Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Erscheinungsjahr
- 2017 (244) (entfernen)
Dokumenttyp
- Zeitschriftenartikel (244) (entfernen)
Sprache
- Englisch (218)
- Deutsch (23)
- Russisch (2)
- Mehrsprachig (1)
Schlagworte
- Nanoparticle (11)
- Fluorescence (10)
- Mechanochemistry (9)
- Quantum yield (8)
- Additive manufacturing (7)
- KorroPad (7)
- SAXS (7)
- Small-angle X-ray scattering (7)
- Korrosionsschnelltest (6)
- NIR (6)
- Nichtrostender Stahl (6)
- Passivschicht (6)
- Femtosecond laser (5)
- IR (5)
- Lifetime (5)
- Quantification (5)
- Residual stress (5)
- Computed tomography (4)
- Degradation (4)
- Fatigue strength (4)
- Fracture mechanics (4)
- In situ (4)
- Lanthanide (4)
- Laser-induced periodic surface structures (LIPSS) (4)
- Multiple crack propagation (4)
- Residual stresses (4)
- Upconversion (4)
- Alkali-silica reaction (3)
- Cast iron (3)
- Corrosion (3)
- Electron backscatter diffraction (3)
- Ellipsometry (3)
- Fatigue (3)
- Heat treatment (3)
- Initial crack size (3)
- Integrating sphere spectroscopy (3)
- Laser ablation (3)
- MAG welding (3)
- MALDI (3)
- MALDI-TOF MS (3)
- Method (3)
- Neutron diffraction (3)
- Phase transformation (3)
- Polylactides (3)
- Polymer (3)
- Raman spectroscopy (3)
- Ring-opening polymerization (3)
- Sensor (3)
- Short crack propagation (3)
- Silver nanoparticles (3)
- Steel (3)
- Welding (3)
- X-ray computed tomography (3)
- XRD (3)
- Absolute fluorometry (2)
- Aktive Thermografie (2)
- Biodiesel (2)
- Brightness (2)
- Broadband Dielectric Spectroscopy (2)
- Broadband dielectric spectroscopy (2)
- CCS (2)
- Carbon fiber reinforced polymer (2)
- Carbon nanotubes (2)
- Cell adhesion (2)
- Cladding parameter (2)
- Composites (2)
- Concrete (2)
- Crystallization (2)
- DNA origami (2)
- Design of experiments (2)
- Doped tin oxide (2)
- Dye (2)
- EBSD (2)
- Environment (2)
- Environmental stress cracking (ESC) (2)
- Epoxy resin (2)
- Femtosecond laser ablation (2)
- Gas sensing (2)
- Gefahrgutverpackung (2)
- Grain growth (2)
- High-strength steel (2)
- High-strength steels (2)
- ISO 6892-1 (2)
- Iron oxide (2)
- LIBS (2)
- Laser cladding (2)
- Laser metal deposition (2)
- Laser-induced periodic surface structures (2)
- Mechanical properties (2)
- Metal phosphonate (2)
- Microscopy (2)
- Microstructure (2)
- NMR (2)
- Nanocomposite (2)
- Nanocomposites (2)
- Nanocrystal (2)
- Nanoparticles (2)
- Nanostructures (2)
- Non-destructive testing (2)
- Oxidation (2)
- Pacemaker (2)
- Pipeline (2)
- Polyethylen (2)
- Polylactide (2)
- Polymorphism (2)
- Porosity (2)
- Principal component analysis (2)
- Process parameters (2)
- Quantum dot (2)
- Rammed earth (2)
- Reliability (2)
- Restraint (2)
- Semiconductor (2)
- Slow crack growth (SCG) (2)
- Spectroscopic ellipsometry (2)
- Surface chemistry (2)
- Thermography (2)
- Thin Films (2)
- Thin films (2)
- Titanium (2)
- Titanium alloy (2)
- ToF-SIMS (2)
- Transesterification (2)
- Wear (2)
- Welding simulation (2)
- Weldments (2)
- Wärmebehandlung (2)
- X-ray imaging (2)
- X-ray refraction (2)
- Zerstörungsfreie Prüfung (2)
- (Mn,Ga)As crystallites (1)
- 3D printing (1)
- 4'-hydroxyacetophenone (1)
- AC-nanochip calorimetry (1)
- AFM cantilever vibration (1)
- AFM intermittent contact (1)
- AFM tip shape (1)
- Aberfan flowslide (1)
- Abplatzen (1)
- Absolute flourescence (1)
- Absolute flourometry (1)
- Absolute fluoreometry (1)
- Accelerated time integration (1)
- Accuracy (1)
- Acoustic emissions analysis (1)
- Active and passive thermography (1)
- Active thermography (1)
- Additive Fertigung (1)
- Additive manufacturing, 3D printing (1)
- Adjustment calculation (1)
- Adsorption of phosphate (1)
- Ageing (1)
- Al-Cu-Li-Legierung (1)
- Alkali ingress (1)
- Aluminium (1)
- Aluminum alloy 2024-T3 (1)
- Amphiphilic dumbbells (1)
- Anodic oxidation (1)
- Antenna effect (1)
- Antifouling (1)
- Antiphase boundary (1)
- Aqdditive manufacturing (1)
- Aquifer (1)
- Arbeitsschutz (1)
- Archaeology (1)
- Artificial cells (1)
- Artificial turf (1)
- Artificial weathering (1)
- Assay (1)
- Asymmetric supercapacitor (1)
- Athletic tracks (1)
- Atomic force microscopy (1)
- Auger electron spectroscopy (1)
- Ausscheidungen (1)
- Axle (1)
- Azobenzene (1)
- BLE (1)
- BODIPY (1)
- Bacterial adhesion (1)
- Bacteroidetes (1)
- Ball milling (1)
- Behandlungsparameter (1)
- Berstprüfung (1)
- Biegefestigkeit (1)
- Biegesteifigkeit (1)
- Bio lubricants (1)
- Biocides (1)
- Bioconjugate (1)
- Biofilm (1)
- Biofilms (1)
- Biofuel cells (1)
- Biofuels (1)
- Biomass (1)
- Biomedical engineering (1)
- Biomineralization (1)
- Blockcopolymer (1)
- Bluetooth Low Energy (1)
- Bone tissue engineering (1)
- Bragg-edge imaging (1)
- Brake pad materials (1)
- Brand (1)
- Brass (1)
- Bremsleitung (1)
- Brithtness (1)
- Building materials (1)
- Building-blocks (1)
- CFK (1)
- CFRP (1)
- CO2-storage (1)
- Calcium alkali orthophosphate (1)
- Calcium phosphate (1)
- Calibration (1)
- Carbamazepine (1)
- Carbon fibre reinforced composite (1)
- Carbon fibres nanotubes interface (1)
- Carbon nanodots (1)
- Carbon storage (1)
- Carbon-based nanomaterials (1)
- Carbon-fluorine bonds (1)
- Casting skin (1)
- Catalysis (1)
- Catalysts (1)
- Cationization (1)
- CdSe (1)
- Cellular solids (1)
- Ceramics (1)
- Cermet (1)
- Chemical analysis (1)
- Chemicals classification (1)
- Chemometrics (1)
- Chlorbutylkautschuk (1)
- Circular dichroism (1)
- Climate simulation concrete prism test (1)
- Co-planar translational laminography (1)
- Cocrystal (1)
- Cocrystals (1)
- Colour center (1)
- Compatibility (1)
- Compatible solute (1)
- Complex formation (1)
- Complex structures (1)
- Component design (1)
- Compression (1)
- Compressive strength (1)
- Computational model for unsaturated flow (1)
- Computed thomography (1)
- Concrete pavement (1)
- Conductive carbon tape (1)
- Conductivity (1)
- Conductometry (1)
- Contamination (1)
- Continuum damage mechanics (1)
- Controlled radical polymerization (1)
- Coordination polymers (1)
- Copper (1)
- Correlative tomography (1)
- Corrosion fatigue (1)
- Corrosion resistance (1)
- Cr complex (1)
- Crack (1)
- Crack criterion (1)
- Crack detection (1)
- Crack driving force (1)
- Cracks (1)
- Creep (1)
- Critical micelle concentration (CMC) (1)
- Crystal phase determination (1)
- Crystal structure (1)
- Crystallography (1)
- Curing kinetics (1)
- Cuticle (1)
- Cyclic loading (1)
- Cyclic softening (1)
- Cyclopolymerization (1)
- Cysteine (1)
- C–C coupling (1)
- DNA (1)
- DSC (1)
- DSS (1)
- DSSC (1)
- Darkfield microscopy (1)
- Data correction (1)
- Data fusion (1)
- Decay time (1)
- Delamination (1)
- Dendrimersomes (1)
- Dendritic amphiphile (1)
- Dense alumina (1)
- Density functional theory (DFT) (1)
- Dentistry (1)
- Desiccation resistance (1)
- Dezincification (1)
- Dielectric materials (1)
- Dielectrics (1)
- Different electrochemical conditions (1)
- Different load cases (1)
- Differential scanning calorimetry (DSC) (1)
- Digital radiography (1)
- Dilatometry (1)
- Dislocations (1)
- Dispersity (1)
- Dissimilar welding (1)
- Distance transform (1)
- Doubly charged ions (1)
- Drehen (1)
- Druckkraft (1)
- Dual emission (1)
- Dual-environment (1)
- Ductile cast iron (1)
- Duplex stainless steel (1)
- Duplex stainless steels (1)
- Dynamic fracture mechanics (1)
- EM-clustering (1)
- EN 16807-2016:12 (1)
- EPR (1)
- EPS (1)
- ESI-TOF-MS (1)
- EXAFS (1)
- Earth block masonry (EBM) (1)
- Economic wide technology replacement (1)
- Ectoine (1)
- Effective irradiation dose 0.2-16 [Gy] (1)
- Elastomere (1)
- Electroceramics (1)
- Electrochemical behavior (1)
- Electromagnetic scattering (1)
- Electron back-scattered diffraction (1)
- Electron irradiation 30 [kV] (1)
- Electronic structure (1)
- Electrospray ionization polymers (1)
- Emission standards (1)
- Emission test chamber (1)
- Emissivity (1)
- Endurance limit (1)
- Energy efficiency (1)
- Energy input (1)
- Energy transfer (1)
- Entsorgung gefährlicher Stoffe (1)
- Epoxy (1)
- Equilibration (1)
- Etal-complexes (1)
- Ettringit (1)
- European Materials Research Society (E-MRS) (1)
- Excitation energy dependence (1)
- Excitation power density dependence (1)
- Excitation spectra (1)
- Exciton (1)
- External alkalis (1)
- External load test (1)
- FEA (1)
- FNCT (1)
- FRET (1)
- Fahrbahnbeton (1)
- Faserverbundwerkstoffe (CFK, GFK) (1)
- Fatigue assessment (1)
- Fatigue damage (1)
- Fatigue life time (1)
- Fatigue loading (1)
- Femtosecond laser processing (1)
- Ferritic/martensitic steel (1)
- Festigkeit (1)
- Festigkeitssteigerung (1)
- Feuchtetransport (1)
- Fiber-reinforced concrete (1)
- Fibre reinforced composites (1)
- Film (1)
- Finite element method (1)
- Finite element simulation (1)
- Fire (1)
- Flame retardants (1)
- Flammability (1)
- Flowability (1)
- Fluid transport (1)
- Fluorescence probe (1)
- Focused ion beam tomography (1)
- Force-distance curves (1)
- Fourier series (1)
- Fracture energy (1)
- Friction (1)
- Friction stir welding (1)
- Full notch creep test (FNCT) (1)
- Full-notch creep test (FNCT) (1)
- Fungi (1)
- GMR (1)
- Gas permeation (1)
- Gas separation (1)
- Gas separation membrane (1)
- Gas tungsten arc welding (1)
- Gel electrophoresis (1)
- Gel-type electrolytes (1)
- Gelartige Elektrolyte (1)
- Geothermal environment (1)
- Germylium ions (1)
- Glass-ceramic (1)
- Globally Harmonized System of Classification and Labelling of Chemicals (1)
- Glow discharge processes (1)
- Gold nanoparticles (1)
- Grain pest beetles (1)
- Graphen (1)
- Graphene (1)
- Graphene oxide (1)
- Graphit (1)
- Grating interferometry (1)
- Greenhouse gas mitigation (1)
- Gurson model (1)
- HPC (1)
- HSC (1)
- HSQ (1)
- Halbleiterphysik (1)
- Haltezeit (1)
- Hard object collisions (1)
- Hazardous chemicals (1)
- Heat flux estimation (1)
- Heat-affected zone (1)
- Heating (1)
- Heterogeneity (1)
- High Cycle Fatigue (HCF) (1)
- High ductility (1)
- High energy synchrotron diffraction (1)
- High power welding (1)
- High strength steel (1)
- High-density polyethylene (PE-HD) (1)
- Historical earthen building (1)
- Ho(III) (1)
- Hochleistungsbeton (1)
- Hot cracking (1)
- Hybrid laser arc welding (1)
- Hybrid laser-arc weld (1)
- Hybrid nanoparticles (1)
- Hydrodefluorination (1)
- Hydrogen embrittlement (1)
- Hydrogen trapping (1)
- Hydrogen-assisted cracking (1)
- Hyperbranched polymers (1)
- I-shape sections (1)
- Image-based analysis (1)
- Imaging (1)
- Impact behaviour (1)
- In situ PXRD (1)
- In situ XRD (1)
- In situ bending tests (1)
- In situ near-infrared (NIR) spectroscopy (1)
- Innovationsrecht (1)
- Integrating sphere (1)
- Intermetallic compound (1)
- Interpass temperature (1)
- Interphase (1)
- Inverse heat transfer problem (1)
- Iron oxide nanoparticles (1)
- Iron oxides (1)
- Iron-oxo oligomers (1)
- Irradiation (1)
- Irreversible polycondensation (1)
- Janus dendrimers (1)
- Keramik (1)
- Kikuchi patterns (1)
- Knoevenagel condensation (1)
- Kohlenstofffaserverstärkter Kunststoff (1)
- Korrosion (1)
- Krypton (1)
- Kupferlegierungen (1)
- LED phosphors (1)
- LPSO Phase (1)
- LTT (1)
- Lactides (1)
- Landslide propagation modelling (1)
- Laser Processing (1)
- Laser beam Welding (1)
- Laser heated pedestal growth (1)
- Laser implantation (1)
- Laser-induced breakdown spectroscopy (1)
- Laser-induced periodic surface structures, LIPSS (1)
- Laser-induced redox reactions (1)
- Laser-material interactions (1)
- Laserschweißen (1)
- Layer-wise slurry deposition (1)
- Leaching (1)
- Leakage (1)
- Lean duplex stainless steel (1)
- Lewis-acids (1)
- Life cycle assessment (LCA) (1)
- Life time prediction (1)
- Life-cycle assessment (1)
- Liftetime (1)
- Ligand (1)
- Light-harvesting (1)
- Limiting oxygen concentration (1)
- Liquid chromatography at critical conditions (1)
- Liquid petroleum products (1)
- Liquid phase sintering (1)
- Lizard (1)
- Load partition (1)
- Local critical strain (1)
- Lochkorrosion (1)
- Long-Term Monitoring (1)
- Longitudinal weld (1)
- Low blow (1)
- Low temperature (1)
- Low transformation temperature (1)
- Lubricant films (1)
- MALDI TOF MS (1)
- MEMS (1)
- MOF (1)
- Magnetic nanoparticles (1)
- Magnetic properties (1)
- Magnetic stray field (1)
- Mandible (1)
- Martensitic stainless steels (1)
- Mass spectrometry (1)
- Material (1)
- Materials characterization (1)
- Mechanism (1)
- Medical imaging (1)
- Melanised microcolonial fungi (MCF) (1)
- Mesoporous films (1)
- Metal matrix composite (1)
- Metastable (1)
- Method evaluation (1)
- Methodology (1)
- Methods (1)
- Mg-Y-Zn Alloy (1)
- Micelle (1)
- Micro-CT (1)
- Microalloyed steels (1)
- Microbial adhesion tests (1)
- Microcracking (1)
- Microcracks (1)
- Micromechanics model (1)
- Microstructure and texture (1)
- Mill scale (1)
- Milling (1)
- Model friction tests (1)
- Modeling (1)
- Modified spray arc (1)
- Moisture Measurement (1)
- Moisture clog (1)
- Moisture transport (1)
- Molecular mobility (1)
- Monitoring of damage (1)
- Morphology (1)
- Mouthguard (1)
- Multi-regional inputeoutput data (1)
- Multi-sample analysis (1)
- Multidimensional Spectroscopy (1)
- Müller Polarimetry (1)
- NMR spectroscopy (1)
- Nano (1)
- Nanoclays (1)
- Nanocluster (1)
- Nanocorrosion of aluminium and silicon (1)
- Nanoindentation (1)
- Nanokomposite (1)
- Nanophysik (1)
- Nanostructure (1)
- Nanostructured capacitors (1)
- Nanoviscosity (1)
- Nanowires (1)
- Neon (1)
- Network (1)
- Neutron Diffraction (1)
- Neutron imaging (1)
- Ni-Co oxide (1)
- Nickel-based superalloy (1)
- Nile Red (1)
- Niobcarbid (1)
- Niobium carbide (1)
- Nitrile rubber (1)
- Non-Destructive testing (1)
- Nonlinear (1)
- Notches (1)
- Novel optical measurement (1)
- Numerical inversion (1)
- Numerical simulation of welding (1)
- Numerische Simulation (1)
- Oligospiroketals (1)
- Online NMR spectroscopy (1)
- Optical Wavefield (1)
- Optoelektronik (1)
- Orientation distribution (1)
- Orientation mapping (1)
- Oxides (1)
- Oxyfuel (1)
- PEEK-Komposite (1)
- PET (1)
- PH (1)
- PIM-1 (1)
- PLGA cement (1)
- POD (1)
- POSS (1)
- Parameter Study (1)
- Partial safety factor (1)
- Particle (1)
- Particle architecture (1)
- Particle size (1)
- Particle size distribution (1)
- Particle size gradation (1)
- Pavement concrete (1)
- Perzyna viscoplasticity (1)
- Phosphine-ligands (1)
- Photo physics (1)
- Photocatalysis (1)
- Photon counting detectors (1)
- Photovoltaics (1)
- Physical ageing (1)
- Physical hazards (1)
- Piezopolarisation (1)
- Pitfalls (1)
- Pitting corrosion (1)
- Plasma polymers (1)
- Plasmid DNA pUC19 (1)
- Plasmonic absorption (1)
- Plasmonics (1)
- Plate girders (1)
- Polarity (1)
- Pollen (1)
- Poly(acrylic acid) (1)
- Poly- (hydroxyethylmethacrylate) (1)
- Polyacrylic acid (1)
- Polyamorphism (1)
- Polycaprolactone (1)
- Polyester (1)
- Polyester fabric strips (1)
- Polyethylene (PE-HD) (1)
- Polyethylenterephthalat (1)
- Polymer MALDI (1)
- Polymer based nanocomposites (1)
- Polymer degradation (1)
- Polymer-metal (1)
- Polymerization (1)
- Polymers of intrinsic microporosity (1)
- Polymorphic transition (1)
- Polymorphs (1)
- Polysaccharides (1)
- Polystyrene (1)
- Porosimetry (1)
- Porous film (1)
- Porous materials (1)
- Post-welding Imperfections (1)
- Powder diffraction (1)
- Pre-Columbian ceramics (1)
- Preceramic polymers (1)
- Probe (1)
- Process innovations (1)
- Projective geometry (1)
- Protein (1)
- Pseudo-dynamic loads (1)
- Pseudobrookite (1)
- Pullulan (1)
- Pyrazinamide (1)
- Quantum Yield (1)
- Quantum rod (1)
- Quantum yield standard (1)
- Quenching and partitioning (1)
- R-curve (1)
- RSSI (1)
- Radioprotector ectoine (1)
- Rapid prototyping (1)
- Reduced graphene oxide (1)
- Reference material (1)
- Reference materials (1)
- Refractive index (1)
- Repair welding (1)
- Residual Stresses (1)
- Resistance (1)
- Resonance (1)
- Resonance testing (1)
- Reverse time migration (1)
- Rheology (1)
- Ring-expansion polymerization (1)
- Rissbildung (1)
- Rock-art caves (1)
- Room-temperature (1)
- Rope (1)
- Rubber (1)
- Rubber granules (1)
- Rust (1)
- Röntgen-3D-Computertomographie (1)
- SA508 (1)
- SEM–EDS/EBSD (1)
- SERS (1)
- SHPB (1)
- SPH (1)
- STEM/TEM imaging (1)
- Sample pretreatment (1)
- Saxs (1)
- Scaffold (1)
- Scanning nano beam electron diffraction (1)
- Scanning transmission electron microscopy (STEM) (1)
- Scattering (1)
- Scattering Theory (1)
- Schneidstoff (1)
- Schneidwaren (1)
- Sealing materials (1)
- Selective laser melting (1)
- Self-assembled structures (1)
- Semiconductor quantum dot (1)
- Shape memory polymer (1)
- Shear test (1)
- Shear-compression tests (1)
- Shell (1)
- Shock absorbtion (1)
- Shore hardness (1)
- Shrinkage (1)
- Silica (1)
- Silica nanowires (1)
- Silicate glasses (1)
- Silicon (1)
- Silver (1)
- Simulation (1)
- Single crystal fiber (1)
- Sinter/sintering (1)
- Sliding friction (1)
- Small-angle x-ray scattering (1)
- Sn catalysts (1)
- Soft matter (1)
- Solidification cracking (1)
- Soyean oil (1)
- Spalling (1)
- Spannungsrissbeständigkeit (1)
- Specific heat spectroscopy (1)
- Specific surface (1)
- Spectroelectrochemistry (1)
- Spectroscopic ellipsomety (1)
- Sphingan (1)
- Spontane Polarisation (1)
- Spot welding (1)
- Spot welds (1)
- Spring Meeting 2016 (1)
- Stabilising agents (1)
- Stability (1)
- Standard (1)
- Standards (1)
- Stapeldruckprüfung (1)
- Starch (1)
- Static monitoring (1)
- Steam (1)
- Steel reinforced concrete (1)
- Stern Geary constant (1)
- Stern-Geary-Konstante (1)
- Stofftransport (1)
- Strengthening (1)
- Stress-strain behavior (1)
- Strontium yttrate (1)
- Structural Health Monitoring (1)
- Structural integrity (1)
- Structural properties (1)
- Structural relaxation (1)
- Structure solution (1)
- Sub-aerial biofilms (SAB) (1)
- Substitute model (1)
- Sulfobetaines (1)
- Supercapacitor (1)
- Superconducting magnets (1)
- Superconductor (1)
- Supercritical CO2 (1)
- Superparamagnetic nanoparticles (1)
- Superplasticity (1)
- Supra molecular polymerization (1)
- Surface analysis (1)
- Surface coating (1)
- Surface functionalization (1)
- Surface plasmon (1)
- Surface plasmon polariton (1)
- Surface plasmon resonance (1)
- Surface structuring (1)
- Surface tension (1)
- Surface texture (1)
- Surface treatment (1)
- Surface wetting (1)
- Sustainability assessment (1)
- Symbiosis (1)
- Synchrotron X-ray diffraction (1)
- Synchrotron, BAMline (1)
- Synthesis (1)
- TEM (1)
- TENSTAND WP4 Final Report (1)
- TENSTAND WP4 Report (1)
- TIG-welding (1)
- TKD (1)
- TMF (1)
- Talbot-Lau interferometer (1)
- Tandem gas metal arc welding (1)
- Tandem welding (1)
- Target plate material (1)
- Technikrecht (1)
- Temper (1)
- Temperature (1)
- Tensile behavior (1)
- Tensile loading (1)
- Tensile properties (1)
- Tensile strength (1)
- Tensile testing procedure (1)
- Test methods (1)
- Testing (1)
- The charge transfer and ionization process (CTI) (1)
- Theory (1)
- Thermal desorption spectrometry (TDS) (1)
- Thermal diffusivity (1)
- Thermal softening (1)
- Thermische Diffusivität (1)
- Thermo-mechanical fatigue (1)
- Thermomechanical Fatigue (TMF) (1)
- Thermomechanical fatigue (1)
- Thermoresponsive polymers (1)
- Thermoresponsive polymres (1)
- Thick films (1)
- Thin film metrology (1)
- Thin polymeric films (1)
- Thiol (1)
- Three-dimensional printing (1)
- Ti-6Al-4V (1)
- TiO2 (1)
- Time-of-flight secondary ion mass spectrometry (1)
- Tin catalysts (1)
- Titanite (1)
- Titanium alloys (1)
- Titanium dioxide (1)
- Titanium nitride films (1)
- Tnsile testing (1)
- Top-down (1)
- Trabecular structures (1)
- Transfer layer (1)
- Transformable steels (1)
- Transformation induced plasticity (1)
- Transmission Kikuchi diffraction (1)
- Transparent conductive oxides (1)
- Transport processes (1)
- Trinkwasser (1)
- UCST-type copolymer (1)
- UHMWPE (1)
- UN-GHS (1)
- UV radiation (1)
- UV/Vis and emission spectroscopy (1)
- Ultra thin polymer films (1)
- Ultra-Hochleistungsbeton (1)
- Ultrafast microscopy (1)
- Ultrasonic (1)
- Ultrasonic echo technique (1)
- Ultrasonic velocity (1)
- Uncertainty (1)
- Upconverion (1)
- VOC (1)
- Vakuum (1)
- Vapor-phase hydrofluorination (1)
- Vertebral (1)
- Vinyl fluoride (1)
- Void nucleation & growth (1)
- Volatile organic compound (1)
- Volumenbruchteil (1)
- Vorlagerungszeit (1)
- Vulcanisation system (1)
- Wasserstoff (1)
- Water oxydation catalysis (1)
- Weld filler (1)
- Welded Plate Girders (1)
- Welding residual stress (1)
- Welding residual stresses (1)
- Werkstofffragen (1)
- Widerstandspressschweißen (1)
- Widerstandspunktschweißen (1)
- X-ray CT (1)
- X-ray absorption fine structure (1)
- X-ray absorption near-edge structure (1)
- X-ray computer tomography (1)
- X-ray diffraction (1)
- X-ray diffractometry (XRD) (1)
- X-ray phase contrast (1)
- XAFS (1)
- XANES (1)
- XPS (1)
- Yb(III) (1)
- Yellowness index (1)
- Young's modulus (1)
- Young’s modulus (1)
- Zinc (1)
- Zinc(II) complexes (1)
- Zink (1)
- Zn-Fe-Zr nanoparticles (1)
- Zonierung (1)
- Zr(iV) compounds (1)
- biomineralization (1)
- calcium carbonate (1)
- martensitisch (1)
- microwave synthesis (1)
- nanoparticles (1)
- nichtrostender Stahl (1)
- nucleation (1)
- photocatalysis (1)
- polymer additives (1)
- µCT (1)
- α-1,4- and α-1,6-glucans (1)
- β-eucryptite (1)
Evaluating innovative process technologies has become highly important within the last decades. As standard tools different Life Cycle Assessment methods have been established, which are continuously improved. While those are designed for evaluating single processes they run into difficulties when it comes to assessing environmental impacts of process innovations at macroeconomic level. In this paper we develop a multi-step evaluation framework building on multi regional inputeoutput data that allows estimating macroeconomic impacts of new process technologies, considering the network characteristics of the global economy.
Our procedure is as follows: i) we measure differences in material usage of process alternatives, ii) we identify where the standard processes are located within economic networks and virtually replace those by innovative process technologies, iii) we account for changes within economic systems and evaluate impacts on emissions.
Within this paper we exemplarily apply the methodology to two recently developed innovative technologies: longitudinal large diameter steel pipe welding and turning of high-temperature resistant materials. While we find the macroeconomic impacts of very specific process innovations to be small, its conclusions can significantly differ from traditional process based approaches. Furthermore, information gained from the methodology provides relevant additional insights for decision makers extending the picture gained from traditional process life cycle assessment.
Zum Vergleich der Polyethylenformstoffe für eine Bauart von Gefahrgutverpackungen und IBC wurden die Materialkennwerte: Schmelze-Massefließrate MFR, Dichte D, Kerbschlag-zähigkeit acN bei -30 °C, Spannungsrissbeständigkeit (bestimmt mit dem Full Notch Creep Test) und Beständigkeit gegen oxidativen Abbau Ox (bestimmt durch den prozentualen Anstieg des MFR in Salpetersäure) in der DIN EN 15507 – Verpackung – Verpackungen zur Beförderung gefährlicher Güter – Vergleichende Werkstoffprüfung von Polyethylensorten ausgewählt.
Das Ziel der Untersuchungen war die Auswahl eines Kennwertes für die Bestimmung des mechanischen Leistungsniveaus von Polyethylenformstoffen, da unter Druck Verpackungen beulen oder knicken. Zur Auswahl standen drei Prüfverfahren:
a) Bestimmung der Biegesteifigkeit S nach DIN 53 350 (Prinzip von Ohlsen).
b) Bestimmung der Biegefestigkeit σfM und Biegedehnung ɛfM nach DIN EN ISO 178
c) Bestimmung der Druckkraft Fmax und Verformung dL bei Fmax nach DIN EN ISO 604.
Die Prüfmethode zur Bestimmung der Biegesteifigkeit nach DIN 53 350 eignet sich zum Vergleich des mechanischen Leistungsniveaus der Formstoffe. Zur Verbesserung der Reproduzierbarkeit der Ergebnisse sollte der Skalierungsbereich der Prüfapparatur erweitert wer-den, um genauere Messergebnisse zu erzielen.
Der Dreipunktbiegeversuch nach DIN EN ISO 178 eignet sich bei verformungsfähigen Kunststoffen, wie dem Polyethylen, zur Bestimmung der Biegefestigkeit σfM. Dieser Ver-such besitzt den Nachteil, dass am Ort des maximalen Biegemoments in der Randschicht, wo auch die maximale Biegespannung erzeugt wird, zusätzlich der Biegestempel angreift.
Die Messergebnisse haben gezeigt, dass die Druckprüfung nach DIN EN ISO 604 sich sehr gut zur Bewertung des mechanischen Verhaltens der Polyethylenformstoffe unter Druckbelastung (Stapeldruckprüfung der Verpackungen) eignet.
The quantum yield is a critically important parameter in the development of lanthanide-based upconverting nanoparticles (UCNPs) for use as novel contrast agents in biological imaging and optical reporters in assays. The present work focuses on the influence of the beam Profile in measuring the quantum yield (f) of nonscattering dispersions of nonlinear upconverting probes, by establishing a relation between f and excitation light power density from a rate equation analysis. A resulting 60% correction in the measured f due to the beam profile utilized for excitation underlines the significance of the beam profile in such measurements, and its impact when comparing results from different Setups and groups across the world.
A set of highly fluorescent, pH-responsive boron dipyrromethene dyes covering the pH range of 5-12 is presented for broad range pH measurements in mixed aqueous-organic median and polymer matrices. Readout in the intensity Domain with low cost and miniaturized Instrumentation utilizes reversible protonation induced switching ON of their initially completely quenched flourescence mediated by photoinduced electron Transfer. All dyes, rationally designed to reveal closely matching Absorption and Emission properties, are accessible via facile two-step reactions in Overall yields of up to 20%. By modifying the Substitution pattern of the meso-Aryl substiuent, the pKa values could be fine-tuned from 6 to 11. Integration of these molecules into polymeric films by a simple mixing procedure yielded reversible and longterm stable pH sensors for naked eye detection.
New fluorinated coordination polymers were prepared mechanochemically by milling the alkaline earth metal hydroxides MII(OH)2·xH2O (MII: Ca, Sr) with tetrafluoroisophthalic acid (H2mBDC-F4). The structures of [{Ca(mBDC-F4)(H2O)2}·H2O] and [{Sr(mBDC-F4)(H2O)2}·H2O] were determined based on ab initio calculations and their powder X-ray diffraction (PXRD) data. The compounds are isomorphous and crystallize in the orthorhombic space group P212121. The determined structures were validated by using extended X-ray absorption (EXAFS) data. The new materials were thoroughly characterized using elemental analysis, thermal analysis, magic angle spinning NMR, and attenuated total reflection-infrared spectroscopy. Further characterization methods such as BET, dynamic vapor sorption, and scanning electron microscopy imaging were also used. Our investigations indicate that mechanochemistry is an efficient method for preparing such materials.
The paper presents an attempt for the calibration of an active
thermography method that is suitable for the non-destructive
evaluation of spot welds. Nowadays, the quality of spot welds is
commonly characterised by the application of random chisel tests,
which are time consuming, expensive and destructive. Recently a
non-destructive testing method by means of active thermography
was proposed that relies on the fact that the mechanical connection
formed by the spot weld also serves as a thermal bridge between
the two steel sheets joined in the welding process. It is shown in this
paper that this thermal bridge can be thermographically characterised
by extracting a measure for the spot weld diameter and hence the
quality of the spot weld. The determination of the absolute value
of the diameter hereby relies on a calibration of the testing system,
which is performed by means of X-ray computed tomography in this
study. The experiments were carried out using different experimental
approaches, namely transmission as well as reflection geometry
wSetup in reflectionith laser illumination. A comprehensive evaluation
of samples produced using different welding currents, hence different
quality, was carried out in order to validate the thermographic results.
Carbon nanotube-grafted carbon fiber polymer composites: Damage characterization on the micro scale
(2017)
Multiwall carbon nanotubes (CNTs) e carbon fibers (CFs)hybrid materials were produced by directly growing CNTs on CFs by means of chemical vapor deposition. For the latter, the oxidative dehydrogenation reaction of C2H2 and CO2 was applied, which allows growing CNTs without damaging the CF surface. Uni-directional nano-engineered carbon fiber reinforced composites (nFRCs) were fabricated by impregnating these hybrid materials with epoxy. The nFRCs subjected to single fiber push-out tests revealed a decrease of the interfacial shear strength (IFSS) of about 36% compared to the carbon fiber composites without CNTs. By means of transverse three-point bending tests performed on pre-notched composite beams inside a scanning electron microscope, the fracturing behavior parallel to the fibers was studied in-situ. The nFRCs showed significantly reduced fiber/matrix debonding while CNTs pull-out, CNTs bridging as well as matrix failure occurred. These results demonstrate that the presence of CNTs in nFRCs affects the stress distribution and consequently the damage Initiation as well as the damage propagation. The presence of CNTs suppresses the stress concentration at the fiber/Matrix interface and reduces the debonding of CFs from the matrix. However, our results indicate that the stress concentration shifts towards the CNTs' ends/matrix interface and causes promoted matrix failure leading to lower IFSS.
Environmental and sustainable economical concerns are generating a growing interest in biofuels predominantly produced from biomass. It would be ideal if an energy conversion device could directly extract energy from a sustainable energy resource such as biomass. Unfortunately, up to now, such a direct conversion device produces insufficient power to meet the demand of practical applications. To realize the future of biofuel-fed fuel cells as a green energy conversion device, efforts have been devoted to the development of carbon-based nanomaterials with tunable electronic and surface characteristics to act as efficient metal-free electrocatalysts and/or as supporting matrix for metal-based electrocatalysts. We present here a mini review on the recent advances in carbon-based catalysts for each type of biofuel-fed/biofuel cells that directly/indirectly extract energy from biomass resources, and discuss the challenges and perspectives in this developing field
A combined methodical approach is tested with respect to the characterization of the inner structure of porous TiO2 layers as typically used in modern dye sensitized solar cells (DSSC). Their performance is directly linked to the surface area of the pore network. The micrometer thick layer employed was manufactured by screen-printing of a starting TiO2 powder constituted of shape-controlled, bipyramidal anatase nanoparticles on FTO/glass substrates. The analytical methods exploited in our study are Focused Ion Beam (FIB) slicing followed by 3D reconstruction as well as the new approach transmission Kikuchi diffraction (TKD) technology in the scanning electron microscope (SEM). Size and shape distribution of the TiO2 NPs within the layer can be extracted. SEM in transmission mode and atomic force microscopy (AFM) have been used to verify the dimensional data obtained by the new combined methodical approach. Its analytical benefits but also the challenges and limitations are highlighted.