Study of ultrafine Cu precipitates in neutron-irradiated Fe utilizing positron quantum-dot-like states

Y. Nagai, M. Hasegawa, Z. Tang, T. Kanai, M. Saneyasu

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Ultrafine Cu precipitates in neutron-irradiated Fe-0.3wt%Cu model alloys are studied by positron lifetime and coincidence Doppler broadening of positron annihilation radiation. We found that irradiation-induced vacancies bound with Cu solute atoms make aggregations to form vacancy clusters (microvoids) and the inner surfaces of the microvoids are mostly coated with Cu atoms. The microvoids recover by post-irradiation annealing up to 400°C. However, the Cu aggregations survive up to higher temperatures as defect-free ultrafine Cu precipitates.

Original languageEnglish
Pages (from-to)91-93
Number of pages3
JournalMaterials Science Forum
Volume363-365
DOIs
Publication statusPublished - 2001 Jan 1
Event12th International Conference on Positron Annihilation - Munchen, Germany
Duration: 2000 Aug 62000 Aug 12

Keywords

  • Coincidence Doppler broadening
  • Irradiation induced precipitation
  • Positron trapping
  • Ultrafine precipitates

ASJC Scopus subject areas

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

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