Three-dimensional Investigation of Ceramic/Metal Heterophase Interfaces by Atom-probe Microscopy.
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 x 10(18) to 5.81 x 10(18) m(-2). Also, silver segregation at the same MgO/Cu interfaces is analyzed employing a new approach that utilizes a proximity histogram or proxigram.
Rüsing
J
J
Department of Materials Science and Engineering, Northwestern University, 2225 N. Campus Drive, Evanston, IL 60208-3108
Sebastian
J T
JT
Hellman
O C
OC
Seidman
D N
DN