Dislocation theory

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Dislocation theory

Decoration of dislocation technique

A small amount of impurity is added to form precipitates after

suitable heat treatment to give internal structure of the

dislocation lines.

• Hedges and Mitchell first used

photolytic to decorate dislocation in

AgBr.

• Rarely used in metals but in ironic

crystals such as AgCl, NaCl, KCl

and CaF 2 .

Hexagonal network of dislocations

in NaCl detected by a decoration

technique.

Suranaree University of Technology May-Aug 2007

Tapany Udomphol

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