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Topography changes and microstructural evolution of nuclear graphite (IG-110) induced by Xe26+ irradiation

ZHANG He-yao CHENG Jin-xing SONG Jin-liang YIN Hui-qin TANG Zhong-feng LIU Zhan-jun LIU Xiang-dong

张鹤耀, 程金星, 宋金亮, 阴慧琴, 唐忠锋, 刘占军, 刘向东. IG-110核石墨经Xe26+辐照后的形貌和微观结构演化. 新型炭材料(中英文), 2023, 38(2): 393-404. doi: 10.1016/S1872-5805(23)60708-5
引用本文: 张鹤耀, 程金星, 宋金亮, 阴慧琴, 唐忠锋, 刘占军, 刘向东. IG-110核石墨经Xe26+辐照后的形貌和微观结构演化. 新型炭材料(中英文), 2023, 38(2): 393-404. doi: 10.1016/S1872-5805(23)60708-5
ZHANG He-yao, CHENG Jin-xing, SONG Jin-liang, YIN Hui-qin, TANG Zhong-feng, LIU Zhan-jun, LIU Xiang-dong. Topography changes and microstructural evolution of nuclear graphite (IG-110) induced by Xe26+ irradiation. New Carbon Mater., 2023, 38(2): 393-404. doi: 10.1016/S1872-5805(23)60708-5
Citation: ZHANG He-yao, CHENG Jin-xing, SONG Jin-liang, YIN Hui-qin, TANG Zhong-feng, LIU Zhan-jun, LIU Xiang-dong. Topography changes and microstructural evolution of nuclear graphite (IG-110) induced by Xe26+ irradiation. New Carbon Mater., 2023, 38(2): 393-404. doi: 10.1016/S1872-5805(23)60708-5

IG-110核石墨经Xe26+辐照后的形貌和微观结构演化

doi: 10.1016/S1872-5805(23)60708-5
基金项目: 国家自然科学基金项目(No.52072397);中国科学院洁净能源创新研究院合作基金 (DNL202012)
详细信息
    通讯作者:

    宋金亮,博士,研究员. E-mail:songjinliang@sinap.ac.cn

    阴慧琴,博士,副研究员. E-mail:yinhuiqin@sinap.ac.cn

    唐忠锋,博士,研究员. E-mail:tangzhongfeng@sinap.ac.cn

  • 中图分类号: TL342

Topography changes and microstructural evolution of nuclear graphite (IG-110) induced by Xe26+ irradiation

Funds: This work was supported by the National Natural Science Foundation of China (No. 52072397) and the DNL Cooperation Fund, CAS(DNL202012)
More Information
  • 摘要: 核石墨作为核反应堆的关键材料,受到核反应堆内的高通量辐照后其微观结构会产生损伤,直接影响反应堆的安全运行。为研究核石墨的辐照损伤行为,以IG-110核石墨为研究对象,研究了7 MeV Xe26+辐照对核石墨的形貌和微观结构影响。采用扫描电子显微镜、原子力显微镜、掠入射X射线衍射仪、拉曼光谱仪和纳米压痕仪对IG-110核石墨的形貌和微观结构进行了表征。结果表明,在0.11 dpa剂量辐照后,IG-110核石墨表面出现“ridge-like”结构,该结构主要在黏结剂区出现,且表面粗糙度略有增加。随着剂量的进一步增加,填料区也出现“ridge-like”结构。在0.55 dpa的剂量下,因表面孔结构的闭合而引起的新孔增多,表面粗糙度增加。这种形貌和微观结构的变化归因于石墨沿C轴方向的膨胀,且石墨薄片中的缺陷密度和面内无序度随剂量的增加而增加,但力学性能呈先增加后降低的趋势。前者是由位错钉扎和微孔闭合引起的,而高剂量辐照后力学性能下降归因于孔隙率的增加和非晶结构的产生。
  • FIG. 2243.  FIG. 2243.

    FIG. 2243..  FIG. 2243.

    Figure  1.  SEM images of IG-110 graphite (a, c, e and g) before and after irradiation at surface damage doses of (b) 0.02 dpa, (d) 0.11 dpa, (f) 0.55 dpa and (h) 1.25 dpa. (F, B, P and R refer to filler particle, binder phase, pores and ridge-like structures, respectively)

    Figure  2.  The average ΔL versus the surface irradiation damage dose

    Figure  3.  Magnified SEM images of IG-110 graphite (a, c, e and g) before and after irradiation at surface damage doses of (b) 0.02 dpa, (d) 0.11 dpa, (f) 0.55 dpa and (h) 1.25 dpa (F, B, C and H refer to filler particle, binder phase and crack, respectively)

    Figure  4.  AFM images of IG-110 graphite (a) before and after irradiation at surface damage dose of (b) 0.02 dpa, (c) 0.11 dpa, (d) 0.55 dpa and (e) 1.25 dpa. (f) The surface roughness and peak-to-peak distance varies with the surface damage dose

    Figure  5.  GIXRD patterns and (002) peaks of IG-110 graphite (a) before and (b) after irradiation. (c) Lc and d002 as functions of the irradiation damage dose

    Figure  6.  Raman spectra with linear background subtraction of IG-110 graphite (a) before and after irradiation at surface damage doses of (b) 0.02 dpa and (c) 0.11 dpa. All spectra are fitted with the Lorentz line shape. (d) ID/IG and (e) position and FWHM of the G peak as functions of the irradiation damage dose

    Figure  7.  (a) Young's modulus and (b) hardness of IG-110 graphite before and after irradiation and their average values as a function of the depth under different irradiation damage doses

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出版历程
  • 收稿日期:  2020-02-05
  • 修回日期:  2020-04-01
  • 网络出版日期:  2022-11-03
  • 刊出日期:  2023-04-07

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