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Fe-0.5および5 mass%Ni合金の1273 K,空気酸化に対する水蒸気の影響

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J. Jpn Inst. Met. Mater. 66(5) 513.pdf1.6 MBPDFView/Open
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Title: Fe-0.5および5 mass%Ni合金の1273 K,空気酸化に対する水蒸気の影響
Other Titles: Effect of Water Vapor on the Oxidation Behavior of Fe-0.5 and 5 mass%Ni Alloys in Air at 1273 K
Authors: 福本, 倫久1 Browse this author
林, 重成2 Browse this author →KAKEN DB
前田, 滋3 Browse this author
成田, 敏夫4 Browse this author
Authors(alt): Fukumoto, Michihisa1
Hayashi, Shigenari2
Maeda, Shigeru3
Narita, Toshio4
Keywords: iron-nickel alloy
high temperature oxidation
effecto of water vapor
oxidation kinetics
inner layer
Issue Date: May-2002
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 66
Issue: 5
Start Page: 513
End Page: 520
Publisher DOI: 10.2320/jinstmet1952.66.5_513
Abstract: Oxidation behavior of Fe-0.5 and 5 mass%Ni alloys(0.5Ni, 5Ni) as well as Fe for comparison, was investigated at 1273 K for up to 7.2 ks in air and air containing 10.5 vol%H2O(air-10.5H2O). In the air-10.5H2O, the 0.5Ni and 5Ni were oxidized faster than in air. The scale was composed of a duplex structure, an outer Fe-oxides layer and an inner FeO+Ni layer containing voids. Marker experiments with a small Pt wire were carried out for the 5Ni oxidized in air and the Pt-marker was located between the inner and outer layers, suggesting that the inner layer grows due to inward migration of oxygen and the outer layer due to outward iron diffusion. A similar scale structure was observed for the 5Ni oxidized in air but the inner layer thickness of the 5Ni oxidized in air-10.5H2O was thicker than in air. Oxygen in the inner FeO+Ni layer formed in air was supplied by the dissociation of outer Fe-oxides, leaving voids there, probably by the perforating dissociation mechanism. Both oxygen and water molecules could be diffusing species through the void in the atmosphere containing water vapor. Concentration profiles of each element indicated that concentration of Ni was increased at the scale/alloy interface. The Ni-concentration of the 0.5Ni oxidized in air was lower than that in air-10.5H2O, but the Ni-concentration of the 5Ni oxidized in air was higher than that in air-10.5H2O.
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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