Impact of annealing on deuterium retention behavior in damaged W

Shodai Sakurada, Yuki Uemura, Hiroe Fujita, Keisuke Azuma, Takeshi Toyama, Naoaki Yoshida, Tatsuya Hinoki, Sosuke Kondo, Yuji Hatano, Masashi Shimada, Dean Buchenauer, Takumi Chikada, Yasuhisa Oya

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The annealing effects on deuterium (D) retention for 0.1-1.0 dpa iron (Fe) ion damaged W were studied as a function of annealing duration. The D2 spectra for Fe damaged W with lower defect concentration showed that D trapped by vacancy clusters was clearly decreased as increasing annealing duration due to the recovery of vacancy clusters. On the other hand, at higher defect concentration, the desorption peak of D trapped by voids was shifted toward higher temperature side, which would be caused by aggregation of vacancies and vacancy clusters. It can be said that the recovery and aggregation behavior of defects are controlled by defect concentration. By disappearing of desorption of D trapped by vacancy clusters after annealing for longer duration, the desorption of D trapped by vacancies was increased, which could be explained by following two possibilities. One is that the retention of hydrogen isotope trapped by monovacancy was increased. The other is that number of vacancies during annihilation process of vacancy cluster were formed by annealing.

Original languageEnglish
Pages (from-to)785-788
Number of pages4
JournalFusion Science and Technology
Volume72
Issue number4
DOIs
Publication statusPublished - 2017 Nov

Keywords

  • Annealing
  • Heavy-ion irradiation
  • Hydrogen isotopes retention
  • Tungsten

ASJC Scopus subject areas

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

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