Three-dimensional Investigation of Ceramic/Metal Heterophase Interfaces by Atom-probe Microscopy

Järg Rüsing; Jason T. Sebastian; Olof C. Hellman; David N. Seidman

doi:10.1007/S100050010050

Abstract

The results of a three-dimensional atom probe (3DAP) analysis, on a subnanometer scale, of a ceramic/metal heterophase interface, MgO/Cu, are presented. Segregation of Ag, from the Cu (Ag) matrix, at MgO/Cu interfaces is investigated and the Gibbsian interfacial excess of silver is determined; the range is 2.33 × 1018 to 5.81 × 1018 m−2. Also, silver segregation at the same MgO/Cu interfaces is analyzed employing a new approach that utilizes a proximity histogram or proxigram.

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Three-dimensional Investigation of Ceramic/Metal Heterophase Interfaces by Atom-probe Microscopy

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