Atomic matching across internal interfaces

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5457716

Merkle, K L ^[1]

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1. Argonne National Lab., IL (USA)

The atomic structure of internal interfaces in dense-packed systems has been investigated by high-resolution electron microscopy (HREM). Similarities between the atomic relaxations in heterophase interfaces and certain large-angle grain boundaries have been observed. In both types of interfaces localization of misfit leads to regions of good atomic matching within the interface separated by misfit dislocation-like defects. It appears that, whenever possible, the GB structures assume configurations in which the atomic coordination is not too much different from the ideal lattice. It is suggested that these kinds of relaxations primarily occur whenever the translational periods along the GB are large or when the interatomic distances are incommensurate. Incorporation of low index planes into the GB appears to lead to preferred, i.e. low energy structures, that can be quite dense with good atomic matching across a large fraction of the interface. 20 refs., 9 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5457716
• Report Number(s): CONF-8904290-3; ON: DE90002266
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COPPER
CRYSTAL STRUCTURE
CRYSTALS
ELECTRON MICROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
INTERFACES
METALS
MICROSCOPY
MICROSTRUCTURE
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS