Syllabus
1. Plastic deformation of ionic crystals. Structure of dislocations. Defects in ionic crystals and motion of dislocations. Peierls stress. Interaction between dislocations and impurity atoms. High temperature deformation and creep. Cross slip of dislcoations in ionic crystals.
2. Plastic deformation of semiconductors. Dislocation core. Motion of dislocations and nucleation of kinks. Effect of doping on mechanical properties. High temperature deformation and creep. Conductivity and deformation.
3. Plastic deformation of ceramics. Crystallography of dislocation glide. Glide and climb of dislocations. Creep of ceramics. Superplasticity of ceramics.
4. Deformation behaviour of composites. Yield stress. Ductility. Effect of fibres on mechanical properties. Characteristics of the deformation behaviour composites with metallic, ceramic and polymer matrix.
Annotation
Mechanical and physical properties of microcrystalline materials. Nanocrystals and their physical and mechanical properties. Intermetallics. Composite materials; interfaces. Bulk amorphous materials. Superplastic processing. Powder metallurgy. Surface technology; hardening of materials using laser technology.
Suitable for students in the 8th and 9th semester as well as for PhD students