Institute of Physics
Topic
Application of the concept of HEA atoms substitution in development of new materials prepared by different quenching and processing rates
PhD. program
Physics of Condensed Matter and Acoustics
Year of admission
2025
Name of the supervisor
Ing Peter Švec Jr., PhD.
Contact:
Receiving school
Faculty of Mathematics, Physics and Informatics
Annotation
Focus of the thesis is preparation and implementation of the concept of substitution of existing equilibrium Wyckoff crystallographic positions in known equilibrium crystalline lattice by different types of majority metal atoms consisting of a set of 3-5 additional/other suitable atoms. These atoms, so-called HEA atoms, will be selected in accordance with the principle of High Entropy Alloys (HEA) or compounds e.g. ceramics, dielectrics or oxides, to form a similar, mutually shared crystallographic structure with lattice parameters comparable to those of the original equilibrium unit cell and are inserted for the purpose of controlled optimization of physical properties of the system. Objects of application of such concept will be alloys derived from classical known HEA but also systems forming metallic glasses of metal-metalloid type, porous catalytic materials, selected ceramics based on carbides and borides or oxides, using possibility to prepare systems in non-equilibrium state via different cooling rates.