Improved responsivity and sensitivity of hydrogen mapping technique in pure iron using WO3 thin film by control of Pd intermediate layer

Sugawara Yu, Saito Haruka

研究成果: Article査読

抄録

The objective in this study is to improve the responsivity and the sensitivity of the hydrogen mapping technique using the WO3 thin film by the optimization of the Pd intermediate layer. Especially, the effect of the thickness of Pd on the responsivity and the sensitivity of the hydrogen detection during hydrogen charging was investigated. Pd and WO3 thin films were coated on the detection side of the pure iron sheet by a magnetron sputtering system. No color change was observed on the hydrogen detection side of the specimens with the Pd intermediate layer more than 25 nm in thickness during the hydrogen detection test for 7.2 ks. The responsivity for the hydrogen mapping technique using WO3 was essentially improved by decreasing the Pd thickness. In terms of the onset time of the average color change, the earliest response was obtained when the Pd thickness was 4 nm because of the uneven distribution of the color change in the case of the Pd thickness of 2.5 nm. The sensitivity for the hydrogen mapping technique using WO3 was improved by decreasing the Pd thickness. Taking into account the responsivity, the sensitivity, and the spatial resolution comprehensively, the best thickness of the Pd intermediate layer seems to be 4 nm in this study.

本文言語English
ページ(範囲)1201-1208
ページ数8
ジャーナルIsij International
61
4
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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