Deuterium retention in VPS-W coated vanadium alloy (V-4Cr-4Ti)

Yoshio Ueda, Kazuhiro Uekita, Makoto Oya, Yusuke Ohtsuka, Takuya Nagasaka, Ryuta Kasada, Akihiko Kimura, Tomonori Tokunaga, Naoaki Yoshida

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Abstract

D retention in a VPS W coated V alloy (V-4Cr-4Ti, NIFS Heat 2) was investigated by an ion beam irradiation with a HiFIT device. Irradiation temperature changed from 473 K to 773 K and ion fluence was 1024 m 2. In addition, during ion irradiation atmospheric pressure was 0.5 mTorr. It was found that ambient gas absorption was the dominant process for D retention. Ion irradiation could enhance gas absorption probably due to surface modification (oxide layer removal) and could produce ion induced trapping sites. Although these ion induced processes can be avoided by W coating layers, D retention is still significant for VPS-W coated V alloy. D trapping could be done mainly in V-alloy and its mechanisms could be related to some intrinsic defects in V alloy and formation of titanium hydride at elevated temperature.

Original languageEnglish
Pages (from-to)S1125-S1128
JournalJournal of Nuclear Materials
Volume438
Issue numberSUPPL
DOIs
Publication statusPublished - Jan 1 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

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

Cite this

Ueda, Y., Uekita, K., Oya, M., Ohtsuka, Y., Nagasaka, T., Kasada, R., ... Yoshida, N. (2013). Deuterium retention in VPS-W coated vanadium alloy (V-4Cr-4Ti). Journal of Nuclear Materials, 438(SUPPL), S1125-S1128. https://doi.org/10.1016/j.jnucmat.2013.01.248