Fe-SiおよびFe-Si-Al合金の高温酸化被膜

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タイトル別名
  • On Oxide Films of Fe-Si and Fe-Si-Al Alloys at High Temperature
  • Fe-Si オヨビ Fe-Si-Al ゴウキン ノ コウオン サンカ ヒマク

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抄録

The present authors made observation on oxide films and scales produced on the surface layers of Fe-Si alloys (ca. 1∼6%Si) and Fe-Si-Al alloys (ca. 1∼6%Si-1∼6%Al), when the alloys came into contact with air at high temperatures (700∼1200°) by using the transmission electron diffraction and X-ray diffraction methods. Thereby the authors detected the special heat-resisting films consisting of amorphous oxides or fine Al2O3 crystals which were formed on the surfaces of Fe-Si and Fe-Si-Al alloys in the earliest stage of oxidation at 700°C and 1000°C (Table 1). The amorphous oxide films produced on the alloys at 700°C for 5 min and 1000°C for 2 min changed into α-cristobalite crystals by reheating the films at 1200°C for 3 hr. The present studies also clarified experimentally that SiO2 (α-quartz, α-cristobalite and α-tridymite, and Fe2SiO4 crystal layers are formed inside the iron oxide scales on the surfaces of Fe-Si alloys oxidized in air at 1100°C and 1200°C (Table 2).

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (9), 534-538, 1959

    公益社団法人 日本金属学会

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