Behaviors of fine (IG-110) and ultra-fine (HPG-510) grain graphite irradiated by 7 MeV Xe26+ ions

• 作 者: Wei Qi Zhou-Tong He Bao-Liang Zhang Xiu-Jie He Can Zhang Jin-Liang Song Guan-Hong Lei Xing-Tai Zhou Hui-Hao Xia Ping Huai
• 机 构: Shanghai Institute of Applied Physics, Chinese Academy of Sciences,University of Chinese Academy of
• 出 处: Nuclear Science and Techniques
• 发表日期: 2017年10期
• 关键词: Molten salt reactor Graphite Ion irradiation Raman spectra Hardness and Youngs m

Developing a molten salt reactor needs molten salt-impermeable nuclear graphite. Ultra-fine grain graphite is a good choice as it is better in permeability than fine grain graphite. In this paper, ultra-fine grain graphite(HPG-510) and fine grain graphite(IG-110) samples are irradiated at room temperature by 7 MeV Xe ions to doses of 1 × 10~(14)-5 × 10~(15) ions/cm~2. Scanning electron microscopy, transmission electron microscopy(TEM), Raman spectroscopy and nano-indentation are used to study the radiation-induced changes. After irradiation of different doses, all the HPG-510 samples show less surface fragment than the IG-110 samples. The TEM and Raman spectra,and the hardness and modulus characterized by nano-indentation, also indicate that HPG-510 is more resistant to irradiation.

Ultra-fine grain graphite is a good choice as it is better in permeability than fine grain graphite. In this paper, ultra-fine grain graphite (HPG-510) and fine grain (IG-110) samples were irradiated at room temperature by 7 MeV Xe ions to doses of 1 × 10 ~ (14) -5 × 10 ~ (15) ions / cm ~ 2 Scanning electron microscopy, transmission electron microscopy (TEM ), Raman spectroscopy and nano-indentation are used to study the radiation-induced changes. After irradiation of different doses, all the HPG-510 samples show less surface fragment than the IG-110 samples. The TEM and Raman spectra, and the hardness and figure characterized by nano-indentation, also indicate that HPG-510 is more resistant to irradiation.