About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Irradiation Effects in Nanostructured Ceramics |
Author(s) |
William J. Weber, Chien-Hung Chen, Jagdish Narayan, Yanwen Zhang |
On-Site Speaker (Planned) |
William J. Weber |
Abstract Scope |
Nanolayered and nanocrystalline ceramics have superior properties for nuclear and aerospace application under extreme environments. The nano-grain size and nano-laminate structure due to high stacking fault densities in nano-engineered SiC leads to rapid two-dimensional interlayer diffusion of defects and helium that enhances radiation resistance and affects the evolution of helium bubbles. The irradiation response of nanocrystalline ZrO2 and CeO2 has been investigated over a range of ions and temperatures. In both ZrO2 and CeO2, the cubic structure is stable and the grain size increase with ion fluence; however, grain growth is much faster in ZrO2 at cryogenic temperatures, indicating critical role of charged defects. The radiation resistance of an embedded nanolayer of Q-carbon, which is a new phase of carbon with much higher density and hardness than diamond, has been demonstrated; this unique material has great potential as a coating in nuclear and aerospace applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Nanotechnology, Nuclear Materials |