التفاصيل البيبلوغرافية
| العنوان: |
Degradation of thermal transport properties in fine-grained isotropic graphite exposed to swift heavy ion beams |
| المؤلفون: |
Prosvetov, Alexey, Hamaoui, Georges, Horny, Nicolas, Chirtoc, Mihai, Yang, Florent, Trautmann, Christina, Tomut, Marilena |
| المصدر: |
Acta Materiali, 184, 187-198, (2020-02-01) |
| بيانات النشر: |
Zenodo |
| سنة النشر: |
2020 |
| المجموعة: |
Zenodo |
| مصطلحات موضوعية: |
Ion irradiation, Carbon and graphite, Thermal conductivity, Photothermal radiometry, Raman spectroscopy |
| الوصف: |
Isotropic polycrystalline graphite samples were irradiated with ~1GeV197Au and238U ions of fluences up to 5×1013ions/cm2. Beam-induced changes of thermophysical properties were characterized using frequency domain photothermal radiometry (PTR) and the underlying structural transformations were monitored by Raman spectroscopy. The ion range (~60µm) was less than the sample thickness, therefore thermal diffusivity contributions of the irradiated as well as non-irradiated layer were considered when analyzing the PTR data. At the highest applied fluences, the thermal effusivity of the damaged layer degrades down to 20% of the pristine value and the corresponding calculated values of thermal conductivity decrease from 95 Wm−1K−1for pristine material to 4 Wm−1K−1, a value characteristic for the glassy carbon allotrope. This technique provides quantitative data on thermal properties of ion-irradiated polycrystalline graphite and is very valuable for the prediction of lifetime expectancy in long-term applications in extreme radiation environments. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| Relation: |
https://doi.org/10.1016/j.actamat.2019.11.037; https://zenodo.org/communities/aries; https://zenodo.org/communities/eu; oai:zenodo.org:3560188 |
| DOI: |
10.1016/j.actamat.2019.11.037 |
| الاتاحة: |
https://doi.org/10.1016/j.actamat.2019.11.037 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/legalcode |
| رقم الانضمام: |
edsbas.59111696 |
| قاعدة البيانات: |
BASE |