| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Seaborg Institutes: Emerging Topics in Actinide Materials and Science
|
| Presentation Title |
A Time-of-Flight Neutron Diffraction Study of δ-phase 239PuGa Alloys at Cryogenic Temperatures |
| Author(s) |
Alice I. Smith, Franz J Freibert, Sven C. Vogel, Bjorn Clausen, Jianzhong Zhang, Donald W Brown, Joan E. Siewenie, Travis D Carver, Scott Richmond, Michael Ramos |
| On-Site Speaker (Planned) |
Alice I. Smith |
| Abstract Scope |
Self-irradiation damage in Pu-Ga alloys results in lattice distortions, void swelling, He bubble formation, and daughter product ingrowth (Am/U/Np). For a more detailed picture of the less understood processes of defect accumulation and damage evolution, dose, dose rate, thermal history and alloy composition must be considered. This work is a time-of-flight neutron diffraction investigation at cryogenic temperatures of δ-phase 239Pu-Ga alloys as associated with a varied history of storage time at ambient temperature, elevated temperature annealing, and different Ga concentrations. Measurements were collected using the High-pressure Preferred Orientation (HIPPO) and the Spectrometer for Materials Research at Temperature and Stress (SMARTS) diffractometers at Lujan Neutron Scattering Center facility, Los Alamos National Laboratory. Structural changes, in particular the evolution of the lattice parameter, as a function of temperature will be discussed. The collected data contributes to a better understanding of the δ-phase 239Pu-Ga alloys average structure evolution at low temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Phase Transformations |