Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Erscheinungsjahr
- 2019 (221) (entfernen)
Dokumenttyp
Sprache
- Englisch (217)
- Deutsch (3)
- Mehrsprachig (1)
Referierte Publikation
- ja (221) (entfernen)
Schlagworte
- Quantum yield (9)
- Corrosion (7)
- Fluorescence (7)
- Lifetime (6)
- Mechanochemistry (6)
- Photoluminescence (6)
- Additive manufacturing (5)
- Cyclization (5)
- Lanthanide (5)
- Laser beam welding (5)
- MALDI-TOF MS (5)
- Nano (5)
- Nanomaterial (5)
- Photophysics (5)
- Polylactide (5)
- Broadband dielectric spectroscopy (4)
- Friction (4)
- Mechanism (4)
- Polymers (4)
- SAXS (4)
- Sensor (4)
- Wear (4)
- 3D printing (3)
- Carbon steel (3)
- Catalyst (3)
- Characterization (3)
- Crystallization (3)
- Degradation (3)
- Discotic Liquid Crystals (3)
- Energy transfer (3)
- Hydrogen (3)
- In situ (3)
- Nanocomposites (3)
- Nanoparticles (3)
- Quantum dots (3)
- Simulation (3)
- Specific heat spectroscopy (3)
- Synthesis (3)
- Upconversion nanoparticle (3)
- X-ray refraction (3)
- XPS (3)
- AIS (2)
- Adsorption (2)
- Artificial weathering (2)
- Bioactive glass (2)
- Boehmite (2)
- Computed tomography (2)
- Condensate (2)
- Crosslinking (2)
- Cytotoxicity (2)
- DLO (2)
- Digital image correlation (2)
- Dual phase steel (2)
- Dye (2)
- EOS (2)
- EPDM (2)
- Energetic Materials (2)
- Epoxy (2)
- Fatigue (2)
- Finite element method (2)
- Flame retardant (2)
- Flash DSC (2)
- Fracture mechanics (2)
- GFRP (2)
- Graphene (2)
- High power laser beam welding (2)
- High-pressure (2)
- High-strength steels (2)
- Hydrogen assisted cracking (2)
- Impurities (2)
- Indium phosphide (2)
- Interphase (2)
- KorroPad (2)
- Laser implantation (2)
- Laser-induced X-ray emission (2)
- MOF (2)
- Magnetocaloric effect (2)
- Martensite (2)
- Mechanical properties (2)
- Microstructure (2)
- Modeling (2)
- Mueller-Matrix imaging ellipsometry (2)
- Multiple cracks (2)
- NEXAFS (2)
- NIR (2)
- NMR spectroscopy (2)
- Nanocomposite (2)
- Non-metallic inclusions (2)
- Oxidation (2)
- Pitting corrosion (2)
- Polymer (2)
- Polyurethane (2)
- Pores (2)
- Probe (2)
- Radiation protection (2)
- Residual stress (2)
- Resistance spot welding (2)
- Rubber (2)
- Scanning electron microscopy (2)
- Semiconductor nanocrystal (2)
- Sensitization (2)
- Silicon (2)
- Small-angle scattering (2)
- Spectroskopic Imaging (2)
- Stainless steel (2)
- Steel (2)
- Surface chemistry (2)
- Ternary quantum dots (2)
- Thermoelectrics (2)
- TiB2 (2)
- Ultrashort laser material interaction (2)
- Upconversion nanoparticles (2)
- XRD (2)
- fluorescence (2)
- 16S rRNA gene (1)
- 1H-NMR (1)
- 2,6-diaminopyridine (1)
- 3D Druck (1)
- 60 °C-Betonversuch (1)
- AET (1)
- AIS QD (1)
- AISI 304L (1)
- AISI 321 stainless steel (1)
- AISI D2 (1)
- AKR (1)
- ASR (1)
- Abrasion (1)
- Abrasive belt (1)
- Acetone (1)
- Acoustic insulation (1)
- Acrylamide (1)
- Active Matter (1)
- Active thermography (1)
- Actuating materials (1)
- Additive Fertigung (1)
- Additive Manufacturing (1)
- Adjustment calculation (1)
- Admixture (1)
- Advanced Materials (1)
- Advanced high strength steel (1)
- Advanced high strength steels (1)
- Ageing (1)
- Ageing treatment (1)
- Aging tests (1)
- Akustischer Isolator (1)
- Alcohols (1)
- Alkoxysilanes (1)
- Alpha (1)
- Alumina (1)
- Aluminosilicate glasses (1)
- Amplicon sequencing (1)
- Analysis (1)
- Aneurism (1)
- Antibacterial (1)
- Antifriction coefficient (1)
- Antiviral activity (1)
- Architecture (1)
- Atomic force microscopy (1)
- AuNP (1)
- Auslaugung (1)
- Austenitic stainless steel (1)
- Automated expansion measurement (1)
- Automation (1)
- Automatische Dehnungsmessung (1)
- BODIPY (1)
- Bacterial adhesion (1)
- Ball milling (1)
- Baustoffe (1)
- Beta decay (1)
- Bioceramics (1)
- Biodiesel (1)
- Biofilm (1)
- Biofunctional Molecules (1)
- Biogeochemical cycling (1)
- Biomineralisation (1)
- Biopolymer (1)
- Biopolymers (1)
- Bloch wall (1)
- Boehmite nanoparticles (1)
- Boundary element method (1)
- Brachytherapy (1)
- Braking load history (1)
- Brass (1)
- Brightness (1)
- Brittle fracture (1)
- Broadband dielectric microscopy (1)
- Bubble formation (1)
- Building Materials (1)
- Bulging effect (1)
- Bulk temperature (1)
- C-C coupling (1)
- C. lap-shear (1)
- CAFTP (1)
- CCUS (1)
- CFRP (1)
- CMAS (1)
- CO2 separation membranes (1)
- COK-12 (1)
- Calcination (1)
- Calcium cobaltite (1)
- Cancer treatment (1)
- Carbide (1)
- Carbon capture (1)
- Carbon capture, utilization and storage technology (1)
- Carbon dioxide (1)
- Carrier gas hot extraction (1)
- Catalysts (1)
- Catch and release assay (1)
- Catechol (1)
- Cationic photocuring (1)
- Cavitation (1)
- Cell (1)
- Cell size (1)
- Cellulose (1)
- Cement admixtures (1)
- Cement hydration (1)
- Central Taurus (1)
- Ceramic (1)
- Ceramics (1)
- Chaboche model (1)
- Characterisation (1)
- Chemical durability (1)
- Chunky graphite (1)
- Circumferential weld (1)
- Classification (1)
- Cleavable linker (1)
- Co (1)
- Co-crystal (1)
- CoO (1)
- Coarse-grained heat-affected zone (1)
- Cob (1)
- Cobalt (1)
- Cobalt and zinc oxides (1)
- Cocrystal (1)
- Coefficient of thermal expansion (1)
- Coherent exchange (1)
- Colored glasses (1)
- Combinatorial chemistry (1)
- Combinatorial polymer libraries (1)
- Community composition (1)
- Composites (1)
- Compression behavior (1)
- Compression test (1)
- Concrete Prism Test at 60 °C (1)
- Conjugates (1)
- Contact angle (1)
- Contact fatigue (1)
- Copper (1)
- Copper-based wood preservatives (1)
- Coputed tomography (1)
- Core/shell quantum dot (1)
- Corrosion monitoring (1)
- Corrosion pits (1)
- Corrosion testing (1)
- Crack (1)
- Crack arrest (1)
- Crack propagation (1)
- Cracking (1)
- Cristobalite frameworks (1)
- Critical pitting temperature (1)
- Critical strain (1)
- Crosslinking density (1)
- Crystal Texture (1)
- Crystalline cones (1)
- Curie temperature (1)
- Cyclic (1)
- Cyclic softening (1)
- Cycloaliphatic epoxy oligosiloxane (1)
- D. aging (1)
- D. creep D. viscoelasticity (1)
- DFG SPP 2005 (1)
- DIN EN 16516 (1)
- DMA (1)
- DNA (1)
- DNA damage (1)
- DPA (1)
- Damage (1)
- Damage detection and localisation (1)
- Damping factor (1)
- Data Processing (1)
- Dead Sea Scrolls (1)
- Dealloying (1)
- Defect photoluminescence (1)
- Defects (1)
- Density Functional Theory (1)
- Deposition welding (1)
- Deuterium (1)
- Dielectric breakdown (1)
- Dielectric spectroscopy (1)
- Diesel (1)
- Diesel Fuel (1)
- Diffraction (1)
- Digital Volume Correlation (1)
- Dipole moment (1)
- Direct energy deposition (1)
- Dissimilar metal weld overlays (1)
- Distributed fiber optic sensing (1)
- Domain wall (1)
- Dosimetry (1)
- Double complex salts (1)
- Drinking water (1)
- Drug (1)
- Dual Energy Imaging (1)
- Dual sensing (1)
- Ductile iron (1)
- Durability testing (1)
- Dye degradation (1)
- Dynamic heterogeneity (1)
- EBSD (1)
- ESI MS (1)
- Early oxidation (1)
- Early sulfidation (1)
- Editorial (1)
- Editorial Board (1)
- Elastic constants (1)
- Elastin (1)
- Electrical conductivity (1)
- Electro-fused zirconia (1)
- Electro-thermomechnical model (1)
- Electrochemical characterisation (1)
- Electrochemical deposition (ECD) (1)
- Electrochemical potentiodynamic reactivation (1)
- Electrochemical sensing (1)
- Electrode geometry (1)
- Electromagnetic stirring (1)
- Electron energy (1)
- Electron microscopy (1)
- Element transport (1)
- Elemental composition (1)
- Elevated temperatures (1)
- Ellipsometry (1)
- Emissionsprüfung (1)
- Enamels (1)
- End crater (1)
- Energy deposit (1)
- Energy distribution (1)
- Engine oil design (1)
- Engine oil testing (1)
- Environment (1)
- Environmentally assisted cracking (1)
- Epoxy conversion degree (1)
- Europium (1)
- Evolution of bulk properties (1)
- Exchange interaction (1)
- Exchange length (1)
- Excitation power density (1)
- Experimental design (1)
- Explosion limits (1)
- Explosion protection (1)
- Explosive spalling (1)
- Exposed metal sites (1)
- Extracellular matrix (1)
- FLIM (1)
- FRET (1)
- FSDC (1)
- FT-IR (1)
- Fabrication (1)
- Facilitated activation (1)
- Fast scanning calormetry (1)
- Fatigue Testing (1)
- Fatigue crack propagation (1)
- Fatigue crack propagation stages (1)
- Fatigue strength (1)
- Fatigue strength and life (1)
- Fe (1)
- Fe2TiO5 (1)
- Femtosecond laser (1)
- Ferritic spheroidal graphite cast iron (1)
- Ferritic steels (1)
- Ferritic–martensitic steel (1)
- Ferromagnetism (1)
- Ferumoxytol (1)
- Fiber Bragg grating (FBG) (1)
- Finite element analysis (1)
- Finite-element method (1)
- Fire (1)
- Flammable Gas (1)
- Flammable Liquid (1)
- Flow Chemistry (1)
- Fluid-flow (1)
- Fluorescent label (1)
- Formaldehyd (1)
- Formation (1)
- Four-point bending test (1)
- Freeze casting (1)
- Friction Stir Welding (1)
- Frozen state photopolymerization (1)
- Full penetration (1)
- Fully aromatic frameworks (1)
- Functionalized nanographene (1)
- Funtional Groups (1)
- Fusion zone (1)
- GMA welding (1)
- GMAW (1)
- GTN model (1)
- Gadolinium (1)
- Gamma (1)
- Gas permeability (1)
- Gas separation membranes (1)
- Geant4 (1)
- Geant4-DNA (1)
- Gel-type electrolytes (1)
- Gelartige Elektolyte (1)
- Geology (1)
- Geothermal energy (1)
- Glass (1)
- Glass-ceramic (1)
- Glucose (1)
- Gold (1)
- Gold Nanoparticles (1)
- Gold nanoclusters (1)
- Grain boundary (1)
- Grain size (1)
- Grain structure (1)
- Graphene Oxide (1)
- Graphite modules (1)
- Grating (1)
- Grinding (1)
- HNBR (1)
- Halophile (1)
- Hardmetal (1)
- Heat conduction (1)
- Heat control (1)
- Heat treatment (1)
- Heated concrete (1)
- Heavy metal free (1)
- Hierarchical porosities (1)
- High pressure (1)
- High specific surface area (1)
- High temperature corrosion (1)
- High-entropy alloys (1)
- High-performance concrete (1)
- High-temperature oxidation (1)
- High-voltage testing (1)
- Highspeed-plasma-laser-cladding (1)
- Hot crack (1)
- Hot cracking (1)
- Hot steam (1)
- Hot-Stamping (1)
- Hybrid laser-arc welding (1)
- Hydration (1)
- Hydrogel (1)
- Hydrogen assisted stress corrosion cracking (1)
- Hydrogen dependent mechanical properties (1)
- Hydrogen diffusivity (1)
- Hydrogen-containing hot gas (1)
- Hydrophobin (1)
- Hygrothermal (1)
- Hyperbranched (1)
- Hysteresis measurement (1)
- ITS region (1)
- Impact behaviour (1)
- Impact damage (1)
- Impurity segregation (1)
- In-Situ X-ray CT (1)
- In-situ Process Monitoring (1)
- Inclusion cluster (1)
- Inclusion size (1)
- Inconel 625 (1)
- Inconel 718 (1)
- Incremental lifetime models (1)
- Indenter modulus (1)
- Inflammation (1)
- Infrared nano AFM (1)
- Infrared spectroscopy (1)
- Initial crack size (1)
- Inline NMR Spectroscopy (1)
- Innenraumluft (1)
- Integrated Processes (1)
- Intergranular cracking (1)
- Intermodulation (1)
- Intermodulation AFM (1)
- Intermodulation-AFM (1)
- Internal Surfaces (1)
- Internal oxidation (1)
- Ionic porosity (1)
- Iron (1)
- Iron meteorite (1)
- Iron oxide (1)
- Irradiation (1)
- Journal (1)
- Kikuchi pattern (1)
- Kinetics (1)
- Korrosionsprüfung (1)
- LEE (1)
- LL equation (1)
- LLG (1)
- LME (1)
- La(Fe,Si)13 phase (1)
- Lactide (1)
- Laminates (1)
- Landau Lifshitz Gilbert equation (1)
- Landau Lifshitz equation (1)
- Large-pore (1)
- Laser Metal Deposition (1)
- Laser Powder Bed Fusion (1)
- Laser Pulver Auftragsschweißen (1)
- Laser beam melting (1)
- Laser dispersing (1)
- Laser welding (1)
- Laser-induced nanostructures (1)
- Laser-induced periodic surface structures (LIPSS) (1)
- Laser-modified surface (1)
- Leaching of alkalis (1)
- Lead isotope composition (1)
- Lead-free (1)
- Leak-tightness (1)
- Lean duplex (1)
- Legionella (1)
- Liquid crystals (1)
- Liquid metal embrittlement (1)
- Localised corrosion (1)
- Long-term storage (1)
- Low Reynolds number swimmers (1)
- Low cycle fatigue (1)
- Low heat input GMA welding (1)
- Low melting glasses (1)
- Luminescence (1)
- MALDI TOF MS (1)
- MALDI-TOF (1)
- MCS (1)
- MHD (1)
- MOF-74 (1)
- Macrophage (1)
- Magmatic and hydrothermal processes (1)
- Magnet coupling (1)
- Magnetic (1)
- Magnetic Nanoparticles (1)
- Magnetic anisotropy (1)
- Magnetic interacion (1)
- Magnetic moment (1)
- Magnetic resonance imaging (1)
- Magnetization dynamics (1)
- Magnetohydrodynamics (1)
- Mass spectrometry (1)
- Mass transport (1)
- Material defects (1)
- Material degradation (1)
- Mechanical property (1)
- Melt-extraction technique (1)
- Melting (1)
- Mesoporous Silica (1)
- Metal carbides (1)
- Metal phosphonates (1)
- Metal–organic frameworks (1)
- Methanogen (1)
- Method (1)
- Metrology (1)
- Micro-shrinkages (1)
- Microcracking (1)
- Microdosimetry (1)
- Microencapsulation (1)
- Microhardness (1)
- Micromagnetism (1)
- Microplastics (1)
- Microwave synthesis (1)
- Mis-match (1)
- Mixed Ca-K-Na phosphates (1)
- Mixed-linkers (1)
- Modelling (1)
- Modular Production (1)
- Moisture (1)
- Molecular masses (1)
- Molecular mobility (1)
- Monte-Carlo simulation (1)
- Multivariate data analysis (1)
- NBR (1)
- NDT (1)
- NIR dyes (1)
- NMR (1)
- NP (1)
- Na and K rhenanites (1)
- Nanocasting (1)
- Nanoconfinement (1)
- Nanohybrid (1)
- Nanoindentation (1)
- Nanomechanical properties (1)
- Nanomechanics (1)
- Nanoparticle (1)
- Nanoparticle characterization (1)
- Nanoporous (1)
- Nanosecond laser (1)
- Nanosecond laser irradiation (1)
- Natural (1)
- Nd excitation (1)
- Neel wall (1)
- Neutron diffraction (1)
- Neutron imaging (1)
- Ni (1)
- NiCrBSi (1)
- Nickel (1)
- Nickel alloys (1)
- Niobium alloying (1)
- Nitrene[2+1]cycloaddition (1)
- Nitride (1)
- Nitrides (1)
- Non-destructive Materials (1)
- Nonclassical crystallization (1)
- Nosema ceranae (1)
- Numerical analysis (1)
- Numerical simulation (1)
- OH radicals (1)
- OOMMF (1)
- Object oriented micromagnetic framework (1)
- Oil and gas industry (1)
- Optical fibers (1)
- Optical measurment technique (1)
- Optical near field (1)
- Ordered mesoporous silica (1)
- Ore provenance (1)
- Organic–inorganic nanostructures (1)
- Orientation relationship (1)
- Oscillating magnetic field (1)
- Osmia bicornis (1)
- Oxidation protection (1)
- Oxocobaltates (1)
- Oxygen Evolution Catalyst (1)
- Oxygen evolution reaction (OER) (1)
- Oxygen permability (1)
- Oxygen sensitive (1)
- P92 (1)
- PDT (1)
- PE-HD Sorption (1)
- PEAK (1)
- PEG (1)
- Parabolic flight (1)
- Paramagnetism (1)
- Particle accretion (1)
- Pathogen spillover (1)
- Pentaerythritol (1)
- Performance assessment (1)
- Peritectic reaction (1)
- Permeability (1)
- Perovskite (1)
- Phase diagram (1)
- Phase mask (1)
- Phase transformations (1)
- Phase transition (1)
- Phase-field (1)
- Phononic crystal (1)
- Phononischer Kristall (1)
- Phosphate (1)
- Phosphinine (1)
- Photocatalyst (1)
- Photogrammetry (1)
- Photoluminescence quantum yield (1)
- Photon Counting Detectors (1)
- Photooxidation (1)
- Photostability (1)
- Plasmon resonance (1)
- Plasmonic nanofocusing spectroscopy (1)
- Plastic deformation (1)
- Platinum-group-metals (1)
- Polarisation (1)
- Polarization spectroscopy (1)
- Poly(N-vinylpyrrolidone) (1)
- Poly(vinyl chloride) (1)
- Polyamide 12 (1)
- Polyaniline (1)
- Polycarbonate (1)
- Polyethylene (1)
- Polyethylene glycol (1)
- Polymer Testing (1)
- Polymer blends (1)
- Polymer particle (1)
- Polymer-based nanocomposites (1)
- Polymers of intrinsic microporosity (1)
- Polyphosphoester (1)
- Pore size tailoring (1)
- Pore solution (1)
- Porosity (1)
- Porphyrin (1)
- Portland cement (1)
- Post-modification by L-cysteine (1)
- Potentiometry (1)
- Preceramic polymer (1)
- Precipitation hardening (1)
- Precision polymer sequencing (1)
- Prediction (1)
- Pressure-assisted sintering (1)
- Prevention (1)
- Priam's treasure (1)
- Process Analytical Technology (1)
- Process development (1)
- Process parameters (1)
- Process simulation (1)
- Processing window (1)
- Properties (1)
- Pseudo peptides (1)
- Pulsed thermography (1)
- Pultruded fiber rods (1)
- Quality assurance (1)
- Quantitative Analysis (1)
- Quinones (1)
- ROPPOC (1)
- RSW (1)
- Radiation damage (1)
- Radiationtherapy (1)
- Radioactive decay (1)
- Raman spectroscopy (1)
- Reaction Monitoring (1)
- Real-time infrared spectroscopy (1)
- Relaxation fatigue (1)
- Residual stressMultiphase compositesInteractionMicromechanical schemesAnisotropy (1)
- Residual stresses (1)
- Resonance testing (1)
- Restraint (1)
- Reverse microemulsion (1)
- Rh-Ir alloys (1)
- Rheology (1)
- Ring-expansion polymerization (1)
- Ring-opening polymerization (1)
- Rod structure (1)
- Rosin (1)
- SDC (1)
- SEM (1)
- STEM (1)
- SWIR photoluminescence (1)
- Safety (1)
- Safety characteristics (1)
- Salicylate (1)
- Samarium doped ceria (1)
- Scaffolds (1)
- Scanning electrochemical microscope (SECM) (1)
- Scanning transmission electron microscopy (1)
- Scattering (1)
- Scavenging effect of iron (1)
- Scratches (1)
- Seal failure (1)
- Selective Laser Melting (1)
- Selective laser melting (1)
- Self-assembly (1)
- Self-lubricating coating (1)
- Semi-metallic sintered material (1)
- Sensitisation (1)
- Sequence-defined oligomer (1)
- Sequencing (1)
- Shale (1)
- Shape (1)
- Shear behavior (1)
- Short-distance diffusion (1)
- Shrinkages (1)
- Silica coating (1)
- Silicoborate glasses (1)
- Silver indium sulfide (1)
- Single molecule (1)
- Single particle spectroscopy (1)
- Single-dot spectroscopy (1)
- Single-source precursors (1)
- Singlet oxygen (1)
- Sintering (1)
- Size (1)
- Small angle neutron scattering (1)
- Small angle scattering (1)
- Soda-lime-silica (1)
- Soda-lime-silica glass (1)
- Sodium ion batteries (1)
- Soil incubation study (1)
- Sol-gel coating (1)
- Solidification (1)
- Solubilizer (1)
- Sonochemical synthesis (1)
- Sorption (1)
- Spar cap design (1)
- Spark plasma sintering (1)
- Spectral irradiation (1)
- Spectral sensitivity (1)
- Spectroscopy (1)
- Spin (1)
- Spontaneous emulsification (1)
- Stabstruktur (1)
- Standardisation (1)
- Static Mixing (1)
- Statistics (1)
- Stepwise growth (1)
- Stereocomplex (1)
- Stimuli-responsive polymers (1)
- Stochastic Landau Lifshitz Gilbert equation (1)
- Stochastic Landau Lifshitz equation (1)
- Stress intensity factor (1)
- Stress-strain behavior (1)
- Structural analysis (1)
- Structural anomalies (1)
- Structural defects (1)
- Structural health monitoring (1)
- Structural inhomogenities (1)
- Structural sealant glazing (1)
- Structures under extreme conditions (1)
- Struvite (1)
- Sub-oxide (1)
- Subcritical crack growth (1)
- Substitution (1)
- Sulfidation (1)
- Superconducting magnet (1)
- Superimposed loading (1)
- Superparamagnetism (1)
- Surface (1)
- Surface Chemistry (1)
- Surface group quantification (1)
- Surface modification (1)
- Surface roughness (1)
- Surface texturing (1)
- Survival rates (1)
- Suzuki-Miyaura coupling (1)
- Swarming (1)
- Swept wavelength interferometry (1)
- Switch (1)
- Synchrotron X-ray diffraction (1)
- Synchrotron X‐ray refraction radiography (1)
- Synchrotron x-ray refraction radiography (SXRR) (1)
- Temeprature scaling (1)
- Temperature (1)
- Temperature dependency (1)
- Temperature effects (1)
- Temperature modulated differential scanning calorimetry (1)
- Temple Scroll (1)
- Testing method (1)
- Thermal analysis (1)
- Thermal barrier coatings (1)
- Thermal conductivity device (1)
- Thermal degradation (1)
- Thermal expansion (1)
- Thermal extraction-desorption gas chromatography mass spectrometry (1)
- Thermally-induced moisture transport (1)
- Thermo-fluid dynamics (1)
- Thermo-fluid flow (1)
- Thermo-responsive polymers (1)
- Thermoelectric properties (1)
- Thermografie (1)
- Thermography (1)
- Thermoplastics (1)
- Thick materials (1)
- Thick shells (1)
- Thin film systems (1)
- Thin films (1)
- Thin magnetic films (1)
- Thin polymer films (1)
- Thiol-ene click chemistry (1)
- Ti-6Al-4V (1)
- Time-gated emission (1)
- Tin(II)octanoate (1)
- ToF-SIMS (1)
- Topotactic phase transitions (1)
- Toxicity (1)
- Transformation pathways (1)
- Tribofilm (1)
- Triplet-triplet annihilation (1)
- Trojan silver artefacts (1)
- Tungsten carbide (1)
- Tungsten-Rhenium (1)
- Two-dimensional hexagonal boron nitride(h-BN) (1)
- UCST polymers (1)
- UHMWPE (1)
- UV Vis (1)
- UV degradation (1)
- UV/VIS spectroscopy (1)
- Ultra-high strength steel (1)
- Ultraschallmessung (1)
- Ultrashort laser pulses (1)
- Ultrasonic measurement (1)
- Uniaxial compression tests (1)
- Upconversion (1)
- Upconverstion (1)
- Utilization, and storage (CCUS) technology (1)
- Vacuum (1)
- Vickers indentation (1)
- Viscoelastic model (1)
- Viscoplastic (1)
- Viscous sintering (1)
- WAXS (1)
- Wastewater (1)
- Water content (1)
- Water migration (1)
- Water speciation (1)
- Wear resistance (1)
- Weathering (1)
- Weld pool behavior (1)
- Welding process simulation (1)
- Wetting (1)
- Wild bees (1)
- Wind rotor blade (1)
- X-ray (1)
- X-ray Absorption Spectroscopy (1)
- X-ray Photoelectron Spectroscopy (XPS) (1)
- X-ray absorption spectroscopy (1)
- X-ray and electron diffraction (1)
- X-ray diffraction (1)
- X-ray microspectroscopy (1)
- X-ray-CT (1)
- X38CrMoV5-3 (1)
- XAFS (1)
- Yb(III) complex (1)
- Year in Review (1)
- Young´s modulus (1)
- Zeolitic Imidazolate Frameworks (1)
- Zinc coated steel (1)
- Zinc coatings (1)
- Zinc oxide (1)
- Zinkdeckschichten (1)
- Zirconia (1)
- ZnO (1)
- anion-exchange (1)
- antibody (1)
- arbidic austempered ductile iron (1)
- bacteria (1)
- bacteria detection (1)
- beta particle (1)
- clustered nanoparticles (1)
- digital image correlation (1)
- dual phase steel (1)
- flow cytometry (1)
- fluorescence microscopy (1)
- gamma ray (1)
- high pressure (1)
- immunoseparation (1)
- infrared spectroscopy (1)
- lifetime (1)
- low energy electrons (1)
- magnetic nanoparticle (1)
- method (1)
- nanoparticle (1)
- pH (1)
- particle (1)
- particle scattering (1)
- phosphate glasses (1)
- quantum dot (1)
- quantum yield (1)
- radiolysis (1)
- resistance spot welding (1)
- screening tes (1)
- temeprature dependent exchange length (1)
- water speciation (1)
- µ-gravity (1)
Organisationseinheit der BAM
- 6 Materialchemie (71)
- 5 Werkstofftechnik (44)
- 9 Komponentensicherheit (40)
- 1 Analytische Chemie; Referenzmaterialien (35)
- 8 Zerstörungsfreie Prüfung (30)
- 6.3 Strukturanalytik (28)
- 7 Bauwerkssicherheit (25)
- 1.2 Biophotonik (24)
- 6.6 Physik und chemische Analytik der Polymere (21)
- 9.3 Schweißtechnische Fertigungsverfahren (19)
Automotive engine lubricants
(2019)
In 2003, ASTM Manual 37, Fuels and Lubricants Handbook: Technology, Properties, Performance and Testing, featured a chapter discussing automotive lubricants, including engine oils, automatic transmission fluids, manual transmission fluids, gear lubricants, and greases. This chapter, by Schwartz, Tung, and McMillan, surveyed all of these classes of lubricants, up to its publication in 2003.
More recently, the period between 2003 and 2010 has been addressed as part of a book copublished by ASTM and SAE International (coeditors Simon Tung and George Totten), where Fox surveyed the development of engine oil specifications that emerged during those years.
This chapter surveys the evolution of engine oil design and testing since 2002 and concludes with insights into future directions offered by recent tribological research. Our objective is to provide a reader new to the field with an understanding of the following:
- Engine oil composition and formulation
- North American engine oil specification development, and an outline of emergent European specifications
- How emergent specifications and legislative requirements are linked to the introduction of new engine hardware
- How tribological innovation can contribute to future enhancements in engine efficiency
In parallel, we will provide several tables comparing groups of contemporaneous specifications.
Carbidic Austempered Ductile Iron (CADI) microstructures containing eutectic carbides can be produced by the addition of carbide stabilizing elements, such as chromium. Carbides formed from the addition of Cr are eutectic of M3C type. The presence of such hard phases can enhance the abrasion wear resistance of ductile iron. A new CADI can be produced by the addition of Nb. Niobium carbide particles are formed in the beginning of solidification and remain stable once they are insoluble in solid iron matrix. The dry sand abrasive wear resistance of ductile irons alloyed with 1.0, 1.8, and 2.4 wt% Nb were tested in both “as-cast” and “heat treated” conditions using standard ASTM G65. Results were compared to abrasive wear data obtained on ductile iron alloyed with 1 wt% Cr, CADI (1 wt% Cr), and the basic composition of iron without carbide stabilizing elements. In the “ascast” condition, the addition of Nb did not lead to a reduction in wear, while CADI with Nb is a promising substitute for CADI with Cr addition, because both materials showed very similar values of abrasion resistance.
Micro-ploughing and micro-cutting mechanisms were observed on the worn surfaces of ductile irons. Abrasive wear resistance of these alloys was correlated with the volume fraction of carbides.
Eu2+ is used to replace toxic Pb2+ in metal halide perovskite nanocrystals (NCs). The synthesis implies injection of cesium oleate into a solution of europium (II) bromide at an experimentally determined optimum temperature of 130 ○C and a reaction time of 60 s. Structural analysis indicates the formation of spherical CsEuBr3 nanoparticles with a mean size of 43 ± 7 nm. Using EuI2 instead of EuBr2 leads to the formation of 18-nm CsI nanoparticles, while EuCl2 does not show any reaction with cesium oleate forming 80-nm EuCl2 nanoparticles.
The obtained CsEuBr3 NCs exhibit bright blue emission at 413 nm (FWHM 30 nm) with a room temperature photoluminescence quantum yield of 39%. The emission originates from the Laporte-allowed 4f7–4f65d1 transition of Eu2+ and shows a PL decay time of 263 ns.
The long-term stability of the optical properties is observed, making inorganic lead-free CsEuBr3 NCs promising deep blue emitters for optoelectronics.
Singlet oxygen can severely damage biological tissue, which is exploited in photodynamic therapy (PDT). In PDT, the effective range is limited by the distribution of the photosensitizer (PS) and the illuminated area. However, no distinction is made between healthy and pathological tissue, which can cause undesired damage. This encouraged us to exploit the more acidic pH of cancerous tissue and design pH-controllable singlet oxygen-generating boron-dipyrromethene (BODIPY) dyes. A pH sensitivity of the dyes is achieved by the introduction of an electronically decoupled, photoinduced electron transfer (PET)-capable subunit in meso-position of the BODIPY core. To favor triplet-state formation as required for singlet Oxygen generation, iodine substituents were introduced at the chromophore core. The resulting pH-controlled singlet oxygen-generating dyes with pKa values in the physiological range were subsequently assessed regarding their potential as pH-controlled PS for PDT.
Using HeLa cells, we could successfully demonstrate markedly different pH-dependent cytotoxicities upon illumination.
The hydration process of Portland cement in a cementitious system is crucial for development of the high-quality cementbased construction material. Complementary experiments of Xray diffraction analysis (XRD), scanning electron microscopy (SEM) and time-resolved laser fluorescence spectroscopy (TRLFS) using europium (Eu(III)) as an optical probe are used to analyse the hydration process of two cement systems in the absence and presence of different organic admixtures.
We Show that different analysed admixtures and the used sulphate carriers in each cement system have a significant influence on the hydration process, namely on the time-dependence in the formation of different hydrate phases of cement. Moreover, the effect of a particular admixture is related to the type of sulphate carrier used.
The quantitative information on the amounts of the crystalline cement paste components is accessible via XRD analysis. Distinctly different morphologies of ettringite and calcium-silicate-hydrates (C-S-H) determined by SEM allow visual conclusions about formation of these phases at particular ageing times. The TRLFS data provides information about the admixture influence on the course of the silicate reaction. The dip in the dependence of the luminescence decay times on the hydration time indicates the change in the structure of C-S-H in the early hydration period. Complementary information from XRD, SEM and TRLFS provides detailed information on distinct periods of the cement hydration process.
Due to the stochastic nature of crack nucleation by Vickers indentation, a statistical analysis of propagation rates of 185 radial cracks was performed. Crack growth was observed directly using a video camera with high Image acquisition rate. It is found that propagation rates are controlled by the environmental reactions at the crack-tip shortly after their initiation (< 1 s). Calibration of the stress intensity KI showed that the residual stress factor χ and the exponent n of the equation KI==χPc−n (with P==load and c==crack length) are broadly distributed among the 185 analyzed cracks, ranging from 10−16 to 104 and from 0.1 to 5, respectively. For the most frequent crack, the equation KI==0.052Pc−1.47 holds. The results show that correlations of indentation-induced crack length to stress intensity necessitate the use of statistical significant data that are calibrated by the environmental reactions at the crack-tip.
Hydrogen gas diffusivity of fourteen glasses of the Na2O-Al2O3-SiO2 system are studied along the joins quartzalbite-jadeite-nepheline (Qz-Ab-Jd-Np, fully polymerized) and albite-sodium disilicate (Ab-Ds, depolymerized).
Density measurements show that ionic porosity decreases from 54.4% (Qz) to 51.5% (Np) and from 52.4% (Ab) to 50.2% (Ds). Hydrogen diffusivity D follows similar trends but at another scale. D at 523 K decreases from 4×10−12 to 3×10−14m2 s−1 (Qz-Np) and from 4×10−13 to 3×10−15m2 s−1 (Ab-Ds). Charge compensating Na+ acting as a filling agent in fully polymerized network structures leads to up to one order of Magnitude higher diffusivities as depolymerized glass structures of the same SiO2 content where Na+ takes the role of a
modifier ion. Temperature dependence of the diffusivity indicates that both the activation energy involved with the moving H2 molecule as well as the accessible volume in the structure contribute to this compositional trend.
Roaldite – Fe4N – has been identified in the São Julião de Moreira iron meteorite using electron backscatter diffraction (EBSD) and simultaneously acquired energy-dispersive x-ray spectroscopy (EDS). Mean-periodic-number images derived from raw EBSD patterns confirm this phase by an even higher spatial resolution compared to EDS.
Roaldite appears in the form of systematically and repetitively aligned plates. Despite the locally heavy plastic deformation, it is shown that the origin of the oriented precipitation of roaldite is linked to the orientation of the kamacite matrix. Roaldite can be considered to be precipitated from kamacite using an inverse Kurdjumov-Sachs (K-S) or Nishiyama-Wassermann (N-W) orientation relationship. A more accurate discrimination is impossible due to the accumulated shock deformation, which blurs the local reference orientation of kamacite. The habit plane of roaldite is found to be {112}R, which is most likely parallel to {120}K of kamacite. Some of the roaldite plates contain two orientation variants which repeatedly alternate. Their misorientation angle is about 12°.
A concept for the growth of silica shells with a thickness of 5–250 nm onto oleate-coated NaYF4:Yb3+/Er3+ upconversion nanoparticles (UCNP) is presented. The concept enables the precise adjustment of shell thicknesses for the preparation of thick-shelled nanoparticles for applications in plasmonics and sensing. First, an initial 5–11 nm thick shell is grown onto the UCNPs in a reverse microemulsion. This is followed by a stepwise growth of these particles without a purification step, where in each step equal volumes of tetraethyl orthosilicate and ammonia water are added, while the volumes of cyclohexane and the surfactant Igepal® CO-520 are increased so that the ammonia water and surfactant concentrations remain constant. Hence, the number of micelles stays constant, and their size is increased to accommodate the growing core–shell particles. Consequently, the formation of core-free silica particles is suppressed. When the negative zeta potential of the particles, which continuously decreased during the stepwise growth, falls below −40 mV, the particles can be dispersed in an ammoniacal ethanol solution and grown further by the continuous addition of tetraethyl orthosilicate to a diameter larger than 500 nm. Due to the high colloidal stability, a coalescence of the particles can be suppressed, and single-core particles are obtained. This strategy can be easily transferred to other nanomaterials for the design of plasmonic nanoconstructs and sensor systems.
The present work deals with the development of a strategy for the prevention of end crater defects in high-power laser welding of thick-walled circumferential welds. A series of experiments were performed to understand the influence of the welding Parameters on the formation of end crater defects such as pores, cracks, root excess weld metal and shrinkage cavities in the overlap area. An abrupt switch-off of the laser power while closing the circumferential weld leads to a formation of a hole which passes through the whole welded material thickness. A laser power ramp-down causes solidification cracks which are initiated on the transition from full-penetration mode to partial penetration. Defocusing the laser beam led to promising results in terms of avoiding end crater defects. Cracks and pores in the overlap area could be effectively avoided by using defocusing techniques.
A strategy for avoiding of end crater imperfections was tested on flat specimens of steel grade S355J2 with a wall thickness of between 8 mm and 10 mm and then transferred on the 10 mm thick pipe sections made of high-strength pipeline steel API5L-X100Q.