Syllabus
1. Point defects. Vacancies. Interstitials. Schottky defects. Frenkel defects. Equilibrium concentrations of point defects. Non-equilibrium concentrations of point defects. Point defects in crystals with covalent and ionic binding.
2. Dislocations. Edge and screw dislocations. Burgers loop. Burgers vector. Stress field of dislocations. Energy of dislocations. Line energy of dislocations. Force on dislocation. Reactions between dislocations. Frank-Read dislocation source. Conservative and non-conservative dislocation motion. Intersection of dislocations. Interaction of dislocations with point defects. Dislocations in various crystal structures.
3. Stacking faults. Stacking faults in fcc and hcp structures. Partial dislocations. Grain boundary, subgrain boundary. Types and characteristics of interfaces. Polygonisation. Small angle boundaries. Energy of grain boundary. High angle boundary. Dislocations in grain boundary.
4. Volume defects. Coherent and non-coherent precipitates.
Annotation
Point defects in metals, ionic crystals and semiconductors. Equilibrium and non-equilibrium concentrations.
Dislocations. Stacking faults.
Dissociated dislocations. Coherent and incoherent principitates.