The pores evolution in 3D view of nuclear graphite under ion beam irradiation

JOURNAL OF NUCLEAR MATERIALS

卷:557

Article

Liu, Fanggang¹  He, Zhoutong¹  Wang, Yu¹  Zhu, Yongqi¹  Huang, Bo¹  Theodosiou, Alex²  Smith, Andy³  Jones, Abbie²  Marsden, Barry²  Wang, Jianqiang¹  Zhou, Xingtai¹ 

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Univ Manchester, Dept Mace, Manchester M13 9LP, Lancs, England

[3] Univ Manchester, Dalton Cumbrian Facil, Westlakes Sci & Technol Pk, Moor Row CA24 3HA, Cumbria, England

关键词: Ion beam irradiation;    Nuclear graphite;    FIB-SEM tomography;    Microcracks;   

DOI  :  10.1016/j.jnucmat.2021.153262

来源: Elsevier

【 摘 要 】

As an outstanding material for moderator and reflector, graphite is broadly applied in nuclear reactors. Irradiation will change the pore structure and content, which is intimately related to the properties of graphite. However, the irradiation effect of nuclear graphite on pores requires a more profound understanding, especially the evolution on a three-dimensional(3D) view. In this work, FIB-SEM tomography intuitively reveal the pore structure and porosity evolution of ion irradiated graphite grades IG110 in a 3D view, which was irradiated with 30 MeV Ni5+ ion at 400 degrees C. Besides, the quantitative statistic of porosity indicates a negative correlation between porosity with the ion irradiation damage and confirms the consistency of ion deposition sites and irradiation damage peak. Moreover, individual microcracks of the different ion irradiated depths and virgin graphite are extracted and displayed in various 3D perspectives, which exhibit a much more complex morphology than lenticular structure and demonstrates the closed trend of the microcracks under irradiation. Through the display of 3D pore structure and quantitative statistics of porosity, aims to provide a further understanding of ion irradiation behavior of nuclear graphite. (C) 2021 Elsevier B.V. All rights reserved.

【 授权许可】

Free