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Study of Aluminum–Oxygen Binary Systems: Determination of Partial Interatomic Distances

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Abstract

This paper reports on an Auger-electron study of the oxidation of the perfect surface of polycrystalline Al in residual gas atmosphere at a partial pressure of oxygen of 10 -10 torr. Under supervacuum conditions, layer-by-layer oxidation of the aluminum surface takes place along with stabilization of the chemical composition of the oxide film. Oxygen can penetrate into the oxidation region not only by deposition from the residual atmosphere but also by other mechanisms. After the chemical composition of the oxide film was stabilized, its local atomic structure was studied by Al and O K-edge extended electron energy loss fine structure (EELFS) spectroscopy. The estimated partial interatomic distances for Al–Al, Al–O, O–Al, and O–O atomic pairs permitted us to conclude that an oxide-like phase is formed in the subsurface layers of aluminum oxidized under supervacuum conditions and to construct a model of the local atomic structure of this oxide-like phase.

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Authors
  1. V. A. Shamin
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  2. A. N. Maratkanova
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  3. Yu. V. Ratz
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Shamin, V.A., Maratkanova, A.N. & Ratz, Y.V. Study of Aluminum–Oxygen Binary Systems: Determination of Partial Interatomic Distances. Journal of Structural Chemistry 41, 972–976 (2000). https://doi.org/10.1023/A:1010354822331

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  • DOI: https://doi.org/10.1023/A:1010354822331

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