Syllabus for ESM522 - Imperfections in Crystalline Materials

ESM522 is designed for advanced students who want to obtain a deeper quantitative understanding of the importance of crystalline defects (point, line and planar) on the thermal, physical and mechanical properties of metals, insulators and semiconductors. Students should have a background in the basic principles of thermodynamics of materials, and should have some knowledge of the theory of elasticity and crystallography. The text for the course will be "Theory of Dislocations" by J. P. Hirth and J. Lothe-2nd Ed. (Krieger Publishing). The section of the course on point defects will be taken from "Thermodynamics of Materials" by J. Swalin

1. Survey of Types of Crystalline Defects

   Importance of Defects to Material Behavior
	

2. Theory of  Point Defects

    Description of Point Defects
     - vacancies
     - interstitials
     - Frenkel disorder
     - Schottky disorder
    Thermodynamics of Point Defects
     - enthalpy of defect formation
     - configurational and vibrational entropy of defect formation
    Experimental Measurements of Point Defect Concentrations
     - X-rays
     - positron annhilation
    Effects on Physical and Mechanical Properties
     - electrical
     - strain hardening
    Thermodynamics of Defect Complexes
    Defects in Elemental Semiconductors
    Defects in Stoichiometric Compounds
    Applications 
     - Electronic Materials 
     - Theory of Oxidation 
    
    
3. Line Defects
    
    Introduction to Dislocation  Theory
    Geometry of Dislocations-Burgers Vectors
    Elastic Stress Fields of Straight Dislocations
    Theory of Curved Dislocations
    Forces on Dislocations-Peach-Koehler
    Interaction Energy of Dislocation Loops: the Blin Formula 
    Self Energies of Dislocation Loops
    Image Forces
    Kinks and Jogs
    Peierls Force and Core Energy
    Theory of Partial Dislocations, Stacking Faults and the Thompson Tetrahedron
    Applications of Dislocation Theory
     - Creep
     - Plastic Flow 
     - Fracture 
     - Fatigue
    
4. Grain Boundaries
    
    Types and Importance of Grain Boundaries to Materials
    Dislocation Models of Grain Boundaries
    Geometry of Grain Boundaries
    Calculation of Grain Boundary Energy
    Stresses Near Grain Boundaries
    Special Low Energy Boundaries
    Applications 
     - Hall-Petch Formula
     - Grain Boundary Engineering 
	

JQ 07/27/00.