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Environmental Barrier Coating Development for SiC/SiC Ceramic Matrix Composites: Recent Advances and Future DirectionsThis presentation briefly reviews the SiC/SiC major environmental and environment-fatigue degradations encountered in simulated turbine combustion environments, and thus NASA environmental barrier coating system evolution for protecting the SiC/SiC Ceramic Matrix Composites for meeting the engine performance requirements. The presentation will review several generations of NASA EBC materials systems, EBC-CMC component system technologies for SiC/SiC ceramic matrix composite combustors and turbine airfoils, highlighting the temperature capability and durability improvements in simulated engine high heat flux, high pressure, high velocity, and with mechanical creep and fatigue loading conditions. This paper will also focus on the performance requirements and design considerations of environmental barrier coatings for next generation turbine engine applications. The current development emphasis is placed on advanced NASA candidate environmental barrier coating systems for SiC/SiC CMCs, their performance benefits and design limitations in long-term operation and combustion environments. The efforts have been also directed to developing prime-reliant, self-healing 2700F EBC bond coat; and high stability, lower thermal conductivity, and durable EBC top coats. Major technical barriers in developing environmental barrier coating systems, the coating integrations with next generation CMCs having the improved environmental stability, erosion-impact resistance, and long-term fatigue-environment system durability performance will be described. The research and development opportunities for turbine engine environmental barrier coating systems by utilizing improved compositions, state-of-the-art processing methods, and simulated environment testing and durability modeling will be briefly discussed.
Document ID
20160010286
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Zhu, Dongming
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 12, 2016
Publication Date
January 25, 2016
Subject Category
Composite Materials
Report/Patent Number
GRC-E-DAA-TN29251
Report Number: GRC-E-DAA-TN29251
Meeting Information
Meeting: International Conference and Expo on Advanced Ceramics and Composites
Location: Daytona Beach, FL
Country: United States
Start Date: January 24, 2016
End Date: January 29, 2016
Sponsors: American Ceramic Society
Funding Number(s)
WBS: WBS 109492.02.03.02.02.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Environmental Barrier Coatings
Stress and Environment Effects
Ceramic Matrix Composites
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