Si-rich phases and their distributions in the oxide scale formed on 304 stainless steel at high temperatures

Lichun Zheng, Kazuya Hosoi, Shigeru Ueda, Xu Gao, Shin ya Kitamura, Yoshinao Kobayashi

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Si-rich phases and their distributions in the oxide scale formed on 304 stainless steel (304SS) kinetically affects SiO2 volatilization for the formation of silicate-based Cs-bearing microparticles released during the Fukushima Daiichi Nuclear Power Plant accident. Therefore, we investigated Si-rich phases and their distributions in the oxide scale on 304SS oxidized in H2O–H2 mixtures over the temperature range 1000–1300 °C. SiO2 film stays at the base of the Cr2O3-type scale formed at low temperatures or high H2 contents in steam. Fe2SiO2 phase is non-uniformly distributed in the spinel-type scale formed under opposite conditions. Fe2SiO2 accumulation in the spinel-type scale is attributed to its thermodynamically metastable state in H2O–H2 mixtures. With increasing oxidation time, Fe2SiO2 phase was further oxidized into SiO2 phase.

本文言語English
ページ(範囲)327-338
ページ数12
ジャーナルJournal of Nuclear Materials
507
DOI
出版ステータスPublished - 2018 8 15

ASJC Scopus subject areas

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

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