# Weak-beam Image of a Network of Partial Dislocations

| Shown are two weak-beam images of the same area of a dislocation network with threefold symmetry in a small angle grain boundary in Silicon.
|  | Three sets of screw dislocations split into partial dislocations interact to form a network of partial dislocations bounding extended and constricted stacking faults.
|  | Only one set of dislocations and one kind of stacking fault is visible
| Two sets of dislocations are visible; the stacking faults are invisible.
| With more images the Burgers vector of all dislocations and the displacement vectors of the stacking faults can be determined. The complete analysis of this network in given in chapter 7; here the images only serve to illustrate that what you see depends very much on the imaging conditions.

With frame

6.3.2 Examples and Case Studies for Dislocations

© H. Föll (Defects - Script)