Change of chemical states of niobium in the oxide layer of zirconium-niobium alloys with oxide growth

Kan Sakamoto; Katsumi Une; Masaki Aomi; Teppei Otsuka; Kenichi Hashizume

doi:10.1080/00223131.2015.1058196

Change of chemical states of niobium in the oxide layer of zirconium-niobium alloys with oxide growth

Kan Sakamoto, Katsumi Une, Masaki Aomi, Teppei Otsuka, Kenichi Hashizume

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The change of chemical states of niobium with oxide growth was examined in the oxide layers of Zr-2.5Nb around the first kinetic transition by the conversion electron yield -X-ray absorption near-edge structure measurements. The detailed depth profiles of niobium chemical states were obtained in both the pre-and the post-transition oxide layers of Zr-2.5Nb formed in water at 663 K for 40-280 d. The depth profiling revealed that the inner oxide layer remained protective to oxidizing species even though in the post-transition region and this excellent stability of barrierness would be attributed the suppression of hydrogen pickup.

Original language	English
Pages (from-to)	1259-1264
Number of pages	6
Journal	journal of nuclear science and technology
Volume	52
Issue number	10
DOIs	https://doi.org/10.1080/00223131.2015.1058196
Publication status	Published - Oct 3 2015

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Nuclear Energy and Engineering

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abstract = "The change of chemical states of niobium with oxide growth was examined in the oxide layers of Zr-2.5Nb around the first kinetic transition by the conversion electron yield -X-ray absorption near-edge structure measurements. The detailed depth profiles of niobium chemical states were obtained in both the pre-and the post-transition oxide layers of Zr-2.5Nb formed in water at 663 K for 40-280 d. The depth profiling revealed that the inner oxide layer remained protective to oxidizing species even though in the post-transition region and this excellent stability of barrierness would be attributed the suppression of hydrogen pickup.",

author = "Kan Sakamoto and Katsumi Une and Masaki Aomi and Teppei Otsuka and Kenichi Hashizume",

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AU - Sakamoto, Kan

AU - Une, Katsumi

AU - Aomi, Masaki

AU - Otsuka, Teppei

AU - Hashizume, Kenichi

PY - 2015/10/3

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N2 - The change of chemical states of niobium with oxide growth was examined in the oxide layers of Zr-2.5Nb around the first kinetic transition by the conversion electron yield -X-ray absorption near-edge structure measurements. The detailed depth profiles of niobium chemical states were obtained in both the pre-and the post-transition oxide layers of Zr-2.5Nb formed in water at 663 K for 40-280 d. The depth profiling revealed that the inner oxide layer remained protective to oxidizing species even though in the post-transition region and this excellent stability of barrierness would be attributed the suppression of hydrogen pickup.

AB - The change of chemical states of niobium with oxide growth was examined in the oxide layers of Zr-2.5Nb around the first kinetic transition by the conversion electron yield -X-ray absorption near-edge structure measurements. The detailed depth profiles of niobium chemical states were obtained in both the pre-and the post-transition oxide layers of Zr-2.5Nb formed in water at 663 K for 40-280 d. The depth profiling revealed that the inner oxide layer remained protective to oxidizing species even though in the post-transition region and this excellent stability of barrierness would be attributed the suppression of hydrogen pickup.

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