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Tuesday, 22 March 2016

LINE DEFECTS

          Line imperfections are called dislocations. A linear disturbance of the atomic arrangement, which can move very easily on the slip plane through the crystal, is known as dislocation. The dislocation may be caused during growth of crystals from a melt or form a vapor or they may occur during a slip.
          The defect which takes place due to dislocation of atoms along a line in same direction is called line defects. The line defects also takes place when a central portion of a crystal lattice slips without affecting the outer portion. These are two types of line defects:


          Both these defects are the most striking imperfections and are responsible for the useful property of ductility in metals, ceramics and crystalline polymers.

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