope Advanced gas turbine engines for military/commercial fixed-wing and rotary-wing aircraft use thermal/environmental barrier coatings (T/EBCs) in the high-temperature sections of the engine for improved efficiency and power. In many places throughout the world, commercial and military aircraft are operating in particulate-laden atmospheres, such as sandy deserts, volcanic zones, and polluted mega-cities. For rotorcraft gas turbine engines, the sand ingestion is particularly adverse during take-off, near-ground hovering, and landing conditions. Although most rotorcraft gas turbine engines are fitted with inlet particle separators, they are not efficient in filtering fine particles (75 micrometers or below). The presence of these fine solid particles in the working fluid medium has an adverse effect on the durability of protective coatings on turbomachinery components and the overall performance of the engine. Typical damage includes coating wear, blocked cooling channels, sand glazing, calcia-magnesia-alumino-silicate (CMAS) attack, and oxidation. Environmental particulate damage can cause rapid performance deterioration, which has lead to the loss of aircraft. This symposium will provide researchers the opportunity to discuss state-of-the-art computational and experimental research efforts aimed at understanding the physico-chemical interactions of fine environmental particulate with the advanced coating materials that protect metallic and ceramic engine components.

This symposium is dedicated to the memory of Dr. Dongming Zhu (ACerS Fellow). During his 22 years of government service at the Army Research Laboratory and NASA, Dr. Zhu was a leading expert on thermal/environmental barrier coatings and their interactions with molten particulates.

Abstracts Due 04/05/2019
Proceedings Plan Definite: At-meeting proceedings

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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