A5082676145- Advanced ceramic materials synthesis
- Intermetallics and Advanced Alloy Properties
- Advanced materials and composites
- Microwave Dielectric Ceramics Synthesis
- Advancements in Battery Materials
- Advanced Materials Characterization Techniques
- Polymer Nanocomposites and Properties
- Nuclear Materials and Properties
- Diamond and Carbon-based Materials Research
- Electrical and Thermal Properties of Materials
- Semiconductor materials and devices
- Mechanical Behavior of Composites
- Metal and Thin Film Mechanics
- Thermal and Kinetic Analysis
- Metallurgical Processes and Thermodynamics
- Advanced Battery Materials and Technologies
- Electronic Packaging and Soldering Technologies
- Natural Fiber Reinforced Composites
Karlsruhe Institute of Technology
2022-2025
Fraunhofer Institute for Chemical Technology
2017
The binary tantalum–oxygen system is assessed using the CALculation of PHase Diagrams (CALPHAD) method with experimental data from literature. oxygen solubility in Ta solid‐solution phase discussed and modeled. low‐ high‐temperature modifications 2 O 5 are described as stoichiometric compounds. This dataset extended into ternary Al–Ta–O by complementing it datasets for Al–O Al–Ta literature adding mixed‐oxide AlTaO 4 . Al–Nb–O created combining three corresponding assessing quasibinary...
Coarse‐grained composites of refractory ceramics and metals are a novel approach for materials at application temperatures up to 1500 °C. Al 2 O 3 the Nb Ta suitable candidates enhanced thermal shock capability, as they show similar expansion. During fabrication, key aspect consider is possible formation additional phases upon interaction constituent well through reaction with environment. X‐Ray diffraction (XRD) investigations microstructure scanning electron microscopy methods unveil –Nb...
Parts for metallurgical applications made from refractory metal–ceramic composites offer improved thermal shock resistance due to their capability resistive heating compared ones solely ceramics such as Al 2 O 3 . The combination of and Nb is intriguing both show similar expansion behavior over a wide temperature range. high affinity form nonprotective oxides, however, hampers its use in oxidative environments. Formation phases at the ceramic–metal interface can have detrimental effects on...
Li1.11(Ni0.4Mn0.4Co0.2)O2 powders were chemically delithiated by (NH4)2S2O8 oxidizer to obtain Lix(Ni0.4Mn0.4Co0.2)O2 powders. The thermal behavior of two specimens, Li0.76Ni0.41Mn0.42Co0.17O2.10 and Li0.48Ni0.38Mn0.46Co0.16O2.07, was studied compared the pristine specimen. Phase transitions at elevated temperatures investigated simultaneous analysis (STA) gas evolution accompanying phase analyzed mass spectroscopy an oxygen detector. enthalpy samples a specimen measured high temperature...
Heat treatment of Ta/Nb-alumina composite parts during fabrication or service can involve the formation refractory oxide phases if additional oxygen is present. The joint approach CALPHAD-based calculations and experimental methods involving electron backscatter diffraction sheds light on why Ta-containing composites form ternary AlTaO4, but in Nb-containing samples only binary compound NbO found. Further information be found article number 2200161 by Michael Eusterholz co-workers. (Photo...