While doing defect analysis (g.b analysis) in TEM, why do we go for kikuchi pattern? why can we do with simple SAD pattern?
I am not sure if I have completely understood your question, but If you are doing what I am thinking.
Following Kikuchi lines to a convergence point of many Kikuchi lines, this interception give us a zone axis, so you have one plane where is located your dislocation (for instance), With the SAD patterd you will find the two bean contrast and then find the g vector, if the dislocation have been extinguished, when you come back to the phase contract mode, now you have two perpendicular planes are you are able to compute de burgers vector.
I hope it was what you were looking for it.
Cheers.
Many reason to keep an eye on kikuchi lines, some geenral ones are below:
To follow a specific Kikuchi line to reach from one zone axis to to another.
To set up your reflection "g" and to vary the deviation vector, in order to achieve kinematical and dynamical bright or dark field micro-graphs.
If you go further, kikuchi lines may also help determining the tem foil thickness.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science