| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Components
|
| Presentation Title |
The Merit of In-situ Environmental TEM for the Study of Tungsten under Fusion-relevant Conditions |
| Author(s) |
Maanas Togaru, Rajat Sainju, Yuanyuan Zhu |
| On-Site Speaker (Planned) |
Yuanyuan Zhu |
| Abstract Scope |
Tungsten has been selected as the plasma-facing divertor material at the ITER. With a view to transient events, air ingress accidents and future DEMO PFM safety, engineering tungsten with enhanced oxidation resistance and mechanical performance including ductility and DBTT has attracted an increasing attention in the fusion community. However, significant knowledge gaps exist in the understanding of the oxidation mechanism and kinetics of tungsten and associated alloys, and how passivating elements conflict and/or compromise the mechanical properties. In this talk, we demonstrate how the novel MEMS-based in-situ environmental TEM, capable of mimicking the actual air ingress scenario at atmospheric pressure, can be utilized to directly access scale phases evolution and elucidate the mechanisms underpinning oxidation onset and kinetics. New insights on irradiation-assisted tungsten and tungsten alloy oxidation hold a great promise for reinforcing design criteria that balance mechanical properties with oxidation resistance for the development of next-generation tungsten-based PFMs. |
| Proceedings Inclusion? |
Planned: |