About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Defect Transport and Microstructural Evolution in Irradiated Nanocrystalline Oxides |
Author(s) |
Nachiket Shah, Nathan Madden, Khalid Hattar, Jessica A. Krogstad |
On-Site Speaker (Planned) |
Jessica A. Krogstad |
Abstract Scope |
The successful strategy of using nanocrystalline or nanolaminate microstructures to increase the irradiation-induced defect sink density has been demonstrated in a wide range of metallic systems; however, the same strategy has been less successful for ceramics. Porous ceramics may provide the necessary combination of defect sinks and microstructural compliance to achieve an invariant microstructure that successfully suppresses radiation driven microstructural evolution. The underlying mechanisms contributing to the stability of porous ceramics are revealed through a combination of in-situ and ex-situ irradiation studies designed to isolate defect generation, interaction and transport behaviors. First, a new method for extracting radiation enhanced diffusivity data from in-situ irradiation of nanoparticles will be demonstrated for a range of temperatures and compositions. This insight will then be used to understand the evolution of nanocrystalline-nanoporous microstructures irradiated ex-situ. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Ceramics, Nuclear Materials |