Fe-0.5および5mass%Ni合金の1273K, 空気酸化に対する水蒸気の影響 Effect of Water Vapor on the Oxidation Behavior of Fe-0.5 and 5 mass%Ni Alloys in Air at 1273 K

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著者

    • 福本 倫久 FUKUMOTO Michihisa
    • 北海道大学大学院工学研究科界面制御工学講座 Research Group of Interface Control Engineering, Graduate School of Engineering, Hokkaido University
    • 林 重成 HAYASHI Shigenari
    • 北海道大学大学院工学研究科界面制御工学講座 Research Group of Interface Control Engineering, Graduate School of Engineering, Hokkaido University
    • 成田 敏夫 NARITA Toshio
    • 北海道大学大学院工学研究科界面制御工学講座 Research Group of Interface Control Engineering, Graduate School of Engineering, Hokkaido University

抄録

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%H<SUB>2</SUB>O(air-10.5H<SUB>2</SUB>O). In the air-10.5H<SUB>2</SUB>O, 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-10.5H<SUB>2</SUB>O 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-10.5H<SUB>2</SUB>O, but the Ni-concentration of the 5Ni oxidized in air was higher than that in air-10.5H<SUB>2</SUB>O.

収録刊行物

  • 日本金屬學會誌

    日本金屬學會誌 66(5), 513-520, 2002-05-20

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10008833198
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    6179169
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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