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Solid-State Reactions of a 3D-Transition Metal-Ti/Al2O3 System

  • Seiichi Suenaga (a1), Miho Koyama (a1), Shinji Arai (a1) and Masako Nakahashi (a1)

Abstract

An interfacial mechanism for reactions between a Me-Ti thin film (Me=3d transition metals; Cu,Ni) and an A12O3 substrate is newly proposed. It has been clarified that Me3Ti3O (diamond cubic of Fd3m), which is formed as an intermediate phase in both the Cu-Ti/Al2O3 and Ni-Ti/Al2O3 systems, is responsible for the bonding between Me and A12O3. The solid-state reactions of the Me-Ti bilayer film/Al2O3 system were studied with Auger electron spectroscopy (AES) and X-ray diffraction (XRD) to clarify the interfacial reaction between Me-Ti and the A12O3 substrate. Me3Ti3O was observed at the interface between A12O3 and Me after annealing. Me3Ti3O was formed by oxidation of the Me-Ti compounds. The oxygen which reacted with the Me-Ti compounds has been found to be generated from the reduction of the A12O3 substrate.

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1 Suenaga, S., Koyama, M., Arai, S., and Nakahashi, M., J.Mater.Res. 8, 1805(1993).
2 Koyama, M., Arai, S., Suenaga, S., and Nakahashi, M., J.Mater.Sci. 28, 830(1993).
3 Karlsson, N., Nature 168, 558(1951).
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6 Santella, M. L., Horton, J.A., and Pak, J.J., J.Am.Ceram.Soc.73, 1785(1991).

Solid-State Reactions of a 3D-Transition Metal-Ti/Al2O3 System

  • Seiichi Suenaga (a1), Miho Koyama (a1), Shinji Arai (a1) and Masako Nakahashi (a1)

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