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Meeting Materials Science & Technology 2020
Symposium Thermodynamics of Materials in Extreme Environments
Presentation Title Exploring Extreme Environments via In-situ Electron Microscopy
Author(s) Khalid Hattar
On-Site Speaker (Planned) Khalid Hattar
Abstract Scope Understanding the thermodynamic stability of materials with small second phases and other heterogenous structures often requires the resolution provided by advanced electron microscopy techniques. In addition, many of the coupled extreme environments seen in nuclear, space, geological, and other harsh environments, create a great number of possible conditions in which new phases and microstructures might be present. In this presentation, we will highlight how advanced electron microscopy techniques can be utilized to characterize everything from solid state noble gasses trapped in ordered arrays of nanoscale bubbles through amorphous intergranular films created or modified through extreme thermal and radiation conditions. This presentation will highlight combined in-situ experiments with controlled radiation damage and ion implantations, while at temperatures ranging from 77K to nearly 2,000K and under quantified mechanical loading provided by the in-situ ion irradiation transmission and scanning electron microscope. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.


Ab-initio Studies of Point Defects in Alumina under Electrochemical Conditions
Density Functional Theory Modeling on the Positive Effect of H2O in Hydrogen Oxidation Reaction on Perovskite Anode for Solid-oxide Fuel Cells
Effect of Physically Determined Coordination-numbers for Modeling Molten Salt Fuels Using the Modified Quasi-chemical Model (MQM)
Ellingham Diagram to Assess Synthesis Conditions and Chemical Stability of Ceramic Membranes under Operational Conditions
Exploring Extreme Environments via In-situ Electron Microscopy
Helium Irradiation of Gd2Zr2O7 Defect-fluorite Ceramics: Interfacial Phenomena and Radiation Resistance
Improved CMAS Resistance of Environmental Barrier Coatings via Tailoring Phase and Composition of Mixed Rare Earth Silicates
Molecular Modeling of Surface Exchange Mechanisms in Solid Oxide Fuel Cell Cathodes
Nanomaterials from Geopolymer, a Low-temperature Ceramics
Pressure-induced Anomalous Phase Transition Behavior in Layered Tellurene
Stabilities and Ultrafast Dynamics of Sub-nanometer Metal Oxide Clusters
The LiF–ZrF4 System Revisited - An Updated Thermodynamic Description Using New Information Data
Thermochemical Modeling of Molten Salt Systems for Reactors and Simulations with the Molten Salt Thermodynamic Database
Thermodynamic Modelling of Vacancies in Zirconium Carbide
Thermodynamics and Elastic Properties of Cerium Doped Yttrium Aluminum Garnets

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