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Metallurgy and Material Science
Diffusion in solids (Web)
Syllabus
Co-ordinated by :
IISc Bangalore
Available from :
2012-04-23
Lec :
1
Modules / Lectures
Thermodynamics and defects in solids
Concept of free energy, enthalpy and entropy
Gibb’s free energy change with temperature in a single component system
Thermodynamic parameters in a binary system
Thermodynamics and phase diagrams
Concept of the chemical potential and the activity of elements
Point defects: Equilibrium vacancy concentration in a pure element.
Equilibrium concentration of interstitial atoms
Defects in the ordered phases
Calculation of thermodynamic parameters
Fick’s laws
Fick’s laws of diffusion and thin film solution
Solution in sem- infinite diffusion couples (error function analysis)
Solution for homogeneization (separation of variables)
Diffusion under chemical potential gradient, the composition profiles in an interdiffusion zone
Diffusion under the thermodynamic driving forces
Driving force for diffusion and Fick’s laws of diffusion
Product phase formations because of diffusion in real systems
Diffusion process as a tool to make products
Definition and description of different diffusion terms
Atomic mechanism of diffusion
Interstitial diffusion
Concept of random walk
Substitutional diffusion
Activation energy for diffusion
Orientation dependence
Diffusion in the ordered phases
Determination of different kinds of diffusion parameters
Matano-Boltzmann analysis
Calculation of diffusion parameters using the Matano-Boltzmann analysis
Den Broeder and Wagner’s approach
Problem of finding the initial contact plane
Effect of molar volume in a hypothetical diffusion couple
The Kirkendall effect
The intrinsic diffusion coefficients: Darken analysis and the van Loo relation
Integrated diffusion coefficient
Calculations of the integrated diffusion coefficients
Tracer diffusion coefficient and the vacancy wind effect
Recent developments on the Kirkendall effect
Physico-chemical approach
Grain boundary diffusion
Phase diagram and diffusion in ternary and multicomponent systems
Ternary phase diagrams
Ternary and multicomponent diffusion
Intrinsic, integrated and the average diffusion coefficients
Phase diagram determination by the diffusion couple technique
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