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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Thermal Property Characterization, Modeling, and Theory in Extreme Environments
Presentation Title Thermal Conductivity and Heat Transport Processes of Ion Irradiated and Laser Heated Solids
Author(s) Patrick E. Hopkins, Thomas Pfeifer, Ethan Scott, John Gaskins, David Hans Olson, Khalid Hattar, Mark Goorsky
On-Site Speaker (Planned) Patrick E. Hopkins
Abstract Scope The defects, temperature gradients and phase changes that can occur during ion irradiation and intense laser heating of solids can give rise to spatial gradients of varying thermal processes that push the extremes of thermal conduction in materials. In this work, we present a series of works in which we use a recently-developed steady-state thermoreflectance technique (SSTR) to characterize the thermal conductivity of materials after ion irradiation or during intense laser heating. We will discuss: i) thermal boundary conductance across GaN interfaces, and how ion irradiation can lead to increases in phonon heat conduction; ii) profiling the thermal conductivity of ion irradiated diamond as a function of depth under the surface through the end of range; and iii) measuring the thermal conductivity of intensely laser heated materials with temperature gradients on the order of 100’s of degree’s per micron, including molten salt materials of interest to next generation reactor technologies.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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
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
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 Eelta-UZr2
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 Stability of Metallic Multilayers with TripleJjunctions
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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