A5069629192- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Advanced Cellulose Research Studies
- Advanced ceramic materials synthesis
- Microstructure and mechanical properties
- Advanced Surface Polishing Techniques
- Semiconductor materials and devices
- Boron and Carbon Nanomaterials Research
- Copper Interconnects and Reliability
- GaN-based semiconductor devices and materials
- Natural Fiber Reinforced Composites
- Advanced materials and composites
- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Wood Treatment and Properties
- Lignin and Wood Chemistry
- Force Microscopy Techniques and Applications
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Aluminum Alloys Composites Properties
- Advanced Battery Materials and Technologies
- Welding Techniques and Residual Stresses
- Advanced Materials Characterization Techniques
- Advanced X-ray Imaging Techniques
Montanuniversität Leoben
2016-2025
Austrian Academy of Sciences
2015-2024
Erich Schmid Institute of Materials Science
2015-2024
Materials Center Leoben (Austria)
2006-2023
University of Vienna
2022-2023
BOKU University
2012-2020
Material (Belgium)
2011-2019
Material Physics Center
2005-2018
Helmholtz-Zentrum Hereon
2016
National Synchrotron Radiation Research Center
2011
The issue of stress in thin films and functional coatings is a persistent problem materials science technology that has congregated many efforts, both from experimental fundamental points view, to get better understanding on how deal with, tailor, manage areas applications. With the miniaturization device components, quest for increasingly complex film architectures multiphase systems continuous demands enhanced performance, there need toward reliable assessment submicron scale spatially...
Collagen type I is the most abundant structural protein in tendon, skin and bone, largely determines mechanical behaviour of these connective tissues. To obtain a better understanding relationship between structure properties, tensile tests synchrotron X–ray scattering have been carried out simultaneously, correlating with changes microstructure. Because intermolecular cross–links are thought to great influence on collagen, we also experiments using cross–link–deficient tail–tendon collagen...
The ability to increase the thermal stability of protective coatings under work load gives rise scientific and industrial interest in age hardening complex nitride coating systems such as ceramic-like Ti1−xAlxN. However, decomposition pathway these from single-phase cubic thermodynamically stable binary nitrides (cubic TiN wurtzite AlN), which are essential for hardening, not yet fully understood. In particular, role kinetics still requires more detailed investigation. present work, combined...
Understanding the cause of lithium dendrites formation and propagation is essential for developing practical all-solid-state batteries. Li are associated with mechanical stress accumulation can cell failure at current densities below threshold suggested by industry research (i.e., >5 mA/cm2). Here, we apply a MHz-pulse-current protocol to circumvent low-current metal cells operating up density 6.5 mA/cm2. Additionally, propose mechanistic analysis experimental results prove that activity...
Abstract The integrity of structural materials is oftentimes defined by their resistance against catastrophic failure through dissipative plastic processes at the crack tip, commonly quantified J -integral concept. However, to date experimental stress and strain fields necessary quantify associated with local propagation in its original integral form were inaccessible. Here, we present a multi-method nanoscale strain- stress-mapping surrounding growing tip two identical miniaturized fracture...
Cellulose nanofibrils were prepared by mechanical fibrillation of never-dried beech pulp and bacterial cellulose. To facilitate the separation individual fibrils, one part wood was surface-carboxylated a catalytic oxidation using (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) as catalyst. After high pressure homogenizer, obtained aqueous fibril dispersions directly mixed with different urea-formaldehyde-(UF)-adhesives. investigate effect added cellulose filler on fracture properties...
Hardness and elastic modulus of spruce wood cell walls parallel to their axial direction were investigated by means nanoindentation. In the secondary wall layer S2 individual earlywood compression tracheids, a systematic pattern variability was found. Several factors potentially affecting nanoindentation results investigated, i.e. specimen orientation related indenter tip, cutting during preparation, tip geometry, fibre inclination, respectively, finally micro fibril orientation. Mechanical...
Novel scanning synchrotron cross-sectional nanobeam and conventional laboratory as well Laplace X-ray diffraction methods are used to characterize residual stresses in exemplary 11.5 µm-thick TiN coatings. Both real space approaches reveal a homogeneous tensile stress state very pronounced compressive gradient as-deposited blasted coatings, respectively. The unique capabilities of the approach operating with beam size 100 nm diameter allow analysis variation sub-micrometre resolution at...
A facile approach to obtaining cellulose nanofiber-reinforced polystyrene with greatly improved mechanical performance compared unreinforced is presented. Cellulose nanofibers were obtained by fibrillation of partially delignified wood (MFLC) and from bleached pulp. Residual hemicellulose lignin imparted amphiphilic surface chemical character MFLC, which enabled the stabilization emulsions styrene in water. Upon suspension polymerization emulsion, microspheres coated MFLC obtained. When...
Laser powder bed fusion (LPBF) facilitates economic advantages by enhancing cutting speeds of tools through the implementation complex internal cooling channels that could not be fabricated otherwise. However, tool steels are prone to cracking during cyclic remelting process with extremely fast rates due their high carbon and alloying element contents related stresses. In this work, a correlation between microscopic crack patterns in steel processed via LPBF, residual stress gradients, local...