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Meeting MS&T23: Materials Science & Technology
Symposium Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments IV
Presentation Title Structural Stability of REE-PO4 (REE=Sm,Tb) under Swift Heavy Ion Irradiation
Author(s) Cale C. Overstreet, Eric O'Quinn, William Cureton, Julia Leys, Guido Deissmann, Stefan Neumeier, Chien-Hung Chen, Maik Lang
On-Site Speaker (Planned) Cale C. Overstreet
Abstract Scope Rare earth element (REE) phosphates are a type of naturally occurring minerals that exhibit excellent tolerance to prolonged self-irradiation which makes them an attractive candidate material for disposal of long-lived radionuclides. Here, we show that SmPO4 (monazite, P21/n) and TbPO4 (xenotime, I41/amd) exhibit a very similar response to swift heavy ion irradiation despite different starting structures. SmPO4 and TbPO4 were simultaneously irradiated with 1.1 GeV Au ions and analyzed using synchrotron-based X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. The radiation response was evaluated by deconvoluting peaks in collected XRD patterns to obtain crystalline and amorphous phase fractions at each irradiation fluence. A direct-impact model best described the amorphization process and was used to determine the amorphous cross section and track diameter. Amorphization within individual tracks was confirmed by TEM imaging with good track size agreement. Raman spectroscopy qualitatively confirmed the ion-induced crystalline-to-amorphous transformation for both phosphates.


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Accelerated Creep Testing for High-Temperature and Nuclear Applications
Advanced In-situ Strain Mapping for Zr Oxidation by 4D-STEM
Assessing the Ability of Nuclear Fuel Performance Codes to Predict Radially Resolved Properties in Oxide Fuels
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Effect of Solutes on the Radiation Induced Segregation in Ferritic Alloys at ∑3- grain Boundaries
Effect of Strain Rate on Tensile Properties of C250 Maraging Steel
Enabling Multiscale Materials Characterization with Machine Learning
Four-dimensional Scanning Transmission Electron Microscopy (4D-STEM) Characterization of Intergranular Corrosion of Austenitic Stainless Steels in Lead-bismuth Eutectic
High-Temperature Irradiation Behavior of Piezoelectric Aluminum Nitride
In Situ SEM Nanomechanics at Cryogenic Temperatures
Interdiffusion Behaviour of UN with Zircaloy-4 via Diffusion Couple Studies
M-1: Novel Method for Fabricating and Analysis of 3D Printed Composite for Radiation Shielding Containing Metalized Halloysite Nanotube
Mapping Elemental Distributions Across Thin Corrosion Films Formed on Nuclear Reactor Core and Structural Materials via Ex-situ And In-situ Atom Probe Tomography
Multimodal Characterization of Materials Corrosion in Molten Salts
Phase Stability of Delta-ZrH Under Ion Irradiation
Probing Nanoscale Properties of Radioactive Material by Advanced Correlative Microscopy
STEM-based Mapping of Nanoscale Point Defects Produced via Temperature, Irradiation, And Corrosion
Structural Stability of REE-PO4 (REE=Sm,Tb) under Swift Heavy Ion Irradiation
Thermodynamic Modeling and Calculation of Phase Formation Processes Under Irradiation Conditions of Uranium-plutonium Nitride Fuel
Transition Metal Carbonitride Materials Exposed to Swift Heavy Ions

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