Geology Reference
In-Depth Information
Fig. 6.12 a Effect of an obstacle on the motion of dislocations (a copy of Fig. 9 from McLaren
et al.
1989
). b Dislocation cell structure in quartz (copy of Fig. 7.4 from Morrison-Smith
1973
)
Fig. 6.13 Dislocation
structure in a low-angle tilt
boundary (supplied by Dr.
J. D. Fitz Gerald)
while the curved characters of the dislocations illustrated in Fig.
6.10
b suggests
that structural control is unimportant in this case. Dissociation of dislocations can
also be revealed in TEM images (Fig.
6.11
b).
The effect of localized obstacles on the motion of dislocations can be seen in
TEM images such as Fig.
6.12
a. However, special techniques may have to be used
