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

Published online by Cambridge University Press:  07 August 2002

Järg Rüsing ,
Jason T. Sebastian ,
Olof C. Hellman  and
David N. Seidman
Järg Rüsing
Affiliation:
Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Drive, Evanston, IL 60208-3108
Jason T. Sebastian
Affiliation:
Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Drive, Evanston, IL 60208-3108
Olof C. Hellman
Affiliation:
Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Drive, Evanston, IL 60208-3108
David N. Seidman*
Affiliation:
Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Drive, Evanston, IL 60208-3108
*
*Corresponding author
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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.

Keywords

heterophase interfacesMgO/Cuthree-dimensional atom-probe microscopyinterfacial segregationsilverproxigramceramic/metal interfaces
Type
Research Article
Information
Microscopy and Microanalysis , Volume 6 , Issue 5 , September 2000 , pp. 445 - 451
Copyright
Copyright © Microscopy Society of America 2000

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