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Meeting Materials Science & Technology 2020
Symposium Coatings to Protect Materials from Extreme Environments
Presentation Title Aerosol Deposition Method: Influence of Particle Agglomeration on SiC Film Density
Author(s) Derek W. Davies, Michael G. Gammage, Michael F. Becker, John W. Keto, Desiderio Kovar
On-Site Speaker (Planned) Derek W. Davies
Abstract Scope The aerosol deposition method (ADM) process produces thick films by accelerating aerosolized nanoparticles through a nozzle from near atmospheric pressure (300-760 Torr) to medium vacuum (1-3 Torr). By impacting these particles on a substrate translated orthogonal to the aerosol jet, patterned films are deposited. Compared to other particle deposition processes using high velocity impaction such as cold spray, ADM has demonstrated the unique capability of depositing high quality ceramic films at room temperature. Particle agglomeration occurs ubiquitously for the sub-micron particles used in ADM and is believed to significantly affect the density and microstructure of the deposited film. We perform molecular dynamics simulations of multi-particle agglomerate impact, varying the size and shape of the agglomerate, to determine the effect of agglomeration on film density. These simulation results are compared to experimental results from SiC films with the aim of understanding how agglomerate size and morphology influences deformation and bonding mechanisms.


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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