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Title: Fe-1.5mass%Si合金の高温初期酸化に対する温度と水蒸気の影響
Other Titles: The Effect of Temperature and Water Vapor on the Initial Stage of High Temperature Oxidation of an Fe-1.5mass% Si Alloy
Authors: 福本, 倫久1 Browse this author
前田, 滋2 Browse this author
林, 重成3 Browse this author →KAKEN DB
成田, 敏夫4 Browse this author
Authors(alt): Fukumoto, Michihisa1
Maeda, Shigeru2
Hayashi, Shigenari3
Narita, Toshio4
Keywords: Fe
Fe-Si alloy
high temperature oxidation
effect of water vapor
oxidation kinetics
liquid phase
Issue Date: 1-Aug-2000
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 86
Issue: 8
Start Page: 526
End Page: 533
Publisher DOI: 10.2355/tetsutohagane1955.86.8_526
Abstract: The initial stage of oxidation (up to 600s) in air and air-H2O atmospheres was investigated for Fe and an Fe-1.5mass%Si alloy at 1373 and 1473K. The oxidation kinetics of Fe was parabolic at both 1373 and 1473K and the parabolic rate constants are very similar in both air and air-H2O. For the Fe-1.5Si, at 1373K the oxidation amounts increased rapidly after an incubation period (up to 400s) in air-H2O, while at 1473K oxidation obeyed a linear rate law in both air and air-H2O, because a liquid phase was formed with FeO and Fe2SiO4. The linear rate constants were very similar both in air and in air-H2O. In Pt-marker experiments in air-H2O for Fe-1.5Si it was found that the Pt-marker located between external Fe-oxide and inner FeO+Fe2SiO4 layers at 1373K, while at 1473K the Pt-marker located on the alloy surface. The thickness of each layer was measured as a function of time at 1373K in air-H2O. It was found that after an Si-rich oxide (SiO2+Fe2SiO4) layer at the initial stage of oxidation disappeared, a thick inner FeO+Fe2SiO4 layer formed, accompanied by the formation of Fe3O4inside the outer Fe2O3 scale. Rapid oxidation after 400s proceeded with the growth of an FeO layer in the surface scale. The change of the Si-rich oxide layer to an FeO+Fe2SiO4 mixture is due to penetration of water molecules. A combined process of perforating dissociation and transport of water molecules was suggested to be the cause of the rapid growth of the inner layer.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 林 重成

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