| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications III
|
| Presentation Title |
Mechanical and Irradiation Behaviors in Low-Textured Pyrolytic Carbon |
| Author(s) |
Raphaelle David, Yongfeng Zhang |
| On-Site Speaker (Planned) |
Raphaelle David |
| Abstract Scope |
Pyrolytic carbons have attracted intensive research efforts because of their wide applications from the medical field to the nuclear industry. Among those, the TRISO particle fuel, which is considered as a leading fuel candidate for various advanced reactors, must sustain a very harsh environment during its lifetime. One of its layers, the buffer layer, is made of low-textured pyrocarbon and understanding its stress and irradiation response appears as necessary. Aided by molecular dynamics simulations, superelasticity followed by ductile fracture was observed for both tensile and compressive deformations. Under tension, reorientation and unfolding of the curved crystallites were identified as elastic deformation mechanisms while shear strain between individual graphene sheets was observed in the plastic range. Under compression, crystallites’ reorientation and decreasing interlayer spacing distance were the most prominent deformation mechanisms. Moreover, irradiation simulations are carried out to understand the microstructure’s evolution observed after TRISO particle irradiation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Computational Materials Science & Engineering, Other |