PHASE TRANSFORMATION OF MATERIALS
TEACHER: SIR SALMAN SAFDAR
MM-404: PHASE TRANSFORMATIONS IN MATERIALS
Phase transformation in materials. Equilibrium transformations; first order and second order, Order-disorder transitions, transformations in complex structures, Driving force for phase transformation, Free energy changes during phase transformation, Concept of Gibbs’s free energy, Volume free energy, and strain free energy Critical radius. Liquid-solid transformation, Solidification, Homogeneous nucleation; surfaces and interfaces; heterogeneous nucleation; polymer crystallization; nucleation rate; planar vs. dendritic interface growth; Gibbs-Thomson effect; dendrite velocity; alloy solidification; zone-refining; constitutional supercooling; solid-solid phase transformation; Nucleation & growth, homogeneous and heterogeneous nucleation, nucleation on crystalline defects and on grain boundaries. spinodal decomposition, Transformation in the Solid State Precipitation reactions, GP zones, Intermediate and stable precipitate, Coherency strain, Diffusion-controlled transformations. Interfacial energy-controlled transformations, e.g., transformations far from equilibrium conditions. Nano-scale particles. Diffusionless transformations. Ordered and disordered transformation, Recovery, crystallization and grain growth.
Phase transformations in non metallic materials and its effect on mechanical and physical properties. Transformations in glasses and organic materials.