5 Werkstofftechnik
Filtern
Erscheinungsjahr
- 2018 (73) (entfernen)
Dokumenttyp
- Zeitschriftenartikel (73) (entfernen)
Schlagworte
- Residual stress (6)
- Additive manufacturing (4)
- 3D-Printing (3)
- Creep (3)
- EBSD (3)
- High temperature corrosion (3)
- Microstructure (3)
- Additive Manufacturing (2)
- Aging (2)
- Bacteria (2)
- Calcination (2)
- Damage (2)
- Degradation (2)
- Glass (2)
- IN718 (2)
- Laser ablation in liquid (2)
- Nanoparticles (2)
- Neutron diffraction (2)
- Particle morphology (2)
- Plastic deformation (2)
- Reaction-sintering (2)
- Selective laser melting (2)
- Steel (2)
- TEM (2)
- Titanium oxide (2)
- 3D printing (1)
- 3D-finite element modeling (1)
- Accelerated temporal integration (1)
- Advanced wastewater treatment (1)
- Ageing (1)
- Al-Cu-Li-alloy (1)
- Alloys (1)
- Alterung (1)
- Alumina coatings (1)
- Aluminium alloys (1)
- Aluminiumlegierung (1)
- Aluminum alloy (1)
- Aluminum alloys (1)
- Amorphization (1)
- Amorphous silica (1)
- Annealing (1)
- Aquifer (1)
- BTEX (1)
- Biaxial strength (1)
- Bimodal distribution (1)
- Binder jetting (1)
- Bio Ceramic (1)
- Biogeochemistry (1)
- Bitter technique (1)
- Bone regeneration (1)
- Borosilicate glass (1)
- Bravais lattice (1)
- Brown-rot fungi (1)
- CCS (1)
- CCUS, supercritical/dense phase CO2, carbon steels, martensitic steel, superaustenite steel, droplet corrosion (1)
- Calcium Cobaltite (1)
- Calcium cobaltite (1)
- Carbon steel (1)
- Carbon storage (1)
- Ccs (1)
- Ceramic (1)
- Chemometrics (1)
- Co2-Storage (1)
- Coating (1)
- Cobald based alloy (1)
- Coniophora puteana (1)
- Coordinate measurement machine (1)
- Corrosion (1)
- Corrosion Fatigue (1)
- CrN/NbN (1)
- Crack healing (1)
- Crack propagation (1)
- Creep mechanisms (1)
- Critical energy release rate (1)
- Crystallographic texture (1)
- Cupriavidus metallidurans (1)
- Deformation (1)
- Dentine (1)
- Destabilization (1)
- Diffraction contrast (1)
- Diffusion (1)
- Digital image correlation (1)
- Dislocation (1)
- Dynamic recrystallization (1)
- EFTEM (1)
- Early stages (1)
- Efficiency (1)
- Electric conductivity (1)
- Electrical resistance (1)
- Electron back-scattered diffraction (1)
- Electron microscopy (1)
- Enamel (1)
- End of life (1)
- Environmental stress cracking (ESC) (1)
- Environmentally assisted cracking (1)
- Epoxy resin (1)
- Expanding cavity model (1)
- FIB Tomography (1)
- Failure rate (1)
- Femtosecond laser (1)
- Fiber-matrix interface (1)
- Filters (1)
- Finland (1)
- Fluoride nanoparticles (1)
- Fluorolytic sol−gel (1)
- Fourier series (1)
- Fourier transform infrared spectroscopy (1)
- Fracture mechanics (1)
- Friction (1)
- Friction stir processing (1)
- Full notch creep test (FNCT) (1)
- Fungi (1)
- GMR (1)
- GMR sensors (1)
- Geometrical factors (1)
- Glass capillaries (1)
- Glass crystallization stress (1)
- Glass transition (1)
- Glass-ceramics definition (1)
- Gold (1)
- Grade S960QL steel (1)
- Gradient-enhanced fatigue model (1)
- Grain Boundary Corrosion (1)
- Graphite (1)
- Heat treatment (1)
- High Cycle Fatigue (1)
- High interstitial austenitic steel (1)
- High-temperature corrosion (1)
- Hipims (1)
- Hot isostatic pressing (HIP) (1)
- Hydrogen storage (1)
- Impact wear (1)
- In situ diffraction (1)
- In-situ SEM micro shear deformation (1)
- Inconel 625 (1)
- Indentation (1)
- Indentation hardness (1)
- Infrarotspektroskopie (1)
- Interdiffusion (1)
- Interface (1)
- Interfacial shear strength (1)
- Internal Sulfidation (1)
- Internal friction (1)
- Isostatic hot pressing (HIP) (1)
- Kikuchi pattern (1)
- Laboratory X-ray diffraction (1)
- Laser scanning microscopy (LSM) (1)
- Lattice parameters (1)
- Lebensdauervorhersage (1)
- Lifetime prediction (1)
- Light curing (1)
- Log-normal distribution (1)
- Long-term calculation (1)
- Low carbon steel (1)
- Magnetic domain distribution (1)
- Magnetic stray field (1)
- Magnetic stray fields (1)
- Magnetomechanical effect (1)
- Mars (1)
- Martensite (1)
- Martensitic transformation (1)
- Mass transport (1)
- Master curve (1)
- Material modeling (1)
- Metal Magnetic Memory (1)
- Metal magnetic memory (1)
- Microplastics (1)
- Microsegregation (1)
- Microstructur (1)
- Microstructure and texture (1)
- Microstructure evolution (1)
- Microwave technology (1)
- Mikrostruktur (1)
- Misorientation (1)
- Mobility (1)
- Modeling (1)
- Molecular dynamics (1)
- Multiaxial deformation (1)
- Multilayer (1)
- NGS (1)
- Nano-scratch test (1)
- Nanoparticle structure (1)
- Nanoscale multilayers (1)
- Natural silver wires (1)
- Near Infrared Spectroscopy (1)
- NiTi (1)
- Notch (1)
- Number density (1)
- Optical centrifugation (1)
- Orientation (1)
- Orientation refinement (1)
- Oxidation (1)
- Oxide coatings (1)
- Oxyfuel (1)
- PLS-DA (1)
- PV modules (1)
- Passive components and circuits (1)
- Permeability (1)
- Phase-field (1)
- Photocleavable organosilanes (1)
- Photopolymer composites (1)
- Phototrophs (1)
- Photovoltaic modules (1)
- Phytolith (1)
- Polymer (1)
- Polymer matrix composites (1)
- Polymeric Materials (1)
- Polypropylene (1)
- Polystyrene (1)
- Porcelain (1)
- Porosity (1)
- Powdered activated carbon (1)
- Power factor (1)
- Preceramic polymer (1)
- Precipitation (1)
- Pressure-assisted sintering (1)
- Production scatter (1)
- Pull-out composite materials (1)
- Pulveraktivkohle (1)
- Raman spectroscopy (1)
- Real-time qPCR (1)
- Relaxation (1)
- Resistance stress (1)
- Rhodonia placenta (1)
- Roughness (1)
- S-Phase (1)
- SEM (1)
- SEM wood characterization (1)
- SLM (1)
- Safety assessment (1)
- Sand blasting (1)
- Scanning acoustic microscopy (SAM) (1)
- Scanning electron microscopy (1)
- Scanning transmission electron microscopy (STEM) (1)
- Schädigung (1)
- Segregation (1)
- Self-Assembly (1)
- Sewage treatment plant (1)
- Shape memory alloys (1)
- Shear load (1)
- Shear testing (1)
- Single crystal superalloys (1)
- Single fiber pull-out test (1)
- Single-crystal (1)
- Sliding simulation (1)
- Slow crack growth (SCG) (1)
- Slurry optimization (1)
- Soil (1)
- Solar panels (1)
- Solid-State-Synthesis (1)
- Solid-state-synthesis (1)
- Sorption (1)
- Spray drying (1)
- Steam oxidation resistance (1)
- Steel P92 (1)
- Stereoscopy (1)
- Strain difference (1)
- Stress-strain-behavior (1)
- Structural steel (1)
- Sulfidation (1)
- Sulphidation (1)
- Superalloy (1)
- Superalloy single crystals (1)
- Superconducting magnet (1)
- Support configurations (1)
- Support vector machines (1)
- Surface modification (1)
- Surface nucleation (1)
- Synchrotron X-ray diffraction (1)
- T1 precipitate (1)
- TIG-welding (1)
- Thermal expansion (1)
- Thermo-mechanical loading (1)
- Thermoanalysis (1)
- Thermoelectric oxide (1)
- Thermoelectric oxides (1)
- Thermoelectrics (1)
- Thermogravimetrie (1)
- Thermogravimetry (1)
- Thickening (1)
- Thin tribofilm (1)
- Titanium (1)
- Tooth wear (1)
- Topography (1)
- Transmission electron microscopy (1)
- Transmittance (1)
- Tricalcium Phosphate (1)
- Vacancies (1)
- Vickers indentation (1)
- Viscoplasticity (1)
- Visualization (1)
- Volume fraction (1)
- Water (1)
- Water droplet erosion resistance (1)
- Wood protection (1)
- X-ray computed tomography (CT) (1)
- Young`s modulus (1)
Organisationseinheit der BAM
- 5 Werkstofftechnik (73)
- 5.1 Mikrostruktur Design und Degradation (28)
- 5.2 Metallische Hochtemperaturwerkstoffe (16)
- 5.4 Multimateriale Fertigungsprozesse (12)
- 5.3 Polymere Verbundwerkstoffe (10)
- 5.6 Glas (10)
- 8 Zerstörungsfreie Prüfung (8)
- 9 Komponentensicherheit (8)
- 5.5 Materialmodellierung (6)
- 7 Bauwerkssicherheit (5)
The sintering behavior and the thermoelectric performance of Ca3Co4O9 multilayer laminates were studied, and a multilayer thermoelectric generator was fabricated. Compacts and multilayer samples with anisotropic microstructure and residual porosity were obtained after conventional sintering at 920 °C, whereas dense and isotropic multilayer samples were prepared by firing at 1200 °C and reoxidation at 900 °C. A hot-pressed sample has a dense and anisotropic microstructure. Samples sintered at 920 °C exhibit low electrical conductivity due to the low density, whereas the Seebeck coefficient is not sensitive to preparation conditions. However, thermal conductivity of multilayers is very low, and, hence acceptable ZT values are obtained. A ransversal multilayer thermoelectric generator (TMLTEG) was fabricated by stacking layers of Ca3Co4O9 green tapes, AgPd conductor printing, and co-firing at 920 °C. The TMLTEG has a power output of 3 mW at ΔT =200 K in the temperature interval of 25 °C to 300 °C.
Soiling of photovoltaic (PV) systems compromises their performance causing a significant power loss and demanding periodical cleaning actions. This phenomenon raises great concerns in the solar energy field, thus leading to notable research efforts over the last decades. Soiling is caused by a dual action of dust deposition and biofouling. However, surprisingly, the microbiological contribution to PV soiling is often overlooked or underestimated. In this study, a variety of qPCR-based methods have been developed to quantify the microbial load of fungi, bacteria and phototrophs on PV panels. These protocols were evaluated by comparison with culturedependent methods, and were implemented with real solar plants for two years. The results show that the developed molecular methods are highly sensitive and reliable to monitor the microbial component of the soiling. Fungal biomass was clearly dominant in all analysed PV modules, while bacteria and phototrophs showed much lower abundance. Light microscopy and qPCR results revealed that melanised microcolonial fungi and phototrophs are the main biofilm-forming microorganisms on the studied solar panels. In particular, the fungal qPCR protocol is proposed as a useful tool for monitoring of PV soiling, and investigating the microbial contribution to specific soiling cases.
Temperature-induced, stress-induced martensitic phase transitions and martensite reorientation process in Ni rich (50.9 at.%) NiTi pseudoelastic NiTi wires with ultra-fine grained (UFG) microstructure were studied by electrical resistance measurements. Measurements of the electrical resistance as a function of temperature at different constant mechanical loads accompanied by complementary experiments with variable loads at constant temperature were performed. Results show that the transformation mechanisms in UFG microstructures exhibit a higher level of complexity when compared with those characterizing the behavior of other microstructures (e.g., recrystallized or larger grains size). It was found that a threshold stress level below 150 MPa delimits the transition from a homogeneous (low stress) to localized but reversible Lüders type transformation (high stress) when the transformations are induced under constant applied stress and that reorientation processes require stresses of 100 MPa in the present UFG wires. Even though the strain evolutions do not always show two distinct yielding events during cooling or heating, electrical resistance measurements proved that a two-step transformation involving R-phase and B19' martensite was always present in the extended range of temperatures and stresses investigated here.