Identification of the nature of small point defect clusters in neutron irradiated Fe-16Ni-15Cr by means of electron irradiation

M. Horiki, S. Arai, Y. Satoh, M. Kiritani

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16 Citations (Scopus)

Abstract

The nature of very small point defect clusters in Fe-16Ni-15Cr irradiated with fission neutrons was identified from their behavior under electron irradiation with a high voltage electron microscope. In this analysis, the defect clusters which grew during electron irradiation were judged to be of interstitial (I)-type and those which shrank or disappeared to be of vacancy (V)-type. The fraction of the number of I- and V-type defect clusters in a specimen irradiated as a bulk at 353 K were found to be 7% and 93%, respectively. In a specimen irradiated at 623 K as a bulk, most of defect clusters were I-type with a very small fraction of V-type. In a thin foil specimen irradiated at 573 K, the fraction of I-type defect clusters increased from 20% near the thin specimen edge to 70% at a thicker part of 120 nm. These results were consistent with those in the previous judgement from the shape and contrast of transmission electron microscope image.

Original languageEnglish
Pages (from-to)165-173
Number of pages9
JournalJournal of Nuclear Materials
Volume255
Issue number2-3
DOIs
Publication statusPublished - 1998 Jun

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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