This document discusses the atomic structure and mechanical properties of materials. It covers the different types of bonds that can exist between atoms, including ionic, covalent, metallic and van der Waals bonds. It also describes the arrangement of atoms in crystalline structures, including properties like packing efficiency and symmetry. Finally, the document discusses dislocations and plastic deformation in materials.

1. MECHANISMS

2.  Atomic structure of condensed
matter
 Fundamental mechanical properties of materials by relating them to the
atomistic structure of solids.
 Interaction which atoms have with each other

3.  Binding forces between the atoms
 Ionic bond
 Coondvalent bond
 Metallic bond
 Van der waal’s bond
 Mixed bonding

4. Arrangement of atoms (Crystallogrophy)
 Bravais lattice
 c/a Ratio
 Co-ordination number
 Atoms per unit cell
 Packing factor
 Linear & planar packing fractions
 Density
 Stacking sequence
 Stacking Faults & Twinning
 Polymorphic & Allotropic
Materials
 Rotation Axis & Symmetry
 Rotation Axis & Symmetry
 Miller Indices
 Interplanar Spacing
 Directions
 Hexagonal Planes & Directions
 Polycrystallinity
 Anisotrophy
 Atomic Structure of Polymers
 Crystal Structure of Ceramic
 Closing Remark

5. Plasticity & Strength of Materials
 Role of Dislocations & their moment
 Dislocations
 Edge dislocations
 Burgers vector
 Slip in FCC material
 Slip System
 HCP Materials
 BCC Materials
 Screw Dislocation
 Mixed Dislocation
 Refinements
 Frank- Read Source
 Cross Slipping
 Polycrystals
 Schmid’s Law

6. Summary
 Metals
 Ceramics
 Polymers
 Electronic Material
 Clay
Concluding Remarks
 Elastic Properties