| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Fundamental Ionizing and Ballistic Radiation Effects in Multi-component Mineral Phases |
| Author(s) |
Sean Drewry, Katharine Page, Kurt Sickafus, Chris Wetteland |
| On-Site Speaker (Planned) |
Sean Drewry |
| Abstract Scope |
Extended operation of light water reactors (LWRs) necessitates the need to assure the durability and reliability of component materials. Concrete structures are ubiquitous to LWRs and, critically, have load bearing as well as radiation shielding functions. Mineral phases within the concrete assemblage can have a substantial sensitivity to ionizing radiation, consequences of which are radiation induced volumetric expansion, structural order-disorder phase transformations, and amorphization. Samples of the plagioclase feldspar anorthite, CaAl2Si2O8, were irradiated with Si+, H+, and Au+ ions to investigate these effects. Disorder of the Si,Al tetrahedra can create a space group transition from P-1 to I-1. The radiation damage profile was characterized using grazing incidence (GI)-XRD along with cross-sectional TEM analysis. Rietveld refinement of the GI-XRD patterns along the damage profile can be used to determine the order to disorder phase transformation and amorphous volume. Diffractograms from the TEM analysis can elucidate the local disorder. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Characterization, Nuclear Materials |