| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Synthesis of UN-U3Si2 Composite Fuels by Spark Plasma Sintering and Properties Characterization |
| Author(s) |
Bowen Gong, Erofili Kardoulaki, Andre Broussard, Dong Zhao, Joshua White, Kathryn Metzger, Michael R. Sivack, Kenneth J. Mcclellan, Edward J. Lahoda, Jie Lian |
| On-Site Speaker (Planned) |
Bowen Gong |
| Abstract Scope |
UN-U3Si2 composites are considered as a potential candidate of accident tolerant fuels because of their high uranium density and thermal conductivity. However, the UN-U3Si2 composite experiences thermal mismatch-induced micro-cracking in the fuel pellets sintered by conventional approaches. Here, we explore the feasibility of using spark plasma sintering (SPS) to synthesize UN-U3Si2 composites with different fractions of silicides (25 ~ 75 wt%). The phase and microstructure of the UN-U3Si2 composites are characterized, and micro-cracking can be mitigated by controlling sintering conditions. Thermal-mechanical properties and oxidation resistance of the composite fuels are characterized by laser flash, indentation and dynamic oxidation tests. An UN-50 wt% U3Si2 composite displays simultaneously-high strength and fracture toughness and excellent thermal conductivity. The onset temperatures of the composites are close to 530 °C, suggesting an improved oxidation resistance than monolithic UN. These results highlight the potential of synergizing UN and U3Si2 in composites with enhanced properties. |
| Proceedings Inclusion? |
Undecided |