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Meeting MS&T22: Materials Science & Technology
Symposium Advanced Materials for Harsh Environments
Presentation Title CMAS Interaction with Model YAlO3 Environmental Barrier Coatings: Effect of Y3Al5O12 Precipitation on Apatite Nucleation and Growth
Author(s) Amanda M. Velazquez Plaza, Amanda R. Krause
On-Site Speaker (Planned) Amanda M. Velazquez Plaza
Abstract Scope Alumina ceramic-matrix composite parts allow higher operating temperatures and lighter parts, improving the efficiency of gas turbine engines. In engine environments, alumina reacts with steam and volatilizes, requiring environmental barrier coatings (EBC) for protection. However, interaction with molten ingested aluminosilicates (CMAS) can lead to coating corrosion or grain boundary infiltration, resulting in failure. In this study, we examine the nucleation and growth mechanisms of reaction products formed from CMAS attack on single crystals of EBC candidate YAlO3 (YAP): Y3Al5O12 (YAG) and Ca4Y6(SiO4)6O (apatite). We characterized the microstructural evolution of the CMAS interaction region at 1350°C on multiple YAP substrate orientations. Varying YAP orientations led to dissimilar CMAS loading conditions and degrees of apatite coarsening. By correlating the CMAS-blocking ability with the nucleation and growth of the reaction products on different YAP crystallographic planes, we can move towards engineering a coating that favors desirable CMAS-mitigating products.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

An Investigation of High Temperature Corrosion Sensing for Coal-based Power Plant Operations
Characterization of Nb-Si Alloys for High-temperature Applications
CMAS Interaction with Model YAlO3 Environmental Barrier Coatings: Effect of Y3Al5O12 Precipitation on Apatite Nucleation and Growth
Corrosion Detection in Oil and Gas Pipeline Using 3-D Bluetooth Printed Microsensor
Corrosion Phenomena in Powder-Processed Aluminum Alloys Containing Quasicrystalline Dispersoids
Electrochemical Characterization of Joints Inconel 600 to TiC-Composites, Immersed in Seawater
Exfoliated-graphite-based Flexible Graphite as a Multifunctional Material for Harsh Environments
Expulsion of Arsenic Metals from Water Using Zinc Nanoparticles: A Review
Far-Field Passive Wireless Sensors using Conductive Ceramic for High-Temperature Health Monitoring
Grain Boundary Engineering to Improve Austenitic Stainless Steels Stress Corrosion Cracking Behavior in Boiling Saturated Magnesium Chloride Solutions
Heat-Resistant Nickel Alloy ЖС3ДК-ВІ Modification with Titanium Carbonitride Ultrafine Powders
High Temperature Irradiation Resistant Thermocouples for In-Pile Temperature Sensing
High Temperature Thick Film Sensor Development Based on Doped Lanthanum Chromites Refractory Semiconductors Materials
Integrating Multimodal Corrosion with Correlative Microscopy Across Multiple Lengthscales
Investigation of Stress Corrosion Cracking in CMSX-4 Turbine Blade Alloys Using Deep Learning Assisted X-ray Microscopy
Irvingia gabonensis Leaf-Extract Effect on Concrete Steel-Reinforcement Corrosion in Industrial/Microbial Simulating-Environment
Isothermal Oxidation Behavior of Pack-Cementation Coated Three-phase Mo-Nb-Si-B Alloys
JHU/APL’s Science of Extreme and Multifunctional Materials Program: Materials Research with Mission Intent
Modeling of High-efficiency Heat Exchanger Pipe with Twisted Tape Inserts
New Strategies for Designing Colloidal Inks for Additive Manufacturing of UHTCs
Rhenium Free Heat-resistant Monocrystalline Nickel Alloy Development
Root Cause Spectroscopic Failure Investigation Aided by High Resolution SEM/EDS, FT-IR, XPS Instruments
Silica Nanoparticles via Sol Gel Synthesis: A Concise Review on the Expulsion of Heavy Metals from Their Solution
Stress Corrosion Mitigation in Al-Mg via Zn-Rich Primers and Long-Term Performance Stability
The Role of Residual Stress in Crystallographic Orientation Dependent Corrosion Rates of Aluminum
Titanium Coatings on Materials for Harsh Environments and Corrosion in Interaction with the Environment in Coke Production
Understanding Hydration-induced Cracking, Corrosion and Self-healing Mechanisms in Advanced Concrete Using Electron Microscopy and Quantitative Non-destructive 3D Mineral Characterization
Utilization of Acacia senegal for Rubber Processing Effluent Treatment: pH Variations and Optimum Dose determination

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