A5011243951- Advanced Materials Characterization Techniques
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- High Temperature Alloys and Creep
- Metallic Glasses and Amorphous Alloys
- Aluminum Alloys Composites Properties
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Microstructure and Mechanical Properties of Steels
- Phase-change materials and chalcogenides
- Glass properties and applications
- Nanoporous metals and alloys
- Force Microscopy Techniques and Applications
- Surface and Thin Film Phenomena
- Cellular and Composite Structures
- Anodic Oxide Films and Nanostructures
- Metallurgical and Alloy Processes
- Metal Alloys Wear and Properties
- Magnesium Alloys: Properties and Applications
- Mineralogy and Gemology Studies
- ZnO doping and properties
- Material Dynamics and Properties
Helmholtz-Zentrum Berlin für Materialien und Energie
2011-2022
Kharkiv Institute of Physics and Technology
2018
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
1996-2008
Chalmers University of Technology
2008
Joanneum Research
2008
German Orient Foundation
2007
Abstract The natural aging behavior of pure ternary Al‐Mg‐Si alloys is investigated by measuring hardness, electrical resistivity and positron lifetime, as well carrying out thermal analysis atom probe microscopy. It found that several distinct temporal stages can be distinguished in which one these quantities shows a characteristic times coincide for many measurements. rate change the measured data correlated with proposed solute dynamics during both takes place prior to artificial (natural...
We present a quantitative study of the catalytic activity well-defined faceted gold–palladium nanoalloys which are immobilized on cationic spherical polyelectrolyte brushes. The brush particles used as carriers for consist solid polystyrene core onto chains 2-aminoethyl methacrylate attached. Au/Pd nanoalloy with sizes in range from 1 to 3 nm have been generated homogeneously distributed surface reduction 4-nitrophenol has chosen well-controlled model reaction allowing us determine function...
The most commonly investigated high entropy alloy, AlCoCrCuFeNi, has been chosen for optimization of its microstructural and mechanical properties by means compositional changes heat treatments. Among the different available paths, decrease segregating element Cu, increase oxidation protective elements Al Cr approach towards a γ-γ′ microstructure like in Ni-based superalloys have probed compared. Microscopical observations made every step. Vickers microhardness measurements and/or...
Abstract Oxidation behavior of the compositionally complex alloys (high‐entropy alloys) Al 8 Co 17 Cr Cu Fe Ni 33 (fcc‐alloy), 23 15 (bcc‐alloy), and (reference‐alloy) at elevated temperatures in air is investigated. The microstructures oxide scales substrates are analyzed using scanning electron microscopy X‐ray diffraction. All oxidized follow a parabolic kinetic law with low mass change per surface area 800 °C. alloy follows sub‐parabolic 1 000 °C exhibits good oxidation resistance both...
A novel sonochemical method for formation of mesoporous metal sponges is developed. Systematic investigation ultrasound effects on various types particles reveals the cavitation-induced oxidation surface and etching matrix as main factors in ultrasound-driven modification. Beyond specific examples, findings provide guidelines expansion concept towards a broad variety systems allow development approaches to manipulation inner structure.