論文

査読有り
2017年11月1日

Erosion and morphology changes of F82H steel under simultaneous hydrogen and helium irradiation

Fusion Engineering and Design
  • K. Yakushiji
  • ,
  • H. T. Lee
  • ,
  • M. Oya
  • ,
  • M. Tokitani
  • ,
  • A. Sagara
  • ,
  • Y. Hamaji
  • ,
  • K. Uenishi
  • ,
  • K. Ibano
  • ,
  • Y. Ueda

124
開始ページ
356
終了ページ
359
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.fusengdes.2017.03.045
出版者・発行元
Elsevier Ltd

The use of bare Reduced Activation Ferritic Martensitic (RAFM) steels has been proposed for the first wall in a fusion reactor. Thus, it is necessary to understand the erosion and surface morphology changes under direct and simultaneous hydrogen and helium implantation of RAFM steels under fusion-relevant condition. Experiments were performed at ion energies of ∼1 keV over the temperature range of 500–900 K, consistent with the anticipated operating conditions of the blanket region. The irradiation fluence was 1 × 1024 m−2 and the He% in the ion beam was 0.5%. Mass loss was measured before and after irradiation to determine erosion. Surface morphology changes were observed by SEM/FIB. RBS was used to quantify the near surface W concentration. From SEM images, surface roughening was observed at T &gt
750 K and complex surface structures formed with peak-to-peak variation in the ∼μm range. Mass loss increased with increasing surface roughening but the loss for simultaneous hydrogen-helium case was systematically higher compared to hydrogen-only case. A corresponding lower surface W concentration was measured for the simultaneous case, indicating Helium has an important role in W surface enrichment process.

リンク情報
DOI
https://doi.org/10.1016/j.fusengdes.2017.03.045
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85016509936&origin=inward

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