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

doi:10.1016/j.jnucmat.2013.01.248

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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4 Citations (Scopus)

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 language	English
Pages (from-to)	S1125-S1128
Journal	Journal of Nuclear Materials
Volume	438
Issue number	SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.248
Publication status	Published - Jan 1 2013
Externally published	Yes

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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

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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.",

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

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AU - Ueda, Yoshio

AU - Uekita, Kazuhiro

AU - Oya, Makoto

AU - Ohtsuka, Yusuke

AU - Nagasaka, Takuya

AU - Kasada, Ryuta

AU - Kimura, Akihiko

AU - Tokunaga, Tomonori

AU - Yoshida, Naoaki

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AB - 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.

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10.1016/j.jnucmat.2013.01.248