Correlation of High-temperature Steam Oxidation with Hydrogen Dissolution in Pure Iron and Ternary High-chromium Ferritic Steel
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概要
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The high-temperature oxidation in both air and steam was examined experimentally with pure iron and a Fe-10Cr-0.08C (mass%) ternary ferritic steel. In case of pure iron, the thickness of the oxide scale formed in steam at 923 K for 360 ks was comparable to that of the scale formed in air. On the other hand, in case of the ternary ferritic steel, the oxide scale formed was much thicker in steam than in air. Thus, the oxidation rate was nearly independent of the air and the steam atmosphere for pure iron, but was dependent for the ternary ferritic steel. In the present study, this difference was investigated from a viewpoint of the hydrogen dissolution in the oxide scale during the steam oxidation. The amount of dissolved hydrogen was measured using a thermal desorption spectroscopy (TDS). It was found that the amount of the dissolved hydrogen was much larger in the ternary ferritic steel than in pure iron. Also, it was shown that the hydrogen dissolution in the ternary ferritic steel was related to the presence of (Fe,Cr)3O4 in the oxide scale. The defect structure in this chromium-rich oxide was modified by hydrogen dissolution, so that the ionic diffusion could be enhanced in it, resulting in the more accelerated oxidation rate in steam.
- 社団法人 日本鉄鋼協会の論文
- 2005-07-15
著者
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森永 正彦
名古屋大学大学院工学研究科マテリアル理工学専攻
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村田 純教
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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森永 正彦
豊橋技科大
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Murata Yoshinori
Department Of Geriatric Dentistry Osaka Dental University
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MORINAGA Masahiko
Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University
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森永 正彦
名古屋大学大学院工学研究科材料機能工学専攻
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KANNO Motohiro
Department of Materials Science, School of Engineering, The University of Tokyo
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Murata Yoshinori
Department Of Applied Biological Chemistry Faculty Of Agriculture Osaka Prefecture University:(prese
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Morinaga Masahiko
Toyohashi University Of Technology
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Morinaga Masahiko
Department Of Materals Science And Engineering Graduate School Of Engineering Nagoya University
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NAKAI Masaaki
Nagoya University
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NAGAI Kensuke
Nagoya University
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MATSUDA Shigeaki
University of Tokyo
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MATSUDA Shigeaki
Department of Materials Engineering, School of Engineering, The University of Tokyo
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Nagai Kosuke
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Kanno M
Department Of Materials Engineering School Of Engineering The University Of Tokyo
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Kanno Motohiro
Department Of Materials Engineering School Of Engineering The University Of Tokyo
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Murata Yoshinori
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Nakai Masaaki
Department Of Materials Science And Engineering Graduate School Of Engineering Nagoya University
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Mogi Masato
Nissan Arc Ltd.
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Matsuda Shigeaki
Department Of Materials Engineering School Of Engineering The University Of Tokyo
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