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Meeting Materials Science & Technology 2020
Symposium Coatings to Protect Materials from Extreme Environments
Presentation Title Aerosol Deposition and Characterization of Sodium Niobate
Author(s) Eric A. Patterson, Scooter D Johnson, Edward Gorzkowski
On-Site Speaker (Planned) Eric A. Patterson
Abstract Scope Aerosol deposition was used to produce thick-films with layer thicknesses between 10 to 50 microns. The bonding and densification of the film and film/substrate interface facilitated by high pressure, impact and fracture of the particles, and some form of physical-chemical bonding. The films have microstructures characterized by XRD to have nano-grained crystallites and have been shown to have high residual stresses. This inhibits the formation of ferroelectric domains even in the prototypical ferroelectric system of barium titanate, which correlates to the well-known grain size effect in bulk ceramics. Due to these high residual stresses, materials systems that exhibit either antiferroelectric properties in the bulk (such as NaNbO3) or stress-stabilized ferroelectric materials (such as HfO2), are natural alternatives to be studied via this technique. Deposition was performed onto metal substrates to facilitate the characterization of the electrical properties of the films; including permittivity as a function of temperature.


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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