| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
H-55: Microstructural Response of FeCr/Y2O3 Bilayer System to He/H Implantation |
| Author(s) |
Olga Emelianova, Aurelie Gentils, Maria Ganchenkova, Amir Gumarov, Igor Yanilkin, Iskander Vakhitov, Igor Golovchanskiy, Igor Shchetinin, Lenar Tagirov, Vladimir Borodin |
| On-Site Speaker (Planned) |
Aurelie Gentils |
| Abstract Scope |
The high radiation tolerance of oxide-dispersion strengthened steel is often attributed to the efficient trapping of helium and hydrogen at oxide/matrix interfaces. A clearer picture of the involved mechanisms can be obtained using model FeCr/Y2O3 thin films. Such bilayers were implanted with helium, hydrogen and krypton ions and characterized using TEM techniques. At room temperature, the implantation of either He or H creates nanometer-size cavities in the metal, oxide and at the interface. Consecutive He/H implantation leads to clear synergetic effects and interfacial de-cohesion. Room temperature Kr+ irradiation creates small features, presumably cavities, in the metal only. Finally, helium implantation at 550°C produces in the metal a typical gas cavity pattern with larger cavities at grain boundaries, but no changes in the oxide and at the interface. The implications of results for clarifying the He and H impact on the microstructural evolution at and near the metal/oxide interface are discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |