| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
|
| Presentation Title |
Quantification of total irradiation damage in nuclear graphite using Raman spectroscopy |
| Author(s) |
Ming Jiang, Chris Densham, Kavin Ammigan, George Lolov, Frederique Pellemoine, Dong (Lilly) Liu |
| On-Site Speaker (Planned) |
Dong (Lilly) Liu |
| Abstract Scope |
Raman spectroscopy has long been used in studying irradiation damage in carbon/graphite materials. However, decoupling the contribution from irradiation temperature and fluence in total damage is not feasible. A novel methodology is proposed and developed here to quantify total irradiation damage evolution at crystal level based on graphite Raman G-band position shift. Specifically, G-band positions derived from a large number of spectra collected from the fractured surface of microfine-grained POCO ZXF-5Q nuclear-grade graphite possessing proton irradiation damage gradient were plotted with open literature Raman data on HOPG, BEPO (AXGP graphite), PCEA and IG-110 graphite as a function of dpa. G-band position relative shift (ΔG) curve with a ‘turn-around’ peak as a function of total damage can be used for in-service lifetime prediction. The developed methodology has the potential to ‘unify’ total damage levels across different grades of nuclear graphite caused by ion, neutron and proton irradiation at different temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Characterization, Nuclear Materials |