Wettability of Al2O3 substrate by liquid iron. Effects of oxygen in liquid iron and purity of Al2O3 substrate

Kunihiko Nakashima, Kenji Takihira, Katsumi Mori, Nobuya Shinozaki

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Abstract

The interfacial properties between liquid Fe-O alloy and alumina substrates with different purities, 99.9% and 96%Al2O3, were measured by the sessile drop method. The interfaces of samples after the experiment were examined by SEM and EPMA. It was found that the contact angle increased and the work of adhesion decreased with increasing oxygen concentration in the iron in the range of less than 0.010%. These phenomena were attributed to the dessociation of Al2O3. For 96%Al2O3, the Ca and Mg rich layer was observed at the Fe-Al2O3 interface. Whereas, at higher oxygen concentrations, the contact angle decreased with increasing oxygen concentration. Under these conditions, the formation of the hercynite or the penetration of iron into the grain boundaries of Al2O3 substrates were observed.

Original languageEnglish
Pages (from-to)1199-1206
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume55
Issue number11
DOIs
Publication statusPublished - Jan 1 1991

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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