Irradiation effect of swift heavy ion for Zr50Cu 40Al10 bulk glassy alloy

Naoto Onodera, Akito Ishii, Kouji Ishii, Akihiro Iwase, Yoshihiko Yokoyama, Yuichi Saitoh, Norito Ishikawa, Atsushi Yabuuchi, Fuminobu Hori

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


It has been reported that heavy ion irradiation causes softening in some cases of Zr-based bulk metallic glass alloys. However, the fundamental mechanisms of such softening have not been clarified yet. In this study, Zr 50Cu40Al10 bulk glassy alloys were irradiated with heavy ions of 10 MeV I at room temperature. The maximum fluence was 3 × 1014 ions/cm2. The positron annihilation measurements have performed before and after irradiation to investigate changes in free volume. We discuss the relationship between the energy loss and local open volume change after 10 MeV I irradiation compared with those obtained for 200 MeV Xe and 5 MeV Al. The energy loss analysis in ion irradiation for the positron lifetime has revealed that the decreasing trend of positron lifetime is well expressed as a function of total electronic energy deposition rather than total elastic energy deposition. It means that the positron lifetime change by the irradiation has a relationship with the inelastic collisions with electrons during heavy ion irradiation.

Original languageEnglish
Pages (from-to)122-124
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Publication statusPublished - 2013
Externally publishedYes


  • Amorphous
  • Free volume
  • Positron annihilation spectroscopy
  • Radiation damage
  • Stopping power

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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