Elastic interaction energy between a prismatic dislocation loop and a spherical cavity

1988 ◽  
Vol 57 (6) ◽  
pp. 923-937 ◽  
Author(s):  
W. G. Wolfer ◽  
W. J. Drugan
Keyword(s):  
Interaction Energy ◽  
Dislocation Loop ◽  
Spherical Cavity ◽  
Elastic Interaction ◽  
Prismatic Dislocation Loop

Elastic Interaction of Defects on Crystal Surfaces

1999 ◽  
Vol 121 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Demitris Kouris ◽  
Alonso Peralta ◽  
Karl Sieradzki
Keyword(s):  
Interaction Energy ◽  
Surface Defects ◽  
Film Growth ◽  
Crystal Surface ◽  
Elastic Field ◽  
Elastic Interaction ◽  
Flow Mode ◽  
Elastic Model ◽  
Far Field ◽  
Embedded Atom

Surface defects corresponding to adatoms, vacancies and steps interact, affecting and often dominating kinetic processes associated with thin-film growth. A discrete harmonic model for the evaluation of the interaction energy between surface defects is presented. It is based on the concept of eigenstrains and allows for the accurate evaluation of the elastic field, both at the immediate vicinity of the defects, as well as in the far field. Results for the interaction energy suggest conditions for which a body-centered-cubic crystal surface will grow in a stable, two-dimensional, step-flow mode. In order to verify the accuracy of the discrete elastic model, we present results of atomic simulations that incorporate Embedded Atom Method (EAM) potentials. The discrete elastic model results compare favorably with results from our atomic EAM simulations and agree with the far-field predictions of continuum elastic theory.

The circular prismatic dislocation loop in an interface

1979 ◽  
Vol 39 (5) ◽  
pp. 685-691 ◽  
Author(s):  
N. J. Salamon ◽  
M. Comninou
Keyword(s):  
Dislocation Loop ◽  
Prismatic Dislocation Loop

The dislocation void interaction

1972 ◽  
Vol 329 (1576) ◽  
pp. 121-136 ◽  
Keyword(s):  
Exact Solution ◽  
Interaction Energy ◽  
Screw Dislocation ◽  
Spherical Cavity ◽  
Induced Field ◽  
Growth Of Voids ◽  
Void Interaction

An exact solution for the induced field when a straight screw dislocation is adjacent to a spherical inhomogeneity is presented. This solution is used to calculate the interaction energy and force between the dislocation and the inhomogeneity. Specific results are given when the inhomogeneity is a spherical cavity (a void). The induced dilatation field is also obtained and used to discuss the resulting drift of interstitials into the void; the significance of this induced drift as a saturation mechanism in the growth of voids in irradiated materials is emphasized.

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