2 Crash Revision of Basics (approximately 1 week, maybe less)
2.2 Basic Elasticity
Definition of Stress field
2.3 Survey of Types of Point Defects
Substitutional Defects
Vacancies, Interstitials
Shottky Defects, Frankel Defects
F Centers
NonStoichiometric Defects
Basic Chemistry of Substitutional Defects in Ceramics
KrogerVink Notation (later)
2.4 Edge, Screw and Mixed Dislocations
Basic Definition/Description
Glide, Climb and Dislocation Reactions
2.5 Boltzmann, FermiDirac and BoseEinstein Distributions
Target: quick (incomplete) coverage of some basics.
Elasticity
Stresses
Very much the same way as we talk about strains, we can define stresses as tensors:
σ
xx
,
σ
yy
,
σ
zz
and shear stresses
σ
xy
etc. These can be defined in cartesian coordinates, or in
others such as cylindrical and spherical polar coordinates. We can interpret
σ
ij
(where i
and j are some combination of axes, e.g. x,y) as the force along j for a surface whose
normal is along i.
For anisotropic case (i.e. real crystals) the relationship between stress and strain can get
quite complicated. For the isotropic case it is relatively easy. The forms are:
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 Winter '10
 MatSci
 1 week, Crystallographic defect

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