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Amorphization of Graphite Under ion or Electron Irradiation

Published online by Cambridge University Press:  16 February 2011

Hiroaki Abe ,
Hiroshi Naramoto  and
Chiken Kinoshita
Hiroaki Abe
Affiliation:
Department of Materials Development, Japan Atomic Energy Research Institute -Takasaki, Watanuki 1233, Takasaki
Hiroshi Naramoto
Affiliation:
Department of Materials Development, Japan Atomic Energy Research Institute -Takasaki, Watanuki 1233, Takasaki
Chiken Kinoshita
Affiliation:
Department of Nuclear Engineering, Kyushu University36, Fukuoka 812, Japan
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Abstract

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 highlyoriented 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994 , 383
Copyright
Copyright © Materials Research Society 1995

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References

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