Study of misfit dislocations at the interface of weakly bonded metal/metal systems
- Max-Planck-Inst. fuer Metallforschung, Inst. fuer Werkstoffwissenschaft, Stuttgart (DE)
- 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), Vol. 39:3; ISSN 0001-6160
- Country of Publication:
- United States
- Language:
- English
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