Study of energy versus misorientation for (001) twist boundaries in gold by crystallite rotation method
- Massachusetts Institute of Technology, Cambridge (USA)
Gold crystallites ({approximately}800 {angstrom} dia), epitaxially distributed on the (001) surface of a NaCl single crystal, were prepared. These crystallites, while on their substrate, were then welded onto a single crystal (001) gold film at a preselected twist angle, {theta}. The NaCl was then dissolved away to obtain a film on which the crystallites were all attached at the angle {theta}. A (001) twist boundary therefore existed in the neck region of each crystallite which could be observed directly by transmission microscopy. Upon annealing, the crystallites rotated when the boundary energy varied with {theta}. The crystallites rotated into two special misorientations corresponding to the {sigma}=1 and the {sigma}=5 misorientations indicating that the energy versus twist angle curve possesses cusps at these misorientations. The rotation occurred conservatively by the observed loss of screw dislocations from the boundary. The results are relevant to recent calculations of the energies of (001) twist boundaries and the applicability of the dislocation/structural unit model.
- OSTI ID:
- 5311033
- Report Number(s):
- CONF-840909--
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN 0197-1689; ISSN TMPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CHEMICAL PREPARATION
CHLORIDES
CHLORINE COMPOUNDS
CORRELATIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFRACTION METHODS
DISLOCATIONS
ELEMENTS
ENERGY
FREE ENERGY
GOLD
GRAIN BOUNDARIES
HALIDES
HALOGEN COMPOUNDS
LINE DEFECTS
MEASURING METHODS
METALS
MICROSCOPY
MICROSTRUCTURE
ORIENTATION
PHYSICAL PROPERTIES
ROTATING CRYSTAL METHOD
SODIUM CHLORIDES
SODIUM COMPOUNDS
SURFACE ENERGY
SURFACE PROPERTIES
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS