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- Title
Diffusion Behavior of Iodine in the Micro/Nano-Porous Graphite for Nuclear Reactor at High Temperature.
- Authors
Qi, Ming-Bo; Lian, Peng-Fei; Li, Peng-Da; Zhang, He-Yao; Cheng, Jin-Xing; Wang, Qing-Bo; Tang, Zhong-Feng; Pan, T. J.; Song, Jin-Liang; Liu, Zhan-Jun
- Abstract
The diffusion behavior of iodine in micro/nano-porous graphite under high-temperature conditions was studied using analysis methods such as Rutherford backscattering Spectrometry, scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The results indicate that iodine diffusion leads to the Lattice Contractions in Microcrystals, a decrease in interlayer spacing, and a rise of defect density. And the reversal or repair of microstructure change was observed: the microcrystal size of the graphite increases, the interlayer spacing appears to return to the initial state, and the defect density decreases, upon diffusion of iodine out of iodine-loaded graphite. The comparative study comparing the iodine diffusion performance of nanoporous graphite (G400 and G450) between microporous graphite (G500), showed that nanoporous graphite exhibits a better barrier to the iodine diffusion. The study on the diffusion behavior of iodine in micro/nano-porous graphite holds substantial academic and engineering value for the screening, design, and performance optimization of nuclear graphite.
- Subjects
NUCLEAR reactors; RUTHERFORD backscattering spectrometry; HIGH temperatures; NANOPOROUS materials; SCANNING electron microscopy; IODINE; KIRKENDALL effect; GRAPHITE
- Publication
C, 2023, Vol 9, Issue 3, p81
- ISSN
2311-5629
- Publication type
Article
- DOI
10.3390/c9030081