Amorphization of graphite under ion or electron irradiation

Hiroaki Abe, Hiroshi Naramoto, Chiken Kinoshita

Research output: Contribution to journalConference articlepeer-review

18 Citations (Scopus)


A transmission electron microscope interfaced with ion accelerators (TEM-Accelerator Facility) in JAERI-Takasaki has been used to get insights into the irradiation-induced amorphization of highly-oriented pyrolytic graphite. Amorphization is induced through lattice disorder under irradiation with electrons or ions at room temperature. The displacement threshold energy is determined as 27 eV and 28 eV from the electron-energy dependence of the amorphization fluence at room temperature and 373 K, respectively. The amorphization fluences in dpa are almost identical for irradiation with various kinds of ions within the experimental error. It indicates the thermal spikes do not have an important role for the amorphization over the energy density between 10-4 to 10-2 eV/atom.

Original languageEnglish
Pages (from-to)383-388
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1995 Jan 1
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: 1994 Nov 281994 Nov 30

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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