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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Thermal Property Characterization, Modeling, and Theory in Extreme Environments
Presentation Title Ion-irradiation-induced structural disorder and thermal conductivity changes of intermetallic compounds.
Author(s) Shradha Agarwal
On-Site Speaker (Planned) Shradha Agarwal
Abstract Scope The irradiation-induced thermal conductivity changes and its correlation with microstructure was investigated in different intermetallic compounds, namely NiAl, Ni3Al, TiAl, FeAl, and Fe3Al. The samples remained unamorphized even under irradiations performed at 40 K with ~1 dpa dose. The residual state of order S = 0.13 to 0.7 was obtained for different samples using TEM diffraction patterns. The detailed microstructural investigation showed the irradiation-induced dense dislocation network in some materials. The irradiation-induced thermal conductivity changes was measured using two complementary techniques, the modulated thermoreflectance (MTR) and the transient grating spectroscopy (TGS). Both techniques showed consistent results i.e., up to 60 % reduction in thermal conductivity as a result of irradiation in some samples. The investigation on two new samples (Zr3Al and Ti3Al) are also ongoing following the same procedure as above. These samples will be purposely irradiated to induce amorphization to understand the correlation between the amorphization and thermal conductivity.
Proceedings Inclusion? Planned:


First-principles modeling of High Temperature Irradiation Resistant Thermocouple (HTIR-TC) Performance and Oxidation
A Thermodynamically-consistent Model for Heat Transport in Heterogeneous Solids
An Experimentally Validated Mesoscale Model for the Effective Thermal Conductivity of U-Zr Fuels
Atmosphere Controlled Thermogravimetric Analysis as a tool to Screen, Test and Qualify Advanced Fuels under Extreme Conditions
Connection Between Thermal Conductivity Degradation and Microstructural Changes in Graphite Due to Neutron Irradiation
Defect density and annealing kinetics estimation using thermal diffusivity measurements from Transient Grating Spectroscopy
Energy Balance Investigation of Close-coupled Optimized-pressure Gas Atomization Pour-tube Design Geometry to Prevent Melt Freeze-off
Enhanced thermal conductivity for sol-gel derived fuel candidates
From crystalline to amorphous materials: mechanisms for thermal conductivity reduction
Ion-irradiation-induced structural disorder and thermal conductivity changes of intermetallic compounds.
Measurement of density, thermal expansion, and viscosity of volatile molten salts using X-ray radiography
Mesoscale Modeling of the Effective Thermal Conductivity of a UO2-Mo Composite Nuclear Fuel
Multiphysics Mesoscale Modeling of Ablative Thermal Protection Systems
Non-magnetic Kondo effect in delta-UZr2
Oxidation Resistance Impact of Niobium and Zirconium Additions to U3Si2
Performance of UO2 reactor fuel with high thermal conductivity additives
Phase-dictated thermal conductivity response in carbon systems exposed to ion irradiation
Phonon transport in ThO2 from neutron scattering and first-principles computation
Theory of non-equilibrium thermal transport at high temperatures from first-principles.
Thermal and mechanical properties of hafnon (HfSiO4), theory and experiments
Thermal behaviors of correlated insulators ThO2 and SmB6
Thermal conductivity and heat transport processes of ion irradiated and laser heated solids
Thermal Conductivity Degradation from Irradiation-induced Microstructural Defects in Single Crystal Thorium Dioxide
Thermal gradient effect on the transport properties of helium and intrinsic defects in tungsten
Thermal Resistance at a Twist Interface: Dislocation Grid and Misorientation Phonon Scattering
Thermal stability of metallic multilayers with triple junctions
Thermal Transport Behavior of U-50Zr at the Mesoscale: Before and After Irradiation
Thermal Transport in Irradiated ThO2: A Combined Experimental and Phonon Level Investigation
Ultra-high lattice thermal conductivity and the effect of pressure in superhard hexagonal BC2N

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