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ANNEALING OF DISLOCATION LOOPS IN ALUMINUM

, 1966
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Prismatic dislocation loops and concentric dislocation loops in HPHT-grown diamond single crystals

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2003
Abstract As-grown diamond single crystals grown from Fe–Ni–C system under high temperature–high pressure were examined by transmission electron microscopy. There exist prismatic dislocation loops and concentric dislocation loops in the diamond, which are related to the nonequilibrium nature of the diamond synthesis process.
Longwei Yin, Musen Li, Zhao-Yin Hao
exaly   +2 more sources

Dislocation Loops in α-Iron

Physica Status Solidi (a), 1978
The equilibrium shapes of dislocation loops in α-iron under the action of a given shear stress are computed, taking into account the effects of elastic anisotropy on the line tension. In fair agreement with these calculations, dislocation loops observed by transmission electron microscopy of cyclically deformed α-iron single crystals are found to be ...
H. O. K. Kirchner, H. Mughrabi, F. Prinz, H. Schmid   +3 more
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Dislocation loops in antimony telluride

Physica Status Solidi (a), 1971
The investigation of the diffraction contrast of large hexagonal dislocation loops in Sb2Te3 suggests that nearly all of them are multiple loops. A model which explains satisfactorily the contrast is described. At elevated temperatures the loops do not shrink but take a circular equilibrium shape.
P . Skalicky, E . Wolfgang
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Energy of hexagonal dislocation loops

physica status solidi (b), 1966
AbstractThe elastic strain energy of an elongated hexagonal dislocation loop is calculated from the stress field of dislocation segments using isotropic elasticity theory. Energies of rhombus dislocation loops and rectangular dislocation loops are presented as limiting cases.
G. C. T. Lxu, J. C. M. Li
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Dislocation loops in diamond

Philosophical Magazine, 1962
Abstract Mat triangular plates of diamond have been thinned sufficiently by oxidation at high temperatures for an examination to be carried out by transmission electron microscopy. By suitably tilting the specimens all the diamonds examined have been shown to contain dislocation loops.
T. Evans, C. Phaal
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Crystallography of dislocations and dislocation loops in deformed iron

Philosophical Magazine, 1964
Abstract Crystallographic analyses of dislocations and dislocation loops in deformed b.c.c. iron observed in the electron microscope have been carried out by applying the electron diffraction theory of contrast at dislocations. Dislocations in deformed iron are in the form of tangles, with interspersed clusters of dislocation loops, from the very first
S. M. Ohr, D. N. Beshers
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Dislocation loops in finite systems

Physical Review B, 1994
The distortions induced by dislocation loops are studied in finite systems. The influence of finite size, D, of the system, surface tension, and surface-bending elastic constant on the nematic-smectic (NA) phase transition is discussed. In thin freely suspended smectic liquid-crystal films the nematic-smectic transition temperature, ${\mathit{T}}_ ...
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Residual image contrast of dislocation loops

Physica Status Solidi (a), 1978
The electron microscope images of large dislocation loops lying perpendicular to the electron beam are calculated by applying the image simulation technique. It is found that the residual double arc contrast arising from the g · b × u term exhibits asymmetry which is depth dependent.
J. Narayan, S. M. Ohr
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