Reactions between Liquid Metal-Oxygen Alloys and Solid Oxides

Taimatsu Hitoshi, Undo Yoshikatsu, Nakatani Fumitada, Ogino Kazumi

doi:10.2320/jinstmet1952.50.6_568

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Other Title

溶融金属-酸素合金と固体酸化物間の反応
ヨウユウキンゾクサンソゴウキントコタイサンカブツカンノハンノウ

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The following reactions have been studied at 1823 K in CO-CO₂ mixtures: reactions between liquid Ni-Co-O or Ni-Fe-O alloys and Al₂O₃ to form spinel-type double oxides as reaction layers, and reactions between liquid Ni-Co-O or Ni-Fe-O alloys and MgO to form continuous diffusion layers in the solid oxides. The kinetics for the formation of aluminate spinels obeyed the parabolic rate law. The rate of formation of NiAl₂O₄ in the reaction between liquid Ni-O alloy and Al₂O₃ was in agreement with the reported values obtained in the solid-state reaction between NiO and Al₂O₃. The concentration of metal ions was regulated at the MgO surface in contact with the liquid alloys by the oxygen partial pressure, and the flux of metal ions which diffused into the MgO was increased with increasing oxygen partial pressure. Comparison of the results from this study with previous researches into solid-state reactions between oxides suggests that the counterdiffusion of cations through a reaction layer is rate controlling.

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Journal of the Japan Institute of Metals and Materials

Journal of the Japan Institute of Metals and Materials 50 (6), 568-575, 1986

The Japan Institute of Metals and Materials

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