About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Radiation Effects in Metals and Ceramics
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Presentation Title |
H-61: Radiation Tolerance in Stabilized Alumina Coatings: an In-situ Irradiation Study |
Author(s) |
Matteo Vanazzi, Davide Loiacono, Wei-Ying Chen, Meimei Li, Marco G. Beghi, Fabio Di Fonzo |
On-Site Speaker (Planned) |
Matteo Vanazzi |
Abstract Scope |
Innovative reactors require new material strategies. Recently, coatings have earned great interest, since they could tackle major issues like corrosion or fretting. In this framework, alumina coatings by IIT have been characterized as corrosion-resistant barriers and tested under ion irradiation, being stable up to 150 dpa. The radiation tolerance is related to the amorphousness of the material, which crystallizes under irradiation. To preserve this tolerance and improve the range of operation, the amorphous matrix must be conserved. Here, the stabilization of alumina by doping is evaluated. Irradiation is performed with in situ TEM at the IVEM-Tandem facility (ANL). Samples are irradiated with different ions, up to 20 dpa. Experiments are performed at 600 and 800 °C. Doped alumina retards the crystallization, even under irradiation. Doping stabilizes the metastable phases of alumina, preserving the pristine characteristics. Moreover, while pure alumina suffers from voids formation, no swelling appears in the doped counterpart. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |