A5051117513- High Temperature Alloys and Creep
- Advanced Materials Characterization Techniques
- Nuclear Materials and Properties
- Advanced materials and composites
- Intermetallics and Advanced Alloy Properties
- Metallurgical and Alloy Processes
- Rare-earth and actinide compounds
- Advancements in Battery Materials
- Nuclear Physics and Applications
- Advanced Battery Technologies Research
- Magnetic Properties of Alloys
- Human-Automation Interaction and Safety
- Powder Metallurgy Techniques and Materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Enzyme Structure and Function
- High-pressure geophysics and materials
- Protein Structure and Dynamics
- X-ray Diffraction in Crystallography
- RNA and protein synthesis mechanisms
- Tactile and Sensory Interactions
- Titanium Alloys Microstructure and Properties
- High-Temperature Coating Behaviors
- Gaze Tracking and Assistive Technology
- Advanced Battery Materials and Technologies
- Nuclear reactor physics and engineering
Heinz Maier-Leibnitz Zentrum
2014-2021
Technical University of Munich
2014-2021
University of Edinburgh
2016
A thorough characterization of the key features new small-angle neutron scattering instrument SANS-1 at MLZ, a joint project Technische Universität München and Helmholtz Zentrum Geesthacht, is presented. Measurements beam profile, divergency flux are given for various positions along including sample position, agree well with Monte Carlo simulations using program McStas. Secondly, polarization option characterized broad wavelength band. feature large accessible Q-range facilitated by...
Small-angle X-ray and small-angle neutron scattering (SAXS/SANS) provide unique structural information on biomolecules their complexes in solution. SANS may multiple independent data sets by means of contrast variation experiments, that is, measuring at different D2O concentrations perdeuteration conditions the biomolecular complex. However, even combined from SAXS/SANS is far insufficient to define all degrees freedom a complex, leading significant risk overfitting when refining structures...
Small-angle neutron scattering is a tool providing information on nanostructures of objects in the order 1-300 nm. In this experiment pouch bag lithium ion battery cell was investigated with SANS ex situ, situ and operando during charging discharging. LiNi0.33Mn0.33Co0.33O2 used as cathode graphite anode material. The small-angle measurements were performed SANS-1 instrument at FRM II source Heinz Maier-Leibnitz Zentrum (MLZ) Garching, Germany. Ex components well static dynamic experiments...
Distracted driving is a problem which yearly causes large amount of road traffic crashes with high rates fatalities and injured persons. Recently, car manufacturers started to integrate driver monitoring systems detect visual distraction. This paper proposes method extend such by posture classification cell phone usage food consumption. Such an extension can be beneficial since that focus on the detection distraction mainly rely head pose gaze information. Thus, caused or consumption not...
Nickel-based superalloys are the materials of choice in hot section current gas turbines, but they reaching temperature limits constrained by their melting range. Co–Re alloy development was prompted a search for new future where application will be considerably higher. Addition very high point refractory metal Re to Co can increase range alloys much higher temperatures than commercial use today. The strategy is first discussed briefly. In this program, model ternary and quaternary...
Co–Re alloys are being developed for ultra-high-temperature applications to supplement Ni-based superalloys in future gas turbines. The main goal of the alloy development is increase maximum service temperature beyond 1473 K, i.e. at least 100 K more than present single-crystal superalloy turbine blades. strengthened by carbide phases, particularly monocarbide Ta. binary TaC phase stable very high temperatures, much greater melting and alloys. However, its stability within Co–Re–Cr system...
Although Ni-based superalloys meet the gas turbine needs of today, they are used very close to their melting range.To future demands turbines new materials with higher application temperatures needed.Addition Re increases temperature Co--based alloys and show promise supplement Ni-superalloys for ultra high applications.The Co-Re alloy development strategy is first discussed here briefly.Unlike single crystal γ-γ structure, have complex microstructure many different phases present in diverse...
Boron largely increases the ductility of polycrystalline high-temperature Co–Re–Cr alloys. Therefore, effect boron addition on alloy structural characteristics is large importance for stability at operational temperatures. Along with Co-solid solution matrix phase transformation from hcp to fcc structure, additional effects were observed in situ very high temperatures (up 1500 °C) using neutron diffraction (ND) boron-containing Co–17Re–23Cr Increasing content up 1000 wt. ppm lowers...
An improved data-reduction procedure is proposed and demonstrated for small-angle neutron scattering (SANS) measurements. Its main feature the correction of geometry- wavelength-dependent intensity variations on detector in a separate step from different pixel sensitivities: geometric wavelength effects can be corrected analytically, while sensitivities have to calibrated reference measurement. The are treated position-sensitive 3 He proportional counter tubes, where they anisotropic owing...
CoRe-based alloys strengthened by carbides are promising candidates for new high-temperature gas turbine applications.The high temperature microstructure and its stability of utmost importance, e.g.due to strengthening-phase selection.Neutron scattering, providing in situ information at temperatures, was extensively used the past CoRe research.The paper focuses on TaC alloy, particularly precipitates which were previously shown not dissolve up least 1300 • C. Small-angle neutron scattering...
Small-angle neutron scattering (SANS) is a powerful method for the characterization of materials in mesoscopic size range. For example, can be used to investigate precipitation mechanisms powder metallurgically processed materials. As result processing route, alloy matrix usually heavily textured. If precipitates have an orientation relationship matrix, they produce anisotropic pattern showing streaks. The superimposed by background with ellipsoidal shape, originating from deformed...
Cobalt−rhenium (Co−Re) alloys are developed for high‐temperature applications at ≈1200 °C and strengthened by dispersion of nanosized tantalum carbide (TaC) precipitates. Herein, the precipitation behavior during cooling from supersolution depending on rate addition chromium is presented. The phase composition (matrix phases TaC) analyzed wide‐angle neutron diffraction patterns measured in situ temperature cycling. TaC particles ex X‐ray small‐angle scattering. measurements used to extract...
Small-angle neutron scattering (SANS) data from single-crystal metastable β-Ti alloys exhibit an anisotropic character with interparticle interference maxima due to ordering of the dense system ω particles. For evaluation such data, program NOC (previously used for ordered γ′ precipitate in nickel-based superalloys) was well suited. Nevertheless, improvement this necessary its model-forming part. A further change concerned mode which size distribution calculated. This upgrade is presented....
Co-Re-based alloys are candidates for high-temperature applications in gas turbines.The addition of boron largely increases their ductility.The stability the Co-solid solution matrix and strengthening TaC minority phase at foreseen alloy operation temperatures (≥ 1200 • C), potentially influenced by presence boron, has to be considered.The hcp fcc transformation evolution was thus investigated Co-Re-Ta-C with varying situ neutron diffraction up 1500 C high vacuum furnace.The showed that no...
Non-destructive studies to investigate Li-ion batteries in situ/operando are a challenge although they show much more details on the processes during charging/discharging and aging. Especially, high sensitivity of neutrons light elements as Li easier distinction neighbor comparison X-rays lead powerful tool battery research. With neutron diffraction, changes commercial 18650-type NMC (LiNi 1/3 Mn Co O 2 )/graphite cylindrical cell can be followed nicely at graphite anode...
The gas hydrates are a group of compounds which wide importance.They model systems for the study interactions between water and other molecules can thus provide fundamental insight into such interactions.Gas also cheap environmentally benign way to store transport gases potentially crucial task decarbonising energy economy.Finally, common in nature their behaviour affects phenomena as diverse Earth's paleoclimate magnetic fields Uranus Neptune.High pressure studies valuable all these...