Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Erscheinungsjahr
- 2016 (207) (entfernen)
Dokumenttyp
- Zeitschriftenartikel (177)
- Beitrag zu einem Tagungsband (27)
- Buchkapitel (3)
Referierte Publikation
- ja (207) (entfernen)
Schlagworte
- Mechanochemistry (8)
- Corrosion (5)
- Nanocomposite (5)
- Hydrogen embrittlement (4)
- Wear (4)
- XRD (4)
- Additive manufacturing (3)
- Duplex stainless steel (3)
- Dye (3)
- EBSD (3)
- Friction (3)
- Graphene (3)
- Hydrogen (3)
- In situ (3)
- Laser beam welding (3)
- Low alloy steels (3)
- Mechanical properties (3)
- Metal phosphonate (3)
- Microstructure (3)
- Modeling (3)
- NDT (3)
- Nanoparticle (3)
- Nanoparticles (3)
- Oxidation (3)
- POD (3)
- Radiography (3)
- Rheology (3)
- Rubber (3)
- SAXS (3)
- SEM (3)
- Silver nanoparticles (3)
- Steel (3)
- Tribofilm (3)
- cocrystal (3)
- Assay (2)
- Atom transfer radical polymerization (2)
- Casting (2)
- Central venous access port (2)
- Complication (2)
- Compression (2)
- Computed tomography (2)
- Degradation (2)
- EDX (2)
- Electromagnetic weld pool control (2)
- FEM (2)
- Femtosecond laser ablation (2)
- Flame retardancy (2)
- Fluorescence (2)
- Heat affected zone (2)
- Hybrid composite (2)
- Impurities (2)
- Isotope dilution analysis (2)
- Kinetics (2)
- LTCC (2)
- Laser (2)
- Laser-induced periodic surface structures (LIPSS) (2)
- MAG welding (2)
- MOF (2)
- Online monitoring (2)
- Phase transformation (2)
- Polymer (2)
- Polymer matrix composite (2)
- Portland cement (2)
- Quantification (2)
- Residual stress (2)
- SEC (2)
- Silica nanoparticles (2)
- Silicon nanowire (2)
- Simulation (2)
- Strength (2)
- Titanium alloy (2)
- ToF-SIMS (2)
- Transmission electron microscopy (2)
- Vacuum (2)
- Welding (2)
- benzamide (2)
- in situ (2)
- mechanochemistry (2)
- theophylline (2)
- tribofilm (2)
- 2-D Welding Simulation (1)
- 2Disk (1)
- 3D (1)
- 3D printing (1)
- AA2024-T3 (1)
- AFM (1)
- Abrasive wear (1)
- Activatable probe (1)
- Active thermography (1)
- Adhesion (1)
- Advanced applications (1)
- Advanced ceramic (1)
- Ag nanoparticles (1)
- Ageing (1)
- Aggregation (1)
- Aging (1)
- Airtight building (1)
- Al-TM-RE (1)
- Al-alloy (1)
- Aldrithiol (1)
- Alkaline digestion reaction (1)
- Alloy addition (1)
- Aluminium (1)
- Aluminium alloys (1)
- Aluminum alloy (1)
- Amine derivatives (1)
- Amorphous materials (1)
- Anti-oxidative efficiency (1)
- Antioxidant (1)
- Aqueous dispersion (1)
- Artificial hip joint (1)
- Artificial photosynthesis (1)
- Associated incidental substances (1)
- Austenitic stainless steels (1)
- Automation Bias (1)
- Average phase stress concentrations (1)
- BAM-Fallhammer (1)
- BAMline (1)
- BDS broadband dielectric spectroscopy (1)
- BODIPY (1)
- BRET/CRET (1)
- Ball milling (1)
- Balls-on-flat (1)
- Balls-on-rod (1)
- Bearing (1)
- Benzamide (1)
- Beständigkeit (1)
- Beta-Eucryptite (1)
- Bioceramics (1)
- Biodiesel (1)
- Bioerosion (1)
- Biofilm (1)
- Bisphenol A (1)
- Block copolymer (1)
- Bone implant (1)
- Bone marrow extrusion (1)
- Borate glasses (1)
- Boratgläser (1)
- Braking event (1)
- Bremsstrahlung (1)
- Brittle materials (1)
- Brominated carbon nanotubes (1)
- Brushite-forming calcium phosphate cement (1)
- Building materials (1)
- Butt welds (1)
- CALPHAD approach (1)
- CCS (1)
- CFD simulation (1)
- CFRP (1)
- CMT welding (1)
- CNTs (1)
- COOH rich surfaces (1)
- Calcium phosphate coating (1)
- Calcium-carbonate (1)
- Carbon arc-air gouging (1)
- Carbon fibers (1)
- Carbon nanotubes (1)
- Carbonate substrate (1)
- Catalysis (1)
- Catalytic activity (1)
- Catheters (1)
- Cellular solids (1)
- Cellular uptake (1)
- Cement injection (1)
- Cement paste (1)
- Ceramic materials (1)
- Ceramics (1)
- Chalcogenides (1)
- Channeling (1)
- Characterization (1)
- Characterization and analytical techniques (1)
- Charge transfer (1)
- Charring (1)
- Chemotherapy (1)
- Chiral (1)
- Clad steels (1)
- Climate control through building elements (1)
- Clinker relicts (1)
- Co-firing (1)
- Coarse-grained heat-affected zone (1)
- Coatings (1)
- Cobalt (1)
- Cocrystal (1)
- Cold metal transfer process (1)
- Cold rolling (1)
- Color coding (1)
- Column percolation (1)
- Combined non-linear hardening with cyclic loading (1)
- Composite (1)
- Composite materials (1)
- Composition (1)
- Compression set (1)
- Computational mechanics (1)
- Computed tomography (CT) (1)
- Confinement (1)
- Constitutive equation (1)
- Contaminated soils (1)
- Cooling rate (1)
- Copolyester (1)
- Copolymer sequence (1)
- Copper (1)
- Corrosion investigations (1)
- Corrosion monitoring (1)
- Corrosion resistance (1)
- Counterpart materials (1)
- Cracks grouting (1)
- Creep (1)
- Creep resisting materials (1)
- Critical distance (1)
- Crosslinking (1)
- Crystal-growth (1)
- Crystallinity (1)
- Crystallization (1)
- Curing kinetics (1)
- Cyanine (1)
- Cyanophenyl molecules (1)
- Cyclic R-curve (1)
- Cyclics (1)
- Cyclization (1)
- DICTRA modeling (1)
- DIP transfer (1)
- DLO (1)
- DLS (1)
- DMA (1)
- DNA (1)
- DNA/RNA (1)
- DSC (1)
- Damage (1)
- Damage variable (1)
- Data fusion (1)
- Decarburization (1)
- Deep reactive ion etching (1)
- Defect density (1)
- Defects (1)
- Density of states (1)
- Depth profiling (1)
- Dichtungswerkstoffe (1)
- Dielectric properties (1)
- Differential scanning calorimetry (1)
- Differential scheme (1)
- Digital image correlation (DIC) (1)
- Digitale Bildkorrelation (DIC) (1)
- Dilution (1)
- Dipole polarisation (1)
- Dispersion (1)
- Dispersity (1)
- Dissimilar joint (1)
- Dissimilar joints (1)
- Double punch test (DPT) (1)
- Double-pulse experiments (1)
- Dual-core fibre (1)
- Ductile damage (1)
- DySEM (1)
- Dynamic glass transition (1)
- Dynamic pressures (1)
- Dynamic testing (1)
- Dynamische Tests (1)
- E10 (1)
- EDS (1)
- EVA (1)
- Earthen construction (1)
- Eigenvalue problem derivatives (1)
- Einseitenschweißung (1)
- Elastic behavior (1)
- Elastic-moduli (1)
- Electrohydraulic effect (1)
- Electromagnetic Force (1)
- Electromagnetic weld pool support (1)
- Electron backscatter diffraction (1)
- Electron transport (1)
- Electrostatic filter ash (1)
- Elevated temperatures (1)
- Ellipsometry (1)
- Ellman (1)
- Endurance testing (1)
- Energy efficiency (1)
- Energy transfer (1)
- Epoxy (1)
- Epoxy composites (1)
- Epoxy resin (1)
- Epoxy resins (1)
- Epoxy system (1)
- Ex vivo (1)
- Exfoliation (1)
- Experimental kinetics (1)
- Explosion protection (1)
- Explosions (1)
- Extrapolation (1)
- FEA (1)
- FIB (1)
- FIB patterning (1)
- FT-IR spectroscopy (1)
- Factor analysis (1)
- Failure probability (1)
- Fatigue crack (1)
- Fe3O4 nanoparticles (1)
- Femtosecond laser (1)
- Fenton (1)
- Ferrite (1)
- Ferrite integration (1)
- Ferromagnetic steel (1)
- Feuerwiderstand (1)
- Finit Element Method (1)
- Finite element analysis (1)
- Finite element method (1)
- Finite element modelling (1)
- Finite-element simulation (1)
- Fire engineering (1)
- Fire exposure (1)
- Fire residue (1)
- Flammability limits (1)
- Flash temperature (1)
- Fluid-rock interactions (1)
- Fluorapatite-gelatin nanocomposites (1)
- Fluorescence spectroscopy and imaging (1)
- Foot crack (1)
- Fracture-Toughness (1)
- Fresh Concrete (1)
- Full penetration welding (1)
- Fullerene C60 (1)
- Functionalization (1)
- Fungi (1)
- GFRP (1)
- GMA surfacing (1)
- GMAW (1)
- GTA welding (1)
- GaAs (1)
- GaP (1)
- Gear (1)
- Gel-type electrolytes (1)
- Geopolymerbeton (1)
- Geosynthetics (1)
- Girders (1)
- Glass transition (1)
- Glazed tiles (1)
- Gleeble experiments (1)
- Gold (1)
- Graphite (1)
- Guided waves (1)
- HR-SEM (1)
- Hardness (1)
- Hardystonite (1)
- Hartmann effect (1)
- Heat treatment (1)
- Heat-affected zone softening (1)
- High performance liquid chromatography (1)
- High power welding (1)
- High pressure oxygen (1)
- High strength steels (1)
- High temperature behaviour (1)
- High temperatures (1)
- High- viscosity PMMA cement (1)
- High-Strength Steel (1)
- High-power Laserbeam Welding (1)
- High-resolution (1)
- High-strength low-alloy steel (1)
- Hochtemperatureigenschaften (1)
- Hot cracking (1)
- Hot spot (1)
- Human Factors (1)
- Human factors (1)
- Hydrates (1)
- Hydrogen assisted cracking (1)
- Hygroscopic earthen and wooden materials (1)
- ICP-MS (1)
- Ignition source (1)
- Imaging (1)
- Imaging ellipsometry (IE) (1)
- Imaging technique (1)
- Imperfektion (1)
- In situ reactions (1)
- In vitro tests (1)
- In vivo (1)
- Incident research (1)
- Incoming goods control (1)
- Inconel 718 (1)
- Inertisation (1)
- Infection (1)
- Infrared thermography (1)
- Inherent Strain (1)
- Inhibition rate constant (1)
- Innovation (1)
- Insoluble content (1)
- Integrated analysis (1)
- Intergranular strength (1)
- Interpass temperature (1)
- Inverse problem (1)
- Ionic liquid (1)
- Iron alloys (1)
- Irradiation (1)
- Isothermal (1)
- Katalysator (1)
- Katoite (1)
- Kirchhoff migration (1)
- Knowledge spillovers (1)
- KorroPad (1)
- Kraftstoffe mit und ohne biogene Anteile (1)
- LCA (1)
- LTT (1)
- Lactide (1)
- Large animal model (1)
- Laser ablation (1)
- Laser beam weliding (1)
- Laser metal deposition (1)
- Laser processing (1)
- Laser thermography (1)
- Laser welding (1)
- Laser-induced fixation (1)
- Laser-induced periodic surface structures, LIPSS (1)
- Laser-thermal shock (1)
- Lattice (1)
- Leakage (1)
- Least-squares adjustment (1)
- Lebensdauerabschätzung (1)
- Lifetime prediction (1)
- Ligands (1)
- Lime based grout (1)
- Line scan (1)
- Load Partition (1)
- Local structural transformations (1)
- Long-Term Behaviour (1)
- Lorentz force (1)
- Low emissions (1)
- Low wear/high wear transition (1)
- Lubricant (1)
- MAG Welding (1)
- MALDI mass spectrometry (1)
- MALDI-TOF MS (1)
- MALDI-TOF MS/MS (1)
- MOFs (1)
- Mach-Zehnder interferometer (1)
- Magnesium alloys (1)
- Magnetic nanocomposites (1)
- Magnetische Nanopartikel (1)
- Magnetite nanoparticles (1)
- Magnetron sputtering (1)
- Maintenance (1)
- Mapping (1)
- Marangoni flow (1)
- Market access (1)
- Martensitic stainless steels (1)
- Mass spectrometry (1)
- Material parameter identification (1)
- Material sciences (1)
- Matrix influence (1)
- Mechanical testing (1)
- Melamine poly(metal phosphate) (1)
- Membrane (1)
- Meso Portland cement (1)
- Metal Gasket (1)
- Metal Matrix Composites (1)
- Metal Seal (1)
- Metal magnetic memory (1)
- Metallic glass (1)
- Mg1-xZnxTiO3 (1)
- Micro-asperity (1)
- Micro-computed tomography (1)
- Microalloyed Steels (1)
- Microalloyed steels (1)
- Microcracking (1)
- Microfluidics (1)
- Micromechanics (1)
- Microwave frequency (1)
- Milling (1)
- Mineral additions (1)
- Miniaturization (1)
- Mixture composition (1)
- Modal analysis (1)
- Mode-tracing (1)
- Model and measurement based analysis (1)
- Model of constant adiabatic flame temperatures (CAFT) (1)
- Modelling (1)
- Modulus (1)
- Molecular beacon (1)
- Molecular diagnostics (1)
- Molecular dynamics (1)
- Molecular-dynamics (1)
- Movable cellular automata (1)
- Multi-attribute decision method (1)
- Multi-criteria decision support (1)
- Multi-walled carbon nanotubes (1)
- Multicomponent diffusion (1)
- Multilayer (1)
- Multilayer graphene (1)
- Multiplexing immunoassay (1)
- Nano (1)
- Nanocalorimetry (1)
- Nanocomposites (1)
- Nanoconfinement (1)
- Nanolayer (1)
- Nanosilver (1)
- Nanostructures (1)
- Nanotechnology (1)
- Natural convection (1)
- Natural ventilation (1)
- Nb12O29 (1)
- Nb2O5 (1)
- Neutron Diffraction (1)
- Neutron imaging (1)
- Neutron radiography (1)
- Nickel alloys (1)
- Nicotinamide (1)
- Niobium oxide (1)
- Nnetwork (1)
- Non-Destructive Testing (1)
- Non-propagating cracks (1)
- Nondestructive evaluation (1)
- Nondestructive flaw detection (1)
- Nonlinear directional coupler (1)
- Nonlinearity (1)
- Nonmetallic material (1)
- Notch fatigue (1)
- Notch sensitivity (1)
- Nucleation (1)
- Numerical Simulation (1)
- Numerical simulation (1)
- Offshore-Windenergieanlage (1)
- Oil diesel fraction (1)
- Oil lubrication (1)
- Optical microscopy (OM) (1)
- Optical properties (1)
- Optical spectroscopy (1)
- Orientation description (1)
- Oxide-films (1)
- Oxygen pressure surge (1)
- Oxygen-containing functionalities (1)
- PEEK (1)
- PIM-1 (1)
- Paper sludge combustion ash (1)
- Passive layer (1)
- Phase grating (1)
- Phase transformation temperature (1)
- Phased array ultrasonic testing (1)
- Phosphates (1)
- Photoelectron spectroscopy (1)
- Photogrammetry (1)
- Photoligation (1)
- Photonic crystal fibre (1)
- Photovoltaic cell encapsulation (1)
- Picosecond acoustic (1)
- Pipeline design (1)
- Pipeline inspection (1)
- Plasma deposited polymers (1)
- Plasma polymerization (1)
- Plasma processing (1)
- Plasma-chemical technique (1)
- Plasticity-based Analysis (1)
- Poloxazolines (1)
- Poly(acrylic acid) (1)
- Poly(glycidyl methacrylate) (1)
- Polycarbonate (1)
- Polycondensation (1)
- Polyelectrolyte (1)
- Polyesters (1)
- Polyethylene composites (1)
- Polymer matrix (1)
- Polymorphism (1)
- Polymorphs (1)
- Pores (1)
- Porous medium (1)
- Portlandite (1)
- Preceramic Polymers (1)
- Pressure vessel steels (1)
- Printing (1)
- Probability of detection (1)
- Protein coating (1)
- Protein corona (1)
- Pull-out (1)
- Pull-out tests (1)
- Pulsed laser treatment (1)
- Purification (1)
- Pyrolysis (1)
- QT steel (1)
- Quantitative damage measurement (1)
- Quantum yield (1)
- R&D (1)
- Railway rails (1)
- Raman microspectroscopy (1)
- Raman spectroscopy (1)
- Rate of model oxidation (1)
- Re-XANES (1)
- Reaction Stress (1)
- Real-time operation (1)
- Reference material (1)
- Referenced spectroscopic ellipsometry (RSE) (1)
- Regulation (1)
- Reinforced composites (1)
- Reinforced epoxy composites (1)
- Reinforcement (1)
- Relaxation (1)
- Release (1)
- Reliability (1)
- Repair and overhaul (1)
- Repair welding (1)
- Representative volume element (1)
- Residual Stresses (1)
- Residual lifetime (1)
- Residual stresses (1)
- Restraint (1)
- Reverse-time migration (1)
- Rheometer (1)
- Rolling contact fatigue (1)
- Roman cement (1)
- Ru dye sensitizer (1)
- S-phase (1)
- Sample changer (1)
- Scaled Boundary Finite Element Method (1)
- Scanning Kelvin probe (1)
- Scanning electron microscope (1)
- Schweißnahtausbildung (1)
- Seal (1)
- Self-compacting concrete (1)
- Self-healing (1)
- Semiconductors (1)
- Sensor (1)
- Shear exfoliation (1)
- Shear strength (1)
- Sheep (1)
- Sheet resistivity (1)
- Shore-Härte (1)
- Short glass fiber (1)
- Signal amplification (1)
- Silanes (1)
- Silica nanoparticle (1)
- Silicate (1)
- Silicon nitride (1)
- Silicone rubber (SiR) (1)
- Silver (1)
- Silver diffusion (1)
- Silver nitrate (1)
- Single carbon fibers (1)
- Single particle ICP-MS (1)
- Single-shot XAFS (1)
- Sintering (1)
- Size exclusion chromatography (1)
- Sliding friction (1)
- Sliding simulation (1)
- Slip-rolling resistance (1)
- Small-angle X-ray scattering (1)
- Small-angle x-ray scattering (1)
- SnO2 (1)
- Sodium-metasilicate (1)
- Solid-state NMR (1)
- Solidification cracking (1)
- Soliton self-trapping (1)
- Solution plasma (1)
- Space charge polarisation (1)
- Spall (1)
- Spalling (1)
- Spannung-Dehnungs-Beziehung (1)
- Spannungs-Dehnungs-Kurve (1)
- Speciation (1)
- Spectroscopy (1)
- Spectrum (1)
- Split Hopkinson pressure bar (SHPB) (1)
- Stability Design (1)
- Stabilization (1)
- Stainless steel (1)
- Standardization (1)
- Strategic alliances (1)
- Stress (1)
- Stress analysis (1)
- Stress distribution (1)
- Stress-strain behavior (1)
- Stress-strain curve (1)
- Stress– strain curves (1)
- Structural characterization (1)
- Structure propertyrelationship (1)
- Structured cantilever (1)
- Structures (1)
- Sulphate-chloride attack (1)
- Super martensitic filler material (1)
- Supercapacitor (1)
- Surface Species (1)
- Surface cracks (1)
- Surface functionalization (1)
- Surface morphology (1)
- Symmetry groups (1)
- Synchrotron CT (1)
- Synchrotron imaging (1)
- Syntheseis (1)
- Synthesis (1)
- Synthetic aperture focusing technique (SAFT) (1)
- T-SEM (1)
- THz time-domain spectroscopy (THz-TDS) (1)
- TPA (1)
- TRIP - transformation induced plasticity (1)
- TXRF (1)
- TXRF-XANES (1)
- Talbot-Lau interferometry (1)
- Tandem Gas Metal Arc Welding (1)
- Tangential radiography (1)
- Temerature (1)
- Temperature (1)
- Tensile deformation (1)
- Texture (1)
- Thermal analysis (1)
- Thermal contrast (1)
- Thermal shock stress (1)
- Thermal-Expansion (1)
- Thermische Analyse (1)
- Thermo physical simulation (1)
- Thermography (1)
- Thermogravimetric analysis (TGA) (1)
- Thermomechanical Fatigue (TMF); High Cycle Fatigue (HCF); Cast iron; Fatigue assessment (1)
- Thermoplastic polyurethane (TPU) (1)
- Thick metal plate welding (1)
- Thick-walled steel (1)
- Thin films (1)
- Thin polymer films (1)
- Thrombosis (1)
- TiO2 (1)
- TiO2 films (1)
- Time resolution (1)
- Transfer film (1)
- Transformation induced plasticity (TRIP) (1)
- Tribofilm model system (1)
- Tribological properties (1)
- Tribology (1)
- Turbine (1)
- UV laser inscription (1)
- Ultra-high performance concrete (UHPC) (1)
- Ultrafast all-optical switching (1)
- Ultrafast optical techniques (1)
- Ultrafast optoacoustic (1)
- Ultrasonic echo technique (1)
- Ultrasound (1)
- Universal calibration (1)
- Validation of methods (1)
- Vehicle containers (1)
- Vertebroplasty (1)
- Viscosity (1)
- Visibility (1)
- Viskosität (1)
- Wasserhaltige Gläser (1)
- Water (1)
- Water-bearing glasses (1)
- Weathering (1)
- Weibull statistics (1)
- Weld pool support (1)
- Weld residual stress (1)
- Weld toes (1)
- Welding costs (1)
- Welding process selection (1)
- Welding residual stress (1)
- Weldments (1)
- Work hardening (1)
- Workability (1)
- X-Ray Diffraction (1)
- X-ray (1)
- X-ray computed tomography (1)
- X-ray powder diffraction (1)
- X-ray reefraction (1)
- XPS (1)
- Zeolite (1)
- Zeolites (1)
- Zinc coatings (1)
- Zinc phosphate (1)
- ZnMgAl-alloy coatings (1)
- Zugeigenschaften (1)
- active pharmaceutical ingredient (1)
- adsorption (1)
- ambient vibration tests (1)
- analysis (1)
- anodic dissolution (1)
- atomic imaging (1)
- biodiesel (1)
- biofuels (1)
- bismuth (1)
- blended cements (1)
- carbamate (1)
- carbon black (1)
- carrier system (1)
- composite materials (1)
- composites (1)
- conferences (1)
- crystal structure (1)
- cyclic shear-compression tests (1)
- degradation (1)
- dispersion-corrected density-functional theory (1)
- dynamic characterisation (1)
- editorial (1)
- electron backscattering (1)
- electron diffraction (1)
- end-of-life phase (1)
- epoxy resin (1)
- explosives (1)
- fatigue crack propagation (1)
- fatigue strength (1)
- fiber Bragg gratings (1)
- finite element modelling (1)
- fluorescence (1)
- fluorescent reporter (1)
- fracture mechanics (1)
- friction (1)
- fused silica (1)
- graphene oxide (1)
- holography (1)
- hybrid nanocomposite (1)
- hydrate (1)
- impact sensitivity (1)
- in-plane loads (1)
- laponite (1)
- laser damage (1)
- liquids material characterization (1)
- lossy materials (1)
- masonry (1)
- masonry towers (1)
- metal matrix composite (1)
- micro-structured polymer optical fibers (1)
- milling (1)
- multilayer graphene (1)
- multiphase composite (1)
- nanoclay (1)
- nanocomposites (1)
- nanocrystals (1)
- nanosecond laser (1)
- nanostructure (1)
- neutron diffraction (1)
- optical fiber (1)
- optical fiber sensors (1)
- organic dye (1)
- passive films (1)
- photoemission (1)
- photoluminescence quantum yield (1)
- photovoltaics (1)
- plasmon lifetime (1)
- plasticity (1)
- plasticization (1)
- poly (2-hydroxyethyl methacrylate) (PHEMA) (1)
- polyethylene (1)
- polymers (1)
- polymorphism (1)
- powder diffraction (1)
- proton conductors (1)
- pseudo-dynamic tests (1)
- pyrazinamide (1)
- quality control (1)
- rammed earth (1)
- recycled material (1)
- rubber (1)
- screening (1)
- seismic assessment (1)
- sensitivity analysis (1)
- shear behaviour (1)
- slip-rolling (1)
- solar cell (1)
- sorption (1)
- surface plasmon polaritons (1)
- sustainability (1)
- thermal methods (1)
- topographic effect (1)
- trade fair (1)
- tribological performance (1)
- viscoelasticity (1)
- wear (1)
- welding residual stresses (1)
- x-ray diffraction (1)
Visualization of surface modifications may be very challenging for coating/substrate systems of either almost identical optical constants, e.g. transparent films on substrates of the same material, or minor film thickness, substance quantity and affected area, e.g. ultra-thin or island films. Methods for visualization are optical microscopy (OM), imaging ellipsometry (IE), and referenced spectroscopic ellipsometry (RSE). Imaging ellipsometry operates at oblique incidence near Brewster angle of the bare, clean or unmodified substrate. In this configuration, reflected intensities are rather weak. However, the contrast to add-on and sub-off features may be superior. Referenced spectroscopic ellipsometry operates in a two-sample configuration but with much higher intensities. In many cases, both ellipsometric techniques reveal and visualize thin films, printed-pattern, laser-induced changes, and impurities better than optical microscopy. In particular for stratified homogeneous modifications, ellipsometric techniques give access to modelling and hence thickness determination. Modifications under investigation are polymer foil residue on silicon, laser-induced changes of ta-C:H coatings on 100Cr6 steel, imperfections of ta-C:H on thermal silicon oxide, degradation of glass, thin film tin oxide pattern on silicon, printed and dried pattern of liquids such as deionized water, cleaning agents, and dissolved silicone. © 2016 Elsevier B.V. All rights reserved.
In coal-fired power plants using oxyfuel combustion process with carbon capture and sequestration, instead of air, a mixture of oxygen and recirculated flue gas is injected in the boiler. A series of steels were exposed to CO2-SO2-Ar-H2O gas mixtures at 600 °C for 1000 h to compare their high temperature corrosion behavior. During the corrosion process, carburization, decarburization and recrystallization were observed underneath the oxide scale depending on the gas mixture and alloy composition. The conditions that lead to carburization are not yet completely understood, but decarburization can be simulated using thermodynamic and kinetic models. In this work, the results of these simulations are compared with measured values for one of the alloys that displayed a decarburized region. Since the mobility of carbon in the scale is not known, two strategies were adopted: simulation of alloy-atmosphere contact; and estimation of the carbon flux to produce the observed decarburization. The second approach might give an insight on how permeable to carbon the scale is.
Hydroxyapatite (HA) is a bioceramic material with excellent biological properties. However, these properties are strongly dependent of ist crystallinity degree, with high values of crystallinity associated to poor resorption rates and bioactivity. This work evaluates the properties of HA samples produced by two different free-forming conformation methods, CNC machining and 3D printing. In both cases, porous gypsum samples were produced and subsequently converted into HA in a reaction with di-ammonium hydrogen phosphate at 100°C and pH 8. A total conversion of the samples was achieved after 36 h independently of the conformation method used. The microstructure, however, before and after the conversion is showed to be dependent on the method used. After conversion the machined samples achieved a Maximum compressive strength of 3.5 MPaforporosities of circa 80%, while 3D printed samples achieved a tensile strength of 2.0 MPa by porosities of 61%.
It has been shown that selected types of substituents are able to vary the oxidative behavior of multi-walled carbon nanotubes. Such substituents investigated were sterically hindered secondary amino groups bonded in grafted piperidine units and covalently bonded bromine groups. Their interference and activity was preliminary determined in the model cumene and then in oil diesel fraction and low density polyethylene oxidation reactions. Results obtained indicate that chemical linking of amine moieties containing –NH groups directly to the carbon nanotubes core significantly increases their intrinsic anti-oxidative capacity while the grafting of Br-groups provokes the opposite functioning of the pristine samples. This inference was proved by thermogravimetric and differential thermal analysis of the polyethylene composites and experiments on profound aerobic oxidation of petroleum naphthenic fraction derived from the commercial Baku oils blend diesel cut.
Quality control requirements imposed on assays used in clinical diagnostics and point-of-care-diagnostic testing (POCT), utilizing amplification reactions performed at elevated temperatures of 35 to 95 °C are very stringent. As the temperature of a reaction vessel has a large impact on the specificity and sensitivity of the amplification reaction, simple tools for local in situ temperature sensing and monitoring are required for reaction and assay control. We describe here a platform of stem-and-loop structured DNA hairpins (molecular beacons, MBs), absorbing and emitting in the visible and red spectral region, rationally designed for precise temperature measurements in microfluidic assays for POCT, and their ap-plication for temperature measurements in a common DNA-based molecular biological assay utilizing thermophilic helicase-dependent amplification (tHDA). Spectroscopic studies of these MBs, rationally designed from DNA se-quences of different thermal stabilities, chosen not to interact with the DNA probes applied in the nucleic acid amplification assay, and temperature-dependent fluorescence measurements of MB-assay mixtures revealed the suitability of these MBs for temperature measurements directly in such an assay with a temperature resolution of about 0.5 °C without interferences from assay components. Combining two spectrally distinguishable MBs provides a broader response range and an increase in temperature sensitivity up to 0.1 °C. This approach will find future application for temperature monitoring and quality control in commercialized diagnostics assays using dried reagents and microfluidic chips as well as assays read out with tube and microplate readers and PCR detection systems for temperature measurements in the range of 35 to 95 °C.
Microstructure-property connections for porous ceramics: The possibilities offered by micromechanics
(2016)
Microstructure of porous ceramics is highly “irregular”: it comprises pores and microcracks of diverse shapes and orientations.
This makes their quantitative modeling challenging, and one
often resorts to empirical relations containing Fitting Parameters and having somewhat uncertain range of applicability. We review the substantial progress made in modeling of “irregular” microstructures that does not seem to have been sufficiently utilized in the context of ceramics. We discuss the possibilities offered by micromechanics in developing microstructure–property relations for porous microcracked ceramics. After an overview of relevant micromechanics topics, we focus on several issues of specific interest for ceramics: nonlinear stress–strain behavior, effective elastic properties, and thermally induced microcracking. We discuss extraction of microscale Parameters (such as strength of the intergranular cohesion, density of cracks and pores, etc.) from macroscopic data and identify the extent of uncertainty in this process. We also argue that there is no quantitative correlation between fracturing process and the loss of elastic stiffness.
Texture formation in amorphous Al86Ni6Y4.5La1.5Co2 splats by thermal and mechanical treatment
(2016)
The crystallization behavior of amorphous Al86Ni6Y4.5La1.5Co2 splats was analyzed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Rietveld refinement was used to analyze the preferred orientation of fcc aluminum nanocrystals in the residual amorphous matrix after annealing. Fiber textures in [200] and [220] directions were found after heating to 360 C. The influence of cold rolling on the preferred crystal orientation was studied as a function of the thickness reduction of the specimen. It was found that cold rolling significantly increases the (220) texture, while the (200) texture remains unchanged. Based on the experimental results the formation of (220) and (200) texture during the crystallization of the amorphous splats was ascribed to two different processes, internal stresses induced during splat formation or cold-rolling.
3-Aminovinylquinoxalines are readily accessible from (hetero)aryl glyoxylic acids or heterocyclic π-nucleophiles by consecutive four- and fivecomponent syntheses in the sense of an activation-alkynylation-cyclocondensation-addition sequence or glyoxylation-alkynylation-cyclocondensation-addition sequence in good yields. The title compounds are highly fluorescent with pronounced emission solvatochromicity and protochromic fluorescence quenching. Time-resolved fluorescence spectroscopy furnishes radiative and nonradiative fluorescence decay rates in various solvent polarities. The electronic structure is corroborated by DFT and TD-DFT calculations rationalizing the observed spectroscopic effects.
Designing artificial macromolecules with absolute sequence order represents a considerable challenge. Here we report an advanced light-induced avenue to monodisperse sequencedefined functional linear macromolecules up to decamers via a unique photochemical approach. The versatility of the synthetic strategy—combining sequential and modular concepts—enables the synthesis of perfect macromolecules varying in chemical constitution and topology. Specific functions are placed at arbitrary positions along the chain via the successive addition of monomer units and blocks, leading to a library of functional homopolymers, alternating copolymers and block copolymers. The in-depth characterization of each sequence-defined chain confirms the precision nature of the macromolecules. Decoding of the functional information contained in the molecular structure is achieved via tandem mass spectrometry without recourse to their synthetic history, showing that the sequence information can be read.We submit that the presented photochemical strategy is a viable and advanced concept for coding individual monomer units along a macromolecular chain.
In-line laser thermography for crack detection at elevated temperature: A Numerical modeling study
(2016)
The detection and characterization of cracks prior to damage is a technologically and economically highly significant task and is of very importance when it comes to safety-relevant structures. The evaluation of a components life is closely related to the presence of cracks in it. Laser thermography has already high capability for the detection of surface cracks and for the characterization of the geometry of artificial surface flaws in metallic samples. Crack detection in metallic samples at high temperature is highly significant in present manufacturing scenario. During the casting process of billets, surface cracks form, due to the suboptimal cooling rates. These cracks reduce value of the billet and must be removed using machining process after cooling. This secondary process increases cost of manufacturing. In this work we developed a heat transfer model for laser thermography to study the thermal contrast variation with increase in surface temperature using finite element method (FEM). Here we are mainly concentrating the capability of the scanning laser thermography in crack detection which are in elevated temperature and numerical modeling study of thermal contrast variation of crack with respect increase in metal surface temperature. This study is important to prove the capability of laser thermography for crack detection in elevated temperature. Since we are using High power CW Laser to local heating of the metal surface which can give relatively high thermal contrast even at elevated temperature compare to other heating source. Here we are modeled and simulated 2D laser scanning across a surface breaking crack and developed an algorithm to produce the vicinity of crack. The algorithm we developed applied for various surface temperature data. And validated the credibility of the algorithm with experimental data.