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Meeting Materials Science & Technology 2019
Symposium Materials for Nuclear Applications
Presentation Title Effect of Ultrasonic Nanocrystalline Surface Modification (UNSM) on the Oxidation Behavior of Alloy 800HT in a Supercritical Carbon Dioxide (SCO2) Environment
Author(s) Richard Chiang, Sebastien Teysseyre, Jeffery Aguiar, Lucas Teeter, Julie Tucker, Vijay Vasudevan
On-Site Speaker (Planned) Richard Chiang
Abstract Scope UNSM was utilized in this initial study as a means to alter the surface reactivity of Alloy 800HT and induce surface/sub-surface structures that can readily supply Cr to the interface and reduce the effect of sensitization/carburization in a high temperature SCO2 environment (550C; 20MPa; 500hrs). An observable increase in surface reactivity, dislocation density and reduction in surface/sub-surface grain size is apparent with notable influence on the development of the multi-layered oxide. Though more optimization of the UNSM treatment is required, reduction in sensitization and carbon at the oxide/matrix interface shows promise as a suitable method of mitigation against degradation.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Combined Use of In-situ and Ex-situ TEM to Characterize Irradiation Induced Dislocation Loops in F/M Steels for Nuclear Applications
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Compatibility of U3Si2 fuel with FeCrAl and SiC/SiC Based Cladding
Computational Studies of Environmental Degradation of Silicon Carbide
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Development and Performance of High Temperature Irradiation Resistant Thermocouples
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Effects of Ti and Al Additions on Irradiation Behavior of FeMnNiCr Based High-Entropy Alloys
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P3-65: Effects of Deposition Conditions on the Production of ZrO2 Coatings Produced by PE-CVD as Environmental Barrier Coatings for the Molten Salt Reactor
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Spectral Thermal Conductivity Predictions in UO2 with Xe Inclusions
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Transmutation-induced Precipitation in Tungsten Irradiated with a Mixed Energy Neutron Spectrum
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