Complex Oxide Layer at a Nickel/Steel Interface Bonded under a Moderate Vacuum Condition
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概要
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Microstructures of a nickel/austenitic-steel (AISI304) interface, which has been bonded through in-situ cold-rolling of clean surfaces (pre-sputtered by argon ion) within a vacuum apparatus (~10–3 Pa), then followed by an annealing at 500°C, are investigated by transmission electron microscopy. We frequently find significant traces of thin oxide layers of 5–10 nm in thickness, which commonly reveal complex microstructures composed of bi-layers of different types of oxides. Origin of such interface oxides is presumably due to a slight oxygen contamination of the sputtered-surface in the present moderate vacuum condition, and the oxide precipitation at the bonded-interface has been promoted during annealing. Concerning that the strength of the present Ni/steel cold-rolled interface remarkably increases during an early stage of the annealing at 500°C, it is concluded that their strong interface bonding is supported both by nanometeric oxide-layers as well as direct metal/metal contacts.
- 2011-11-15
著者
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Hara T
Steel Research Center National Institute For Materials Science
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Hara T
National Inst. For Materials Sci. Tsukuba Jpn
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Hara Toru
Department Of Materials Science And Engineering Teikyo University
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Hara Toru
National Institute For Materials Science
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Hara Toru
National Institute For Material Science
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Abe Eiji
Department Of Materials Engineering The University Of Tokyo
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Abe Eiji
Dep. Of Materials Sci. & Engineering The Univ. Of Tokyo
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Hayashi Taisuke
Dep. Of Materials Sci. & Engineering The Univ. Of Tokyo
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Hayashi Taisuke
Department Of Materials Analysis Cirs Shimane University
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