Department of Chemistry of Materials

invites you to the lecture of the seminar “Advanced Materials”

Institute of Physics, Czech Academy of Sciences, Prague

Introduction to high-entropy alloys

High-Entropy Alloys (HEA) are an innovative class of materials composed of five or more elements in approximately the same molar ratio. Due to their high mixing entropy, they exhibit unique properties such as high strength, hardness, wear and corrosion resistance. They are also characterised by excellent thermal stability and the ability to retain mechanical properties even at extreme temperatures. Some HEAs also exhibit superconducting or magnetic behaviour, which opens up possibilities for their use in advanced technologies. They typically crystallise in simple crystal structures such as FCC or BCC, but can also contain more complex phase compositions depending on their chemical composition and preparation conditions. Modern production methods, such as powder metallurgy, allow their efficient production. HEAs find applications in aerospace, energy, medicine and electronics. Current research focuses on the optimisation of the composition, phase stability and prediction of new alloys in order to achieve the desired properties. This presentation will provide an overview of the key design principles of these alloys, their microstructure, fabrication methods and potential applications in industry and scientific research.
Ing. Andrea Školáková, Ph.D.

Andrea Školáková works in the Controlled Microstructure Materials research group. At the Institute of Physics, she has established research on high-entropy alloys that are suitable for e.g. bioapplications, aerospace and automotive applications.
She was the first in the world to explain the mechanisms and kinetics of the formation of intermetallic compounds during reactive sintering (sintering of powder mixtures) in her PhD thesis at the University of Chemical Technology in Prague.
The innovative chemical composition of the alloys, which the young scientist is designing and investigating, allows to achieve excellent mechanical properties when used in bioapplications. In addition, her goal is to prepare the alloys so that they have mechanical properties as similar as possible to human bone and can be used as a permanent implant. The research results will find applications for the preparation of statically loaded components in industry.
Andrea Školáková is a leading expert in the field of physical metallurgy, and her depth of theoretical knowledge and understanding of the structure and mechanical properties of modern metals is evidenced by her many publications.