Wissenschaftliche Artikel der BAM
Filtern
Dokumenttyp
- Zeitschriftenartikel (62) (entfernen)
Sprache
- Englisch (62) (entfernen)
Schlagworte
- Laser-induced periodic surface structures (LIPSS) (21)
- Femtosecond laser (6)
- Radiation protection (6)
- Laser processing (5)
- Surface functionalization (5)
- Corrosion (4)
- Ultrashort laser pulses (4)
- Friction (3)
- High entropy alloy (3)
- Laser ablation (3)
- Laser-induced X-ray emission (3)
- Ultrashort pulsed laser (3)
- XANES (3)
- Anodization (2)
- Bacterial attachment (2)
- Biofilms (2)
- Direct laser interference patterning (DLIP) (2)
- Electrochemistry (2)
- Femtosecond laser ablation (2)
- Femtosecond laser processing (2)
- Laser-induced oxide layer (2)
- Laser-induced x-ray emission (2)
- Mechanochemistry (2)
- Metal-organic-frameworks (2)
- Microbiologically influenced corrosion (2)
- Niobium (2)
- Oxidation (2)
- Passivation (2)
- Polycarbonate (2)
- Stainless steel (2)
- Tribology (2)
- Ultrashort laser material interaction (2)
- Wear (2)
- X-ray photoelectron spectroscopy (2)
- AFM (1)
- AZ31 (1)
- Additives (1)
- Aluminum alloys (1)
- Amorphization (1)
- Antibacterial surfaces (1)
- Applications (1)
- Artificial Intelligence (AI) (1)
- Automation (1)
- Bacterial adhesion (1)
- Bacterial lipopolysaccharides (1)
- Biocorrosion (1)
- Biofilm (1)
- Biofilm formation (1)
- Biomimetic (1)
- Biomimicry (1)
- Bone screws (1)
- Bulk metallic glasses (1)
- Bulk temperature (1)
- Buried interfaces (1)
- CCMat (1)
- Calamistrum (1)
- Capillary waves (1)
- Carbon dioxide reduction (1)
- Cell appendages (1)
- Cell-repellent surfaces (1)
- Chalcopyrite (1)
- Chemical analysis (1)
- Chemically Complex Materials (1)
- Coatings (1)
- Conditioning films (1)
- Conservation (1)
- Corrosion monitoring (1)
- Corrosion protection (1)
- Creep (1)
- Cribellate spiders (1)
- Crystallization (1)
- Cultural heritage (1)
- Cyclic Voltammetry (1)
- Dentistry (1)
- Direct laser interference patterning (1)
- Dynamic light scattering (1)
- Editorial (1)
- Electrocatalysis (1)
- Electrochemical treatment (1)
- Electromagnetic theories (1)
- Electron backscattering diffraction (EBSD) (1)
- Electron microscopy (1)
- Electrophoresis (1)
- Electrospinning (1)
- Elektrolyse (1)
- European funding strategies (1)
- Eutectic (1)
- F pili (1)
- Femtosecond laser patterning (1)
- Femtosecond laser-processing (1)
- Flow system (1)
- Free electron laser (1)
- Fuel sorption (1)
- Functional properties (1)
- Grain orientation (1)
- Hard X-ray photoelectron spectroscopy (HAXPES) (1)
- Hexagonally-arranged nano-protrusions (1)
- Hierarchical micro-nanostructures (1)
- Hierarchical structures (1)
- High density polyethylene (1)
- Homogenization (1)
- Human fibroblast growth factors (1)
- Implant material (1)
- In situ X-ray diffraction (1)
- In situ atomic force microscopy (1)
- Industrial application (1)
- Industrial applications (1)
- Intrinsically conducting polymers (1)
- Iron (1)
- Iron reducing bacteria (1)
- Laser Machining (1)
- Laser cleaning (1)
- Laser damage (1)
- Laser-induced forward transfer (1)
- Laser-induced micro- and nanostructures (1)
- Laser-induced nanostructures (1)
- Laser-induced periodic surface strctures (LIPSS) (1)
- Laser-induced periodic surface structures, LIPSS (1)
- Laser-modified surface (1)
- Lattice misfit (1)
- Literature survey (1)
- Local corrosion (1)
- Localised corrosion (1)
- Macroion/growth factor assemblies (1)
- Magnesium alloys (1)
- Material Acceleration Platforms (MAPs) (1)
- Matter reorganization theories (1)
- Medical implants (1)
- Medium entropy alloy (1)
- Methane (1)
- Methanogen (1)
- Micro-concentrator solar cell (1)
- Microbial adhesions (1)
- Microbially influenced corrosion (MIC) (1)
- Microbiological Corrosion (1)
- Microscopy (1)
- Mixed-ligand MOFs (1)
- Modeling (1)
- Modelling (1)
- Multi-principal element alloys (1)
- Multi-prinicpal element alloys (MPEAs) (1)
- Multilayercoatings (1)
- Multiport (1)
- Nanofibers (1)
- Nanostructures (1)
- Nanostructuring (1)
- Near-field spectroscopy (1)
- Neurotrophins (1)
- Nobel-metal free electrocatalysis (1)
- Ophthalmology (1)
- Photovoltaics (1)
- Plasmonic nanofocusing (1)
- Polyelectrolytes (1)
- Polyethylene (1)
- Polyethylene terephthalate (1)
- Polysaccharides (1)
- Polystyrene microparticles (1)
- Protection housing (1)
- Pseudomonas aeruginosa (1)
- Pulse Laser (1)
- Pulsed laser ablation (1)
- Pump-probe experiments (1)
- Resins (1)
- SKPFM (1)
- Scanning Kelvin probe force microscopy (1)
- Scanning electrochemical microscope (SECM) (1)
- Second-generation high temperature superconductor technology (1)
- Secondary hazard (1)
- Self-assembled monolayers (1)
- Self-driving-labs (SDLs) (1)
- Self-organization (1)
- Silicon (1)
- Silk (1)
- Spectroscopic imaging ellipsometry (1)
- Spectroscopy (1)
- Stainless Steel (1)
- Steel (1)
- Structural Materials (1)
- Superconductivity (1)
- Surface analysis (1)
- Surface chemistry (1)
- Surface plasmon polaritons (1)
- Surface processing (1)
- Surface structures (1)
- Surface superconductivity (1)
- Swell-capture (1)
- Thin films (1)
- Ti-6Al-4V alloy (1)
- Ti6Al4V alloys (1)
- Time-of-flight secondary ion mass spectrometry (ToF-SIMS) (1)
- Time-resolved scattering (1)
- Titanium (1)
- Titanium alloys (1)
- Transmission electron microscopy (1)
- Transpassive dissolution (1)
- UV-irradiation (1)
- Ultra-short pulse laser processing (1)
- Ultrashort laser processing (1)
- Ultrashort lasers (1)
- Ultrashort pulse laser processing (1)
- Vascular endothelial growth factor (1)
- X-ray diffraction (1)
- X-ray emission (1)
- X-ray emission hazards (1)
- X-ray energies (1)
- X-ray spectrum (1)
- XPS (1)
Organisationseinheit der BAM
- 6.2 Material- und Oberflächentechnologien (62) (entfernen)
Paper des Monats
- ja (4)
In laser machining with ultrashort laser pulses unwanted X-ray radiation in the keV range can be generated when a critical laser intensity is exceeded. Even if the emitted X-ray dose per pulse is low, high laser repetition rates can lead to an accumulation of X-ray doses beyond exposure safety limits. For 925 fs pulse duration at a center wavelength of 1030 nm, the X-ray emission was investigated up to an intensity of 2.6 × 10^14 W/cm2. The experiments were performed in air with a thin disk laser at a repetition rate of 400 kHz. X-ray spectra and doses were measured for various planar target materials covering a wide range of the periodic table from aluminum to tungsten. Without radiation shielding, the measured radiation doses at this high repetition rate clearly exceed the regulatory limits. Estimations for an adequate radiation shielding are provided.
Commercial grade-1 titanium samples (Ti, 99.6%) were treated using three alternative methods, (i) femtosecond laser processing, (ii) thermal heat treatment, and (iii) electrochemical anodization, respectively, resulting in the formation of differently conditioned superficial titanium oxide layers. The laser processing (i) was carried out by a Ti:sapphire laser (pulse duration 30 fs, central wavelength 790 nm, pulse repetition rate 1 kHz) in a regime of generating laser-induced periodic surface structures (LIPSS). The experimental conditions (laser fluence, spatial spot overlap) were optimized in a sample-scanning setup for the processing of several square-millimeters large surface areas covered homogeneously by these nanostructures. The differently oxidized titanium surfaces were characterized by optical microscopy, micro Raman spectroscopy, variable angle spectroscopic ellipsometry, and instrumented indentation testing. The tribological performance was characterized in the regime of mixed friction by reciprocating sliding tests against a sphere of hardened steel in fully formulated engine oil as lubricant. The specific tribological performance of the differently treated surfaces is discussed with respect to possible physical and chemical mechanisms.