Ni-Cr基合金の高温酸化におよぼすAlの影響

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  • 西 義
    防衛庁技術研究本部第一研究所

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タイトル別名
  • Effects of Addition of Aluminum on the High-Temperature Oxidation of Ni-Cr-Base Alloys
  • Ni-Crキ ゴウキン ノ コウオン サンカ ニ オヨボス Al ノ エイキョウ

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Studies were made on the oxidation behavior of Ni-Cr-Mo-Al, Ni-Cr-Co-Mo-Al, Ni-Cr-Al, Ni-Cr-Fe-Al and Ni-Cr-Co-Al alloys containing about 19∼20% chromium. The weight losses due to the oxidation was measured, and the oxides composing the thin oxide films and the scales were identified by electron and X-ray diffraction methods, respectively. The following results have been obtained. (1) Addition of aluminum hinders the formation of NiOMoO3 in the scales of Ni-Cr-Mo alloys and decreases the weight loss due to scaling on them. The formation of molten phase of NiOMoO3 is retarded by aluminium addition at the temperature of oxidation resistance limit of Ni-Cr-Mo alloys. A similar effect of aluminium addition was observed in the scales of Ni-Cr-Co-Mo-Al alloy. (2) The formation of the oxide with spinel type structure and NiO is retarded in the scales of Ni-Cr-Al and Ni-Cr-Fe-Al alloys in the temperature range from 850° to 1300°C. The same behavior is observed in the scales of Ni-Cr-Co-Al alloy at a temperature as high as 1300°C.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 26 (6), 380-386, 1962

    公益社団法人 日本金属学会

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