The course is devoted to training in the field of solid phases crystal chemistry and atomic mechanisms of phase transformations in solids. The following problems are discussed within the scope of this course.
Crystalline structure of elements, solid solution and intermediate phases. Solid solution types. Thermodynamics of solid solution. Extent of solid solution homogeneity region. Hume-Rothery’s rules. Darken-Gurry’s diagram. Effect of electronic structure on the extent of solid solution homogeneity region. Atomic ordering. Long-range and short-range coordination order. Thermodynamics of the atomic ordering. Conditions of atomic order formation. Structure and characterization of various intermediate phases. Crystal chemical factors determinative of intermediate phase formation. Amorphous, quasicrystalline and nanocrystalline phases.
Classification, thermodynamics and kinetics of phase transformations in solids. Atomic mechanisms of martensite and diffusion transformations. Role of the atomic structure, lattice defects and atom diffusion mobility in phase transformations. Structural and phase transformations under extreme conditions.
|Hours of lecture||Hours of discussion||Hours in laboratory||Hours of independent study||Total numbers of hours|
By the completion of this course, students will be expected to
- to use the main conceptions of solid phases crystal chemistry for forecast of component chemical bonding in condensed state;
- to use the main conceptions about atomic mechanisms of phase transformations in solids for forecast of alloy structure and properties;
- to describe the atomic structure and chemical bonding in solid phases as well as their properties;
- to enable recommendations in selection of components and treatments for the purpose of favorable structure and properties formation in solids;
- to solve the theoretical and applied problems connected with the professional activities;
- to work independently with the literature in search of the necessary information
- Crystalline structure of elements and solid solution
- Crystal chemistry of intermediate phases
- Structure of amorphous, quasicrystalline and nanocrystalline phases.
- Atomic mechanisms of transformations in solids. Difference between the transformations in solids and crystallization from melt. Diffusion in solids and liquids.
- Martensite and diffusion transformations. Role of the atomic structure, lattice defects and atom diffusion mobility in phase transformations. Structural and phase transformations under extreme conditions.
- Robert W. Cahn and Peter Haasen, Physical Metallurgy, 4th edition, Elsevier Scince B.V., 1996.
- Haasen, Physical Metallurgy, Cambridge University Press, 2003.
- G. S. Rohrer, Structure and Bonding in crystalline Materials, Cambridge University Press, 2001