NDLI: Creep behavior of hafnia and ytterbium silicate environmental barrier coating systems on sic/sic ceramic matrix composites

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Creep behavior of hafnia and ytterbium silicate environmental barrier coating systems on sic/sic ceramic matrix composites

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zhu, Dongming Ghosn, Louis J. Harder, Bryan Fox, Dennis S.
Copyright Year	2011
Description	Environmental barrier coatings will play a crucial role in future advanced gas turbine engines because of their ability to significantly extend the temperature capability and stability of SiC/SiC ceramic matrix composite (CMC) engine components, thus improving the engine performance. In order to develop high performance, robust coating systems for engine components, appropriate test approaches simulating operating temperature gradient and stress environments for evaluating the critical coating properties must be established. In this paper, thermal gradient mechanical testing approaches for evaluating creep and fatigue behavior of environmental barrier coated SiC/SiC CMC systems will be described. The creep and fatigue behavior of Hafnia and ytterbium silicate environmental barrier coatings on SiC/SiC CMC systems will be reported in simulated environmental exposure conditions. The coating failure mechanisms will also be discussed under the heat flux and stress conditions.
File Size	6509722
Page Count	32
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110008749
Archival Resource Key	ark:/13960/t7zm0bc34
Language	English
Publisher Date	2011-01-23
Access Restriction	Open
Subject Keyword	Composite Materials Ceramic Matrix Composites Creep Properties Simulation Ytterbium Hafnium Silicates Engine Parts Protective Coatings Thermal Stability Failure Operating Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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