Wettability of Al2O3 Substrate by Liquid Iron—Effects of Oxygen in Liquid Iron and Purity of Al2O3 Substrate—

Kunihiko Nakashima, Katsumi Mori, Kenji Takihira, Nobuya Shinozaki

研究成果: ジャーナルへの寄稿記事

34 引用 (Scopus)

抄録

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 were examined by SEM and EPMA after the experiment. It was found that the surface tension decreased with increasing oxygen concentration in the iron for both substrates. The contact angle of 99.9% Al2O3 abruptly increased with increasing oxygen concentration at lower oxygen concentrations. These phenomena were attributed to the dissociation of Al2O3. Moreover, at higher oxygen concentration, the formation of the dense hercynite was observed at the Fe-O/Al2O3 interface, the contact angle slightly decreased with increasing oxygen concentration. For 96% Al2O3, a Ca- or Mg-rich layer was observed at the interface at a lower oxygen concentration, the contact angle abruptly increased with increasing oxygen concentration. Whereas, at higher oxygen concentrations, the contact angle rapidly decreased with increasing oxygen concentration. Under these conditions, the formation of hercynite and the penetration of iron into the grain boundaries of Al2O3 substrates were observed.

元の言語英語
ページ(範囲)918-926
ページ数9
ジャーナルMaterials Transactions, JIM
33
発行部数10
DOI
出版物ステータス出版済み - 1 1 1992

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wettability
Wetting
purity
Iron
Oxygen
iron
Liquids
oxygen
Substrates
liquids
Contact angle
Aluminum Oxide
Electron probe microanalysis
Surface tension
interfacial tension
Grain boundaries
Alumina
penetration
grain boundaries
aluminum oxides

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Wettability of Al2O3 Substrate by Liquid Iron—Effects of Oxygen in Liquid Iron and Purity of Al2O3 Substrate—. / Nakashima, Kunihiko; Mori, Katsumi; Takihira, Kenji; Shinozaki, Nobuya.

:: Materials Transactions, JIM, 巻 33, 番号 10, 01.01.1992, p. 918-926.

研究成果: ジャーナルへの寄稿記事

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