| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Seaborg Institutes: Emerging Topics in Actinide Materials and Science
|
| Presentation Title |
Thermodynamic Properties of Pu-U-Fe-Ga Intermetallics |
| Author(s) |
Andrew Charles Strzelecki, Najeb Mohammed Abdul-Jabbar, S. Scott Parker, W. Adam Phelan, Jason T. Rizk, Shane C. Mann, David C. Arellano, Paul H. Tobash, Nathan A. Conroy, Hakim Boukhalfa, Sarah C. Hernandez, Eric D. Bauer, Jeremy N. Mitchell, Hongwu Xu |
| On-Site Speaker (Planned) |
Hongwu Xu |
| Abstract Scope |
Ga is a quintessential element in Pu metallurgy due to its role in stabilizing the δ-phase. By contrast, Fe is a complicating element in the metallurgy of actinides (An), as it has limited solubility (~200 wppm) and forms An-intermetallics (e.g., An6Fe and AnFe2) at high temperatures (T). It is conceivable that ternary intermetallic compounds An-Fe-Ga may form, as there are six intermetallic compounds of U-Fe-Ga. A 2019 CALPHAD study, by Moore et al. (2019), on the Pu-U-FeGa system identified a knowledge gap that high-T thermodynamic data of the ternary phases U-Fe-Ga and Pu-Fe-Ga are lacking. In this work, we have measured the thermodynamic properties of several Pu-U-Fe-Ga compounds by differential scanning calorimetry, physical properties measurement systems (PPMS) measurements, and high temperature oxide/gallium melt drop solution calorimetry. The derived parameters include Cp, ΔSf, ΔHf, ΔHfus, and ΔGf, which will be utilized in modelling phase equilibria of the Pu-U-Fe-Ga system. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Other |