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Meeting Materials Science & Technology 2020
Symposium Coatings to Protect Materials from Extreme Environments
Presentation Title Real-time Observation of Impact Damage in Coated Silicon Carbide (SiC)
Author(s) nesredin F. kedir, Wayne Chen, Kamel Fezzaa
On-Site Speaker (Planned) nesredin F. kedir
Abstract Scope Silicon carbide (SiC) and its composites are enabling materials for advanced gas turbine engines. However, these materials require an environmental barrier coating (EBC) to prevent deterioration via hot corrosion and oxidation reactions. Additionally, the combined EBC/Ceramic must withstand damage via impact from ingested and internally originating debris. Very limited attention has been given to the latter issue, despite the understanding that both the coating and substrate are inherently brittle. Thus, the current effort aimed to elucidate the underlying damage mechanisms for a model air plasma sprayed EBC consisting of a Mullite topcoat, Silicon bond-coat and α-SiC substrate. In addition to postmortem inspection, a pulsed Synchrotron X-ray source was used to visualize, in-situ, the damage evolution with temporal and spatial resolutions of 0.5Ás and 6.4Ám respectively. The in-line impact was performed at room temperature using 1.5mm diameter Partially Stabilized Zirconia and Silicon Nitride spheres at velocities ranging between 300-355 m/s.
Proceedings Inclusion? Undecided


Aerosol Deposition and Characterization of Sodium Niobate
Aerosol Deposition Method: Influence of Particle Agglomeration on SiC Film Density
Aerosol Deposition of Hexagonal and Cubic Boron Nitride
Anisotropic Wettability of CaO-MgO-Al2O3-SiO2 Deposits on YAlO3: Implications for Grain Boundary Engineering of Environmental Barrier Coatings for Gas Engine Applications
Cathodic Arc Deposition of Silicon Aluminum Nitride Coating on SiC
Cyclic Steam Oxidation of Single Layer Ytterbium Disilicate Environmental Barrier Coatings
Dry Aerosol Deposition of SiOx Coatings for Protection of Polymers in Low Earth Orbit
Electrodeposited NiMo Coatings for Improved Molten Salt Reactor Performance
Integrated Fluid and Materials Modeling of Environmental Barrier Coatings
Novel Multiscale Shear Adhesion Testing of Thermal Barrier Coatings
Obtaining Surface Coatings Providing Protection Against High Temperatures in the Production of Coke
Obtaining Wear-resistant Titanium Coatings in SHS Conditions
Real-time Observation of Impact Damage in Coated Silicon Carbide (SiC)

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