A5063157437- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Fatigue and fracture mechanics
- Non-Destructive Testing Techniques
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Magnetic Properties and Applications
- Crystallography and molecular interactions
- Catalysis and Hydrodesulfurization Studies
- High-Velocity Impact and Material Behavior
- Electronic Packaging and Soldering Technologies
- Electric and Hybrid Vehicle Technologies
- Semantic Web and Ontologies
- Chemical Synthesis and Analysis
- High-Temperature Coating Behaviors
- Acoustic Wave Resonator Technologies
- Ultrasonics and Acoustic Wave Propagation
- Advanced ceramic materials synthesis
- Metal and Thin Film Mechanics
- Cellular and Composite Structures
- Aluminum Alloys Composites Properties
- Vehicle Dynamics and Control Systems
- Magnetic Field Sensors Techniques
- Mechanical and Optical Resonators
- Metal complexes synthesis and properties
Saarland University
2025
Fraunhofer Institute for Mechanics of Materials
2015-2024
University of Freiburg
2020
Karlsruhe Institute of Technology
2012-2015
TRW Automotive (Germany)
2012
Georgia Institute of Technology
2012
University of Eastern Finland
2001
Manganese oxide (Mn3O4) was subjected to mechanochemical activation (MCA) using a planetary ball mill investigate the influence of milling parameters on lithium intercalation. After activation, Mn3O4 lithiated in suspension with organolithium compounds. Structural changes, including LiMn3O4 formation, were analyzed by powder X-ray diffraction (PXRD) Rietveld refinement, supported scanning electron microscope (SEM), transmission microscopy (TEM), physisorption isotherms, and inductively...
Surfaces with tailored wettability have attracted considerable attention because of their wide range potential applications. Wettability can be finely designed by controlling the chemistry and/or morphology a surface. However, commonly adopted analytical theories Wenzel and Cassie-Baxter cannot describe variety intermediate metastable states, being thorough understanding combined chemical morphological effect on surface still lacking. Hence, design optimization these surfaces is generally...
Micro electro mechanical systems, coatings, and thin films contain materials that are often subjected to complex loading conditions high frequencies. Therefore, the implementation of a resonant multiaxial fatigue setup for small-scale samples is interest. Finite Element simulations have been used design which possess very close bending torsional The modes excited by two piezo actuators working either in or out phase with one another. amplitudes measured independently laser actuator...
The digitization of materials is the prerequisite for accelerating product development. However, technologically, this only beneficial when reliability maintained. This requires comprehension microstructure-driven fatigue damage mechanisms across scales. A substantial fraction lifetime high performance attributed to surface accumulation at microstructural scale (e.g., extrusions and micro crack formation). Although, its modeling impeded by a lack comprehensive understanding related...
Abstract Background Early fatigue mechanisms for various materials are yet to be unveiled the (very) high-cycle (VHCF) regime. This can ascribed a lack of available data capturing initial damage evolution, which continues adversely affect scientists and computational modeling experts attempting derive microstructural dependencies from small sample size incomplete feature representations. Objective The aim this work is address drive digital transformation such that future virtual component...
Uniaxial fatigue testing of micro-mechanical metallic specimens can provide valuable insight into damage formation. Magnetic and piezomagnetic are commonly used for qualitative characterization in ferromagnetic specimens. Sensitive accurate measurements with magnetic sensors is a key part such characterization. This work presents an experimental setup to induce structural defects test. Simultaneously, the resulting signals measured during complete lifetime tested specimen. The component...
Abstract Diastereoselective alkylation of the (2 S ,4 ) and R diastereomers 3‐ tert ‐butyl 4‐methyl 2‐ ‐butyl‐1,3‐oxazolidine‐3,4‐dicarboxylate ( 1a / b is reported. Formation both these oxazolidines was achieved by changing order protection steps, their relative absolute configurations were determined NOESY spectroscopy. The use bulky ring substituent t Bu together with Boc as N ‐protecting group led to exclusive formation only one alkylated diastereomer. (© Wiley‐VCH Verlag GmbH & Co....
This study focuses on the influence of additive manufacturing process strategies specimen geometry, porosity, microstructure and mechanical properties as well their impacts design metamaterials. Filigree additively manufactured NiTi specimens with diameters between 180 350 µm a nominal composition Ni50.9Ti49.1 (at %) were processed by laser powder bed fusion in first step. Secondly, they structures characterized optical electron microscopy micro tomography to investigate interrelations...
The stress distribution and fatigue behavior of nominally identical kilohertz resonators with two different thicknesses, 10 25 μm, was compared in this study. results highlight the non-uniform 3-D micron-scale notched cantilever beams that depends on thickness. areas corresponding to first principal being within 2% maximum value are much smaller than overall notch area a function device It is also shown non-negligible influence small, nanometer-scale geometrical variations dimensions devices...
Highly diastereoselective methylation of (2S,4S)- and (2R,4S)-3-tert-butyl 4-methyl 2-tertbutyloxazolidine- 3,4-dicarboxylate (1a / b) is reported. The relative absolute configuration the methylated products was assigned by NOESY confirmed a crystal structure 1a. Keywords: amino acids, alkylation, diastereoselectivity
The extreme sensitivity of quantum magnetometers enables new applications in material testing such as the identification single defect events bulk small volume specimen (0.1 mm³). Exposing ferromagnetic materials to strain alters their magnetic response. Due uncompensated spins, defects arising from fatigue process interact with domain walls. Optically pumped zero-field (OPM) provide required measure variations response and potentially quantify damage material. We first results a novel micro...
While large language models learn sound statistical representations of the and information therein, ontologies are symbolic knowledge that can complement former ideally. Research at this critical intersection relies on datasets intertwine text corpora to enable training comprehensive benchmarking neurosymbolic models. We present MaterioMiner dataset linked materials mechanics ontology where ontological concepts from domain associated with textual entities within literature corpus. Another...
While large language models learn sound statistical representations of the and information therein, ontologies are symbolic knowledge that can complement former ideally. Research at this critical intersection relies on datasets intertwine text corpora to enable training comprehensive benchmarking neurosymbolic models. We present MaterioMiner dataset linked materials mechanics ontology where ontological concepts from domain associated with textual entities within literature corpus. Another...
Crystal structure of digadolinium tricarbomolybdate(
For planning and sizing of charging stations for electric vehicles load profiles are needed. In a project new profile generator the synthesis at commercial has been developed. This paper introduces generator, methods used some results.