| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
|
| Presentation Title |
Nano- and Micro-scale Thermal Transport in Swift heavy Ion Irradiated Oxides |
| Author(s) |
Azat Abdullaev, Vinay S Chauhan, Jacques O'Connel, Vladimir Skuratov, Arno Janse van Vuuren, Marat Khafizov, Zhandos N Utegulov |
| On-Site Speaker (Planned) |
Azat Abdullaev |
| Abstract Scope |
We investigated thermal transport in swift heavy ion irradiated oxide materials: Al2O3, MgO and Y3Al5O12 (YAG), irradiated by 167 MeV Xe ions at 1012 – 1014 ions/cm2 fluences. We observed ion tracks in sapphire and YAG at low dose. In Al2O3, the tracks overlap at high fluences resulting in sub-surface amorphization. Thermal transport assessment was conducted by time-domain thermoreflectance (TDTR) and spatial domain thermoreflectance (SDTR) methods. Combination of them allowed us to isolate conductivities of different damage regions characterized by distinct microstructure evolution regimes. Nanoscale thermal conductivity of thin amorphous and cross-plane conductivity in ion track regions was measured using TDTR. In-plane and cross plane thermal conductivities within ion track region was simultaneously measured using SDTR. These measurements reveal anisotropic thermal conductivity within Al2O3 ion track region. Simultaneous measurement of thermal transport parallel and normal to ion tracks presents a unique configuration to study nanoscale thermal transport in insulating materials. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |