Fe-26Cr-21Ni-1.8Si 合金の高温酸化挙動に及ぼす Y 添加および合金表面に付着させた Y_2O_3 の影響

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The isothermal and cyclic oxidation behavior of Fe-26%Cr-21%Ni-1.8%Si alloys with and without superficial Y_2O_3 powder application as well as similar alloys containing 0.02% and 0.34%Y was examined in air at 1100℃. The oxide scales on the surface of yttrium-containing alloys consisted of (Cr, Fe)_2O_3, and had excellent adherence to the alloy substrate even in cyclic oxidation. No void formation was observed at the alloyoxide interface, and no silicon-rich inner layer was developed. Such effects of yttrium addition were recognized to be significant even in a fairly early stage of oxidation. The superficially applied Y_2O_3 powder on the alloy improved the scale adherence, and provided the oxidation morphology similar to that of the yttrium-containing alloy. The effect of Y_2O_3 powder was also observed in preoxidized specimens.
社団法人日本鉄鋼協会の論文
1984-02-01