Study of misfit dislocations at the interface of weakly bonded metal/metal systems

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Acta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-7151(91)90316-S· OSTI ID:7280281

Wolf, U; Fischmeister, H F ^[1]; Foiles, S M ^[2]

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1. Max-Planck-Inst. fuer Metallforschung, Inst. fuer Werkstoffwissenschaft, Stuttgart (DE)
2. Sandia National Lab., Livermore, CA (US)

In this paper, the behavior of misfit dislocations at Ag/Ni and Ag/Cu interfaces and the interface structures are discussed on the basis of calculations performed with the Embedded Atom Method (EAM). Particular attention is given to the possibility of the misfit dislocations being displaced out of the interface plane. The interface orientation chosen is (011){sub Ni/Cu} {parallel} (011){sub Ag} and (100){sub Ni/Cu} {parallel} (100){sub Ag}. Both systems have large and similar lattice mismatch but different ratios of their elastic moduli. Two different periodic cells have been considered for Ag/Ni, with opposite sign of the residual misfit. The interface energies and the structures of the regions of the maximum misfit are found to be virtually independent of the periodic cell chosen. It is found that the misfit dislocations should be located at most one lattice spacing away from the interface in the lattice with the smaller lattice constant. This implies a reduction of the atomic density at the interface.

• OSTI ID: 7280281
• Journal Information: Acta Metallurgica; (United States), Journal Name: Acta Metallurgica; (United States) Vol. 39:3; ISSN 0001-6160; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
CHEMICAL BONDS
COPPER
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELEMENTS
INTERFACES
LATTICE PARAMETERS
LINE DEFECTS
METALS
NICKEL
ORIENTATION
SILVER
TRANSITION ELEMENTS