Composition and structure of the Cu/MgO {222} heterophase interface on an atomic scale

H. Jang*, David N Seidman, K. L. Merkle

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The chemical composition and structure of the Cu/MgO {222} heterophase interface is studied using a combination of transmission electron microscopy, high resolution electron microscopy and atom-probe field-ion microscopy techniques. Cu/MgO {222} interfaces are produced by forming MgO precipitates in a Cu matrix by internally oxidizing a Cu-2.8 at.% Mg alloy. The MgO precipitates have a semicoherent interface with the Cu matrix and they exhibit a cube-on-cube orientation relationship. The octahedrally-shaped MgO precipitates were analyzed using APFIM by dissecting along a 〈111〉 direction on an atomic scale. In this manner an MgO precipitate, with a {222} plane perpendicular to the axis of the APFIM, is uncovered after the Cu matrix has been mass analyzed. It is found that the terminating {222} plane of an MgO precipitate is pure oxygen, and the second {222} plane is pure Mg.

Original languageEnglish (US)
Pages (from-to)397-400
Number of pages4
JournalMaterials Science Forum
Volume155-5
StatePublished - Dec 1 1994

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Precipitates
precipitates
Chemical analysis
matrices
High resolution electron microscopy
stopping
electron microscopy
Microscopic examination
chemical composition
Ions
Oxygen
Transmission electron microscopy
microscopy
Atoms
transmission electron microscopy
probes
high resolution
oxygen
atoms
ions

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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abstract = "The chemical composition and structure of the Cu/MgO {222} heterophase interface is studied using a combination of transmission electron microscopy, high resolution electron microscopy and atom-probe field-ion microscopy techniques. Cu/MgO {222} interfaces are produced by forming MgO precipitates in a Cu matrix by internally oxidizing a Cu-2.8 at.{\%} Mg alloy. The MgO precipitates have a semicoherent interface with the Cu matrix and they exhibit a cube-on-cube orientation relationship. The octahedrally-shaped MgO precipitates were analyzed using APFIM by dissecting along a 〈111〉 direction on an atomic scale. In this manner an MgO precipitate, with a {222} plane perpendicular to the axis of the APFIM, is uncovered after the Cu matrix has been mass analyzed. It is found that the terminating {222} plane of an MgO precipitate is pure oxygen, and the second {222} plane is pure Mg.",
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Composition and structure of the Cu/MgO {222} heterophase interface on an atomic scale. / Jang, H.; Seidman, David N; Merkle, K. L.

In: Materials Science Forum, Vol. 155-5, 01.12.1994, p. 397-400.

Research output: Contribution to journalArticle

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