|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Thermal Property Characterization, Modeling, and Theory in Extreme Environments
||Thermal Conductivity and Heat Transport Processes of Ion Irradiated and Laser Heated Solids
||Patrick E. Hopkins, Thomas Pfeifer, Ethan Scott, John Gaskins, David Hans Olson, Khalid Hattar, Mark Goorsky
|On-Site Speaker (Planned)
||Patrick E. Hopkins
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.