| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
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| Presentation Title |
Immiscible Phase Interfaces: Controlling Irradiation Amorphization and Void Swelling |
| Author(s) |
Janelle P. Wharry, Priyam V Patki, Doruk Aksoy, Timothy J Rupert, Wei-Ying Chen, Shujuan Wang, Yaqiao Q Wu, Kristopher A Darling |
| On-Site Speaker (Planned) |
Janelle P. Wharry |
| Abstract Scope |
The objective of this talk is to demonstrate how interfaces in nanostructured, immiscible binary alloys modulate structural and dimensional instabilities under irradiation. Nanostructuring is a longstanding alloy design strategy to increase resistance against irradiation-induced void swelling. But more recently, alloy design within a miscibility gap has shown exceptional potential for radiation tolerance. This study explores underlying mechanisms of the irradiation stability of nanostructured, immiscible Cu-10at.%Ta, with specific focus on Cu-Ta and Cu-Cu interfaces. We report on complementary transmission electron microscopy (TEM) in situ irradiations and molecular dynamics (MD) simulations. TEM in situ irradiation reveals a competition between amorphization and void nucleation at interphase boundaries, with amorphous Cu-Ta core-shell structures favored to form with lighter irradiating ions and at lower temperatures. MD confirms the point defect sink efficiency of an amorphous Cu-Ta interfacial phase. Results will be discussed in the context of engineering irradiation-stable nanostructured alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Nuclear Materials, Characterization |