Journal of Materials Science

, Volume 54, Issue 8, pp 6098–6110 | Cite as

Pore structure evolution of IG-110 graphite during argon ion irradiation at 600 °C

  • Qing HuangEmail author
  • Hui Tang
  • Yong Liu
  • Xue-Hao Long
  • Peng Liu
  • Xue-Lin WangEmail author
  • Qian-Tao Lei
  • Qi Deng
  • Yong-Qi Wang


Irradiation-induced pore structure evolution of graphite is especially important for its applications in molten salt reactors. If irradiation expands the pores, more salt will intrude into graphite components, which is undesired. In this study, multi-energy argon ions were used instead of neutrons to introduce displacement damage in IG-110 graphite at 600 °C, in order to investigate pore structure evolution of graphite during irradiation. About 71% of the pores shrank after irradiation to 21 dpa, which was proved to be a result of c-axis swelling of graphite crystallites. In contrast, only 12% of the pores expanded. The total area of gas-escape pores gradually decreased to 89% at 21 dpa. At the turnaround dose and beyond, extensively distributed submicron pores were observed, indicating an increase in newborn porosity. Combining the evolution of original pores and newborn pores, a model depicting the overall porosity’s evolution during irradiation is given in this study. Because the original porosity decreases continuously with dose and newborn pores are small in sizes, this study strongly suggests that irradiation will not facilitate salt intrusion into graphite.



This work is supported by the National Natural Science Foundation of China (11505265, 11775135, 11405097) and the Strategic Priority Research Program of Thorium-based Molten Salt Reactor (TMSR) (Grant No. XDA02040100).


  1. 1.
    Marsden BJ, Haverty M, Bodel W, Hall GN, Jones AN, Mummery PM, Treifi M (2016) Dimensional changes, irradiation creep and thermal/mechanical property changes in nuclear graphite. Int Mater Rev 61:155–182CrossRefGoogle Scholar
  2. 2.
    Freeman HM, Jones AN, Ward MB, Hage FS, Tzalepi N, Ramasse QM, Scott AJ, Brydson RMD (2016) On the nature of cracks and voids in nuclear graphite. Carbon 103:45–55CrossRefGoogle Scholar
  3. 3.
    Tang H, Qi W, He Z, Xia H, Huang Q, Zhang C, Wang X, Song J, Huai P, Zhou X (2017) Infiltration of graphite by molten 2LiF–BeF2 salt. J Mater Sci 52:11346–11359. CrossRefGoogle Scholar
  4. 4.
    Qi W, He Z, Tang H, Zhang B, Zhang C, Gao L, Song J, Zhang D, Wang X, Du X, Lei G, Xia H, Wang J, Huai P, Zhou X (2017) Effects of FLiNaK infiltration on thermal expansion behavior of graphite. J Mater Sci 52:4621–4634. CrossRefGoogle Scholar
  5. 5.
    Liu J, Neumann R, Trautmann G, Müller C (2001) Tracks of swift heavy ions in graphite studied by scanning tunneling microscopy. Phys Rev B 64:184115-1–184115-7Google Scholar
  6. 6.
    Campbell AA, Was GS (2014) Proton irradiation-induced creep of ultra-fine grain graphite. Carbon 77:993–1010CrossRefGoogle Scholar
  7. 7.
    Zhang B, Xia H, He X, He Z, Liu X, Zhao M, Zhou X (2014) Characterization of the effects of 3-MeV proton irradiation on fine-grained isotropic nuclear graphite. Carbon 77:311–318CrossRefGoogle Scholar
  8. 8.
    Chi SH, Kim GC (2008) Comparison of 3 MeV C+ ion-irradiation effects between the nuclear graphites made of pitch and petroleum cokes. J Nucl Mater 381:98–105CrossRefGoogle Scholar
  9. 9.
    Huang Q, Lei Q, Deng Q, Tang H, Wang Y, Li J, Huang H, Yan L, Lei G, Xie R (2017) Raman spectra and modulus measurement on the cross section of proton-irradiated graphite. Nucl Instrum Methods B 412:221–226CrossRefGoogle Scholar
  10. 10.
    Hinks JA, Haigh SJ, Greaves G, Sweeney F, Pan CT, Young RJ, Donnelly SE (2014) Dynamic microstructural evolution of graphite under displacing irradiation. Carbon 68:273–284CrossRefGoogle Scholar
  11. 11.
    Pedraza DF, Koike J (1994) Dimensional changes in grade H-451 nuclear graphite due to electron irradiation. Carbon 32:727–734CrossRefGoogle Scholar
  12. 12.
    Snead LL, Contescu CI, Byun TS, Porter W (2016) Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite. J Nucl Mater 476:102–109CrossRefGoogle Scholar
  13. 13.
    Jing SP, Zhang C, Pu J, Jiang HY, Xia HH, Wang F, Wang X, Wang JQ, Jin C (2016) 3D microstructures of nuclear graphite: IG-110, NBG-18 and NG-CT-10. Nucl Sci Technol 27:66-1–66-8CrossRefGoogle Scholar
  14. 14.
    Kane J, Karthik C, Butt DP, Windes WE, Ubic R (2011) Microstructural characterization and pore structure analysis of nuclear graphite. J Nucl Mater 415:189–197CrossRefGoogle Scholar
  15. 15.
    Babout L, Marsden BJ, Mummery PM, Marrow TJ (2008) Three-dimensional characterization and thermal property modelling of thermally oxidized nuclear graphite. Acta Mater 56:4242–4254CrossRefGoogle Scholar
  16. 16.
    Babout L, Marrow TJ, Mummery PM, Withers PJ (2006) Mapping the evolution of density in 3D of thermally oxidized graphite for nuclear applications. Scri Mater 54:829–834CrossRefGoogle Scholar
  17. 17.
    Huang Q, Li J, Liu R, Yan L, Huang H (2017) Surface morphology and microstructure evolution of IG-110 graphite after xenon ion irradiation and subsequent annealing. J Nucl Mater 491:213–220CrossRefGoogle Scholar
  18. 18.
    MacFarlane R, Kahler AC (2010) Methods for processing ENDF/B-VII with NJOY. Nucl Data Sheets 111:2739–2890CrossRefGoogle Scholar
  19. 19.
    Mironov BE, Freeman HM, Brown AP, Hage FS, Scott AJ, Westwood AVK, Da Costa JP, Weisbecker P, Brydson RMD (2015) Electron irradiation of nuclear graphite studied by transmission electron microscopy and electron energy loss spectroscopy. Carbon 83:106–117CrossRefGoogle Scholar
  20. 20.
    McKenna AJ, Trevethan T, Latham CD, Young PJ, Heggie MI (2016) Threshold displacement energy and damage function in graphite from molecular dynamics. Carbon 99:71–78CrossRefGoogle Scholar
  21. 21.
    Christie HJ, Robinson M, Roach DL, Ross DK, Suarez-Martines I, Marks NA (2015) Simulating radiation damage cascades in graphite. Carbon 81:105–114CrossRefGoogle Scholar
  22. 22.
    Stoller RE, Toloczko MB, Was GS, Certain AG, Dwaraknath S, Garner FA (2013) On the use of SRIM for computing radiation damage exposure. Nucl Instrum Methods B 310:75–80CrossRefGoogle Scholar
  23. 23.
    Norgett MJ, Robinson MT, Torrens IM (1975) A proposed method of calculating displacement dose rates. Nucl Eng Des 33:50–54CrossRefGoogle Scholar
  24. 24.
    Brocklehurst JE, Kelly BT (1993) The dimensional changes of highly-oriented pyrolytic graphite irradiated with fast neutrons at 430 and 600 °C. Carbon 31:179–183CrossRefGoogle Scholar
  25. 25.
    Karthik C, Kane J, Butt DP, Windes WE, Ubic R (2015) Neutron irradiation induced microstructural changes in NBG-18 and IG-110 nuclear graphites. Carbon 86:124–131CrossRefGoogle Scholar
  26. 26.
    Bollmann W (1961) Electron microscope study of radiation damage in graphite. J Appl Phys 32:869–876CrossRefGoogle Scholar
  27. 27.
    Eapen J, Krishna R, Burchell TD, Murty KL (2014) Early damage mechanisms in nuclear grade graphite under irradiation. Mater Res Lett 2:43–50CrossRefGoogle Scholar
  28. 28.
    Krishna R, Jones AN, Marsden BJ (2015) Transmission electron microscopy, Raman and X-ray photoelectron spectroscopy studies on neutron irradiated polycrystalline graphite. Radiat Phys Chem 107:121–127CrossRefGoogle Scholar
  29. 29.
    Karthik C, Kane J, Butt DP, Windes WE, Ubic R (2011) In situ transmission electron microscopy of electron-beam induced damage process in nuclear grade graphite. J Nucl Mater 412:321–326CrossRefGoogle Scholar
  30. 30.
    Trevethan T, Dyulgerova P, Latham CD, Heggie MI, Seabourne CR, Scott AJ, Briddon PR, Rayson MJ (2013) Extended interplanar linking in graphite formed from vacancy aggregates. Phys Rev Lett 111:095501-1–095501-5CrossRefGoogle Scholar
  31. 31.
    Trevethan T, Heggie MI (2016) Molecular dynamics simulations of irradiation defects in graphite: single crystal mechanical and thermal properties. Comput Mater Sci 113:60–65CrossRefGoogle Scholar
  32. 32.
    Bacon GE, Warren BE (1956) X-ray diffraction studies of neutron-irradiated graphite. Acta Crystallogr 9:1029–1035CrossRefGoogle Scholar
  33. 33.
    Kelly BT, Marsden BJ, Hall K, Martin DG, Harper A, Blanchard A, Arai T, Burchell T, Haag G, Shtrombakh J (2000) Irradiation damage in graphite due to fast neutrons in fission and fusion systems. International Atomic Energy Agency IAEA-TECDOC-1154Google Scholar
  34. 34.
    Tartz M, Neumann H, Leiter H, Esch J (2005) Pyrolytic graphite and carbon-carbon sputter behavior under xenon ion incidence. In: 29th international electric propulsion conferenceGoogle Scholar
  35. 35.
    Contescu C, Campbell A, Gallego N, Takizawa K, Katoh Y (2017) Mesopores development in irradiated graphite. International Nuclear Graphite Specialists’ MeetingGoogle Scholar
  36. 36.
    Ishiyama S, Burchell TD, Strizak JP, Eto M (1996) The effect of high fluence neutron irradiation on the properties of a fine-grained isotropic nuclear graphite. J Nucl Mater 230:1–7CrossRefGoogle Scholar

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Authors and Affiliations

  1. 1.Shanghai Institute of Applied PhysicsChinese Academy of Sciences (CAS)ShanghaiChina
  2. 2.School of Physics, State Key Laboratory of Crystal Materials, Key Laboratory of Particle Physics and Particle Irradiation (MOE)Shandong UniversityJinanChina
  3. 3.Institute of Modern Physics, Applied Ion Beam Physics LaboratoryFudan UniversityShanghaiChina

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