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Calcium-Magnesium-Alumino-Silicates (CMAS) Reaction Mechanisms and Resistance of Advanced Turbine Environmental Barrier Coatings for SiC/SiC Ceramic Matrix CompositesEnvironmental barrier coatings (EBCs) and SiC/SiC ceramic matrix composites (CMCs) systems will play a crucial role in future turbine engines for hot-section component applications because of their ability to significantly increase engine operating temperatures, reduce engine weight and cooling requirements. The development of prime-reliant environmental barrier coatings is an essential requirement to enable the applications of the 2700-3000 F EBC - CMC systems. This presentation primarily focuses on the reaction mechanisms of advanced NASA environmental barrier coating systems, when in contact with Calcium-Magnesium Alumino-Silicates (CMAS) at high temperatures. Advanced oxide-silicate defect cluster environmental barrier coatings are being designed for ultimate balanced controls of the EBC temperature capability and CMAS reactivity, thus improving the CMAS resistance. Further CMAS mitigation strategies are also discussed.
Document ID
20180000360
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Zhu, Dongming (NASA Glenn Research Center Cleveland, OH, United States)
Costa, Gustavo (Vantage Partners, LLC Cleveland, OH, United States)
Harder, Bryan J. (NASA Glenn Research Center Cleveland, OH, United States)
Wiesner, Valerie L. (NASA Langley Research Center Hampton, VA, United States)
Hurst, Janet B. (NASA Glenn Research Center Cleveland, OH, United States)
Puleo, Bernadette J. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
January 9, 2018
Publication Date
November 5, 2017
Subject Category
Composite Materials
Report/Patent Number
GRC-E-DAA-TN48558
Meeting Information
Meeting: Advanced Ceramic Matrix Composites: Science and Technology of Materials, Design, Applications, Performance and Integration Conference
Location: Santa Fe, NM
Country: United States
Start Date: November 5, 2017
End Date: November 9, 2017
Sponsors: Engineering Conferences International, Inc.
Funding Number(s)
CONTRACT_GRANT: NNC12BA01B
WBS: WBS 109492.02.03.02.02
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Environmental barrier coatings (EBCs)
ceramic matrix composites (CMCs)
defect cluster environmental barrier coating
Calcium-Magnesium Alumino-Silicates (CMAS)

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