title: The peculiarity of the metal-ceramic interface.
abstract: Important properties of materials are strongly influenced or controlled by the presence of solid interfaces, i.e. from the atomic arrangement in a region which is a few atomic spacing wide. Using the quantitative analysis of atom column positions enabled by CS-corrected transmission electron microscopy and theoretical calculations, atom behaviors at and adjacent to the interface was carefully explored. A regular variation of Cu interplanar spacing at a representative metal-ceramic interface was experimentally revealed, i.e. Cu-MgO (001). We also found the periodic fluctuations of the Cu and Mg atomic positions triggered by the interfacial geometrical misfit dislocations, which are partially verified by theoretical calculations using empirical potential approach. Direct measurements of the bond length of Cu-O at the coherent regions of the interface showed close correspondence with theoretical results. By successively imaging of geometrical misfit dislocations at different crystallographic directions, the strain fields around the interfacial geometrical misfit dislocation are quantitatively demonstrated at a nearly three-dimensional view. A quantitative evaluation between the measured and calculated strain fields using simplified model around the geometrical misfit dislocation is shown.
authors.affiliation: Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben A-8700, Austria.
authors.forename: Zaoli
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Long
authors.affiliation: Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben A-8700, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Cazottes
authors.affiliation: Department Physical Metallurgy and Materials Testing, University of Leoben, Franz-Josef-Strasse 18, Leoben A-8700, Austria.
authors.forename: R
authors.initials: R
authors.lastname: Daniel
authors.affiliation: Department Physical Metallurgy and Materials Testing, University of Leoben, Franz-Josef-Strasse 18, Leoben A-8700, Austria.
authors.forename: C
authors.initials: C
authors.lastname: Mitterer
authors.affiliation: Max-Planck-Institut für Eisenforschung, D-40237 Düsseldorf, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Dehm