New materials that are stable at high temperatures in aggressive atmospheres over long periods of time are needed for more efficient and low-emission gas turbines, e.g. for aircrafts. Multicomponent equiatomic oxides (MEO), or high entropy oxides (HEO), are a promising new class of materials for this purpose, as they combine stability at high temperatures and low thermal conductivity. In addition, other attractive characteristics, such as ionic conductivity, reversible lithium storage, catalytic activity, and dielectric and magnetic properties, make HEOs an interesting class of materials.
The NanoMatFutur junior research group "High Entropy Oxides" is integrated in the funding line "From Material to Innovation" of the German Federal Ministry of Education and Research (BMBF). Within the framework of this research project, high entropy oxides for use as thermal barrier coatings (TBCs) are systematically developed and characterized in three successive PhD projects. Basic properties, such as phase stability, coefficient of thermal expansion and thermal conductivity, as well as application-relevant properties, such as thermocyclic resistance, mechanical and corrosion properties, are being investigated.
Doctoral projects of the junior research group "High Entropy Oxides"
Grant No. 03XP0301