Identification of the nature of neutron-irradiation-induced small point defect clusters in nickel by means of electron irradiation and defect structure development from collision cascade

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

研究成果: Article査読

9 被引用数 (Scopus)

抄録

In order to identify the nature of small point defect clusters produced from cascade collisions, either made of interstitials or vacancies, an effective method is introduced in which the identification is made from the behavior of defects under electron irradiation. Material investigated is nickel neutron-irradiated with several facilities. Under electron irradiation, neutron-irradiation-induced defects having stacking fault tetrahedron (SFT) contrast shrank and disappeared, others having dislocation loop contrast grew. Majority of extremely small defects (≤ 1 nm), over 3/4 of all the defect clusters (bulk, 300 K) and about 95% of all the defect clusters (thin foil, 573 K), disappeared and are clarified to be of vacancy type. The size and spatial distributions of defect clusters, in foil specimens and comparison of defect structures in thin foils with those in bulk disclosed the role of freely migrating interstitials.

本文言語English
ページ(範囲)287-308
ページ数22
ジャーナルRadiation Effects and Defects in Solids
139
4
DOI
出版ステータスPublished - 1996

ASJC Scopus subject areas

  • 放射線
  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 凝縮系物理学

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