JoinHEC – Vývoj nových metód spájania vysoko-entropických keramických materiálov
Development of new joining methods for high entropy ceramics
Program: Bilateral – other
Project leader: Ing. Tatarko Peter, PhD.
Annotation: The main aim of the proposed project is to develop new joining techniques for high entropy ceramics (HEC) in order to improve the operational limits of the joints for aerospace applications. The project proposes an innovative way of manufacturing of HEC joints with potentially improved high temperature properties, using a direct solid-state diffusion bonding (without an interlayer) or diffusion bonding with refractory metal interlayers. For the first time, refractory high entropy alloys (HEA) will be used as the joining interlayers between a pair of HEC, or as the interlayer for joining of HEC to ceramic matrix composites (CMCs). The project aims to generate new fundamental knowledge on the understanding of the effect of electric field and surface preparation on the direct diffusion bonding of HEC, as well as the interfacial physico-chemical phenomena occurring at the HEC/HEA and HEA/CMCs interfaces. The mechanical performance of the joints at room and high temperatures will be investigated to define the operational limits of the joints. The project will provide a comprehensive insight on the joining of high entropy ceramics for potential aerospace applications. This may significantly expand the application potential of the recently developed next generation ultra-high temperature ceramics, i.e. high entropy ceramics.
Duration: 1.7.2022 – 30.6.2025
SIMBA – Sodík-iónové a sodík-kovové batérie novej generácie pre efektívne a udržateľné uskladnenie energie
Sodium-Ion and sodium Metal Batteries for efficient and sustainable next-generation energy storage
Program: Horizon 2020
Project leader: doc. Ing. Lenčéš Zoltán, PhD.
Annotation: Institute of Inorganic Chemistry, Slovak Academy of Sciences is participating in the SIMBA project “Sodium-Ion and sodium Metal BAtteries for efficient and sustainable next-generation energy storage” under the grant agreement 963542 has started on the 1st of January 2021. The Kick-off meeting took place online and headstarted a highly ambitious project to develop sustainable and safe batteries to store renewable energy.The SIMBA project has the concrete goal of delivering a safe and low-cost all-solid-state-sodium battery technology for stationary application. Reducing the use of critical materials is the core of SIMBA, which will employ sustainable battery materials, reducing supply risks and restrictions and environmental impact, which are instead currently affecting other technologies, i.e. Lithium-ion batteries. The unprecedented concept of SIMBA is based on the integration of a sodium metal anode in a sodium free assembly architecture including a highly porous support on the anode side, a single-ion conductive composite/hybrid polymer electrolyte and an innovative cathode material.SIMBA gathers a consortium of 16 partners from 6 EU and associated countries having received a funding from the European Commission of 8M €.For more information, please contact the coordinator of the project, Prof. Ralf Riedel: ralf.riedel@tu-darmstadt.deThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement Nº 963542
Duration: 1.1.2021 – 31.12.2024


ComCer – Vývoj nových keramických materiálov komplexného zloženia pre extrémne aplikácie
Development of new compositionally-complex ceramics for extreme applications
Program: SRDA
Project leader: Ing. Tatarko Peter, PhD.
Annotation: The main aim of the proposed project is to develop next generation ultra-high temperature ceramics capable of withstanding temperatures up to 3000°C for propulsion systems, rocket engines and other aerospace applications. This will be achieved by the synthesis of diboride ceramics with unique compositionally -complex structures, comprising of at least five metal elements. A systematic study will be conducted to generate new knowledge on the understanding of the effect of various molar ratios of individual metal cations in diboride structures on the stability, synthesis, sintering and mechanical properties of bulk diboride ceramics. The results will significantly contribute to the expansion of the high entropy ceramics concept with equimolar compositions towards the development of compositionally-complex ceramics with non-equimolar compositions. The project also proposes an innovative way of manufacturing ultra-high temperature ceramics, consisting of the development of ceramic composites based on the high-entropy and compositionally-complex diboride matrix, reinforced with the refractory additives. The output of the project will be new fundamental knowledge on the formation of disordered diboride structures, and their effect on mechanical properties of the materials at room, intermediate, and ultra-high temperatures.
Duration: 1.7.2022 – 30.6.2026
In-situ tvorba bioaktívneho funkčne gradientného nitridu kremičitého počas spekania v elektrickom poli
The in-situ formation of bioactive functionally graded silicon nitride by field assisted sintering
Program: VEGA
Project leader: Mgr. Tatarková Monika, PhD.
Annotation: This project proposes an innovative approach to develop new type of functionally graded Si3N4 bioceramics, consisting of electric field assisted sintering and post-sintering oxyacetylene flame treatment. Different experimental set-ups for field assisted sintering will be investigated in order to maximize a directional effect of electric current on the migration of bioactive additives towards one surface of the material. This will lead to the in-situ formation of a continuous graded Si3N4 biomaterials from a homogenous powder mixture. The bioactivity of the materials will be further improved by the flame treatment, forming a porous layer with bioactive additives. For the first time, the proposed approach will ensure the in-situ formation of a continuous graded structure without any distinct interfaces, typical of layered ceramics, which often act as stress concentrators. The effect of gradient structure on the mechanical and biological properties of novel functionally graded Si3N4 will be investigated.
Duration: 1.1.2022 – 31.12.2025
Elektromagnetické tienenie funkčne gradientných vrstevnatých kompozitov na báze SiC s prídavkom grafénu a uhlíkových nanorúrok
Electromagnetic shielding properties of functionally graded layered SiC-graphene and SiC-carbon nanotubes composites
Program: VEGA
Project leader: Ing. Hanzel Ondrej, PhD.
Annotation: The main goal of this project is preparation of layered SiC-carbon nanostructure composites with highelectromagnetic shielding effectiveness. The research will be focus on study of effect of carbon nanostructures (graphene nanoplatelets and carbon nanotubes) addition into the silicon carbide matrix and arrangement of functional layers on electromagnetic shielding effectiveness and functional properties of layered composites. In order to achieve project objectives, research focused on preparation of composite granulated powders with homogeneous distribution of graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) and their subsequent effective sintering will be necessary. Composition and arrangement of functional layers of composite layered materials with gradient content of carbon nanostructures will be optimized in order to achieve high electromagnetic shielding effectiveness. Functional and mechanical properties of such prepared layered composites will be studied as well.
Duration: 1.1.2021 – 31.12.2024