Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (78)
- Beitrag zu einem Tagungsband (70)
- Beitrag zu einem Sammelband (2)
- Posterpräsentation (2)
- Forschungsbericht (2)
- Vortrag (1)
- Sonstiges (1)
Sprache
- Englisch (85)
- Deutsch (70)
- Mehrsprachig (1)
Schlagworte
- X-ray refraction (22)
- Computed tomography (16)
- Geokunststoffe (16)
- Deponieverordnung (15)
- BAM-Zulassung (6)
- Corrosion (6)
- Kunststoffdichtungsbahnen (6)
- Radiography (5)
- Röntgenrefraktion (5)
- Synchrotron (5)
- Computertomographie (4)
- Diffuse background (4)
- Fluorescent screen (4)
- Röntgen-Refraktion (4)
- Synchrotron X-ray refraction radiography (4)
- Synchrotron radiation (4)
- Zulassung (4)
- Zulassungsrichtlinien (4)
- CE-Kennzeichnung (3)
- Deponie (3)
- Deponieabdichtungen (3)
- Geomembranes (3)
- Hinterleuchten (3)
- Keramik (3)
- Korrosion (3)
- Kunststoff-Dränelemente (3)
- Laser-induced periodic surface structures (LIPSS) (3)
- Metal matrix composites (3)
- Nichtrostender Stahl (3)
- Phase contrast (3)
- Pore orientation (3)
- Porous ceramics (3)
- Schweißen (3)
- Soft matter radiography (3)
- X-ray detector backlighting (3)
- Additive manufacturing (2)
- Beton (2)
- Bewehrungsgitter aus Kunststoff (2)
- CFK (2)
- Ceramic matrix composites (2)
- Ceramics (2)
- Chaboche model (2)
- Composites (2)
- Computed Tomography (2)
- Computer-Tomographie (2)
- Concrete (2)
- Creep (2)
- DIRECTT (2)
- Damage evolution (2)
- Defects (2)
- Deponieabdichtungssysteme (2)
- Diesel particulate filters (2)
- Diffraction Enhanced Imaging (2)
- Edge artefact (2)
- Efficiency testing (2)
- Fluoreszenzschirm (2)
- GTN model (2)
- Gas diffusion layer (GDL) (2)
- Geosynthetics (2)
- German landfill ordinance (2)
- Heat treatment (2)
- Huygens elementary waves (2)
- KorroPad (2)
- Korrosionsschnelltest (2)
- Landfill cover systems (2)
- Leak detection systems (2)
- Martensitic stainless steel (2)
- Microcracking (2)
- Microstructure (2)
- Non-destructive testing (2)
- Normung (2)
- Oberflächenausführung (2)
- Oxidation (2)
- POD (2)
- Phase grating (2)
- Quality control (2)
- Qualitätskontrolle (2)
- Radiographie (2)
- Railway (2)
- Refraction (2)
- Refraction enhanced imaging (REI) (2)
- Reliability (2)
- Röntgendetektor (2)
- Solid lipid nanoparticles (2)
- Stainless steel (2)
- Ultrashort laser pulses (2)
- Verarbeitung (2)
- Verbundwerkstoffe (2)
- Werkstoffauswahl (2)
- X-ray (2)
- X-ray computed tomography (2)
- X-ray imaging (2)
- X-ray photoelectron spectroscopy (2)
- X-ray refraction radiography (2)
- (ter-)pyridineterminated self-assembled monolayer (1)
- 2101 duplex stainless steel (1)
- 3D microstructure (1)
- 3D printing (1)
- 3D printing Polyamide 12 (1)
- 3D x-ray (1)
- 3D-Mikrostruktur (1)
- Abri Pataud (1)
- Absorption correction (1)
- Additive Fertigung (AM) (1)
- Additive Manufacturing (1)
- Additive manufacturing (AM) (1)
- Aktiv-Passiv-Element (1)
- AlSi10Mg alloy (1)
- Aluminium (1)
- Analyzer-Based Imaging (1)
- Antioxidant (1)
- Auslagerungsversuche (1)
- Autocalve testing (1)
- Axle (1)
- Axles (1)
- BAMline (1)
- Backlight (1)
- Bauproduktenverordnung (1)
- Bauwesen (1)
- Belüftungselement (1)
- Bending property (1)
- Beta-eucryptite (1)
- Bildgebende Röntgenverfahren (1)
- Bimetallkorrosion (1)
- Bulk metallic glasses (1)
- CFR-PEEK (1)
- CMAS - Calcium-Magnesium-Aluminiumsilikat (1)
- CT (1)
- Carbon Fiber Reinforced Plastics (1)
- Cathodic protection (1)
- Cavitation (1)
- Ceria (1)
- Characterization (1)
- Chemical analysis (1)
- Complex microstructure (1)
- Complex resistivity (1)
- Composite (1)
- Composite materials (1)
- Compression (1)
- Compression device (1)
- Computer tomography (1)
- Computertomografie (1)
- Computertomographie (CT) (1)
- Cordierit (1)
- Corrosion rate (1)
- Corrosion resistance (1)
- Corrosion testing (1)
- Crack detection (1)
- Crack evolution (1)
- Creep rupture (1)
- Crystal Texture (1)
- Cutlery (1)
- Cyclosporine A (1)
- DCI (1)
- DIVA Algorithm (1)
- DIVA algorithm (1)
- DL-EPR (1)
- Damage (1)
- Damage analysis (1)
- Delamination (1)
- Dental composite materials (1)
- Deponieabdichtung (1)
- Deponieabdichtunssysteme (1)
- Deponien (1)
- Deponieoberflächenabdichtungen (1)
- Deponietechnik - Landfill technology (1)
- Detector backlighting (1)
- Detektor (1)
- Dichtungskontrollsysteme (1)
- Diesel Fuel (1)
- Diesel Particulate Filter Materials (1)
- Divergenz (1)
- Drain core stability (1)
- Drawing layers (1)
- Drug nanocrystals (1)
- Ductile cast iron (1)
- Dunkelfeldabbildung (1)
- Duplex stainless steel (1)
- Duplexstähle (1)
- Dynamic fracture toughness (1)
- EPR-Test (1)
- Edelstahl Rostfrei (1)
- Einbau (1)
- Einkristall (1)
- Electrical relaxation (1)
- Electrochemical noise (1)
- Electrochemical potentiodynamic reactivation (1)
- Elektrochemie (1)
- Elektrochemisches Rauschen (1)
- Embedded cavities (1)
- Ermüdungsrisse (1)
- Europäische Normen (1)
- Explosivstoffe (1)
- FFF (1)
- Femtosecond laser (1)
- Festigkeit (1)
- Fiber de-bonding (1)
- Fiber reinforced dental post (1)
- Fiberglass composite (1)
- Filtering (1)
- Final Gravettian (1)
- Fluorescence screen (1)
- Folienelektrode (1)
- Free weathering (1)
- Fremdprüfung (1)
- Funktionsprüfung (1)
- Gas diffusion layer (1)
- Gefilterte Rückprojektion (1)
- Geocomposite drains (1)
- Geomembanes (1)
- Geometrical tortuosity (1)
- Geotechnik (1)
- Geotextile Filter (1)
- Geotextilien (1)
- Gitterinterferometrische Röntgenabbildung (1)
- Glass-ceramic (1)
- Grating interferometry (1)
- Gravettien final (1)
- Grinding (1)
- Hard X-ray photoelectron spectroscopy (HAXPES) (1)
- Hard coatings (1)
- Hierarchical micro-nanostructures (1)
- High temperature laser profilometry (1)
- High-temperature ceramics (1)
- Homogenization schemes (1)
- Hydrogen assisted cracking (1)
- Hydrogen embrittlement (1)
- Hydrogen‐induced stress corrosion cracking (1)
- Hydrophobic treatment (1)
- Hystersis (1)
- INCONEL 718 (1)
- In situ (1)
- In situ tensile test (1)
- In-situ (1)
- In-situ Zugbelastung (1)
- In-situ loading (1)
- Inhomogeneous materials (1)
- Installation (1)
- Interface (1)
- Internal Surfaces (1)
- Irradiation (1)
- Iterative Rekonstruktion (1)
- Ivoire de mammouth (1)
- Kerbschlagzähigkeit (1)
- Kleinwinkelstreuung (1)
- Konfokalmikroskopie (1)
- Konvergenz (1)
- Konzentrationselement (1)
- Korrosionsbeständigkeit (1)
- Korrosionsprüfung (1)
- Korrosionsschutz (1)
- Korrosionsuntersuchung (1)
- Korrosionsversuche (1)
- Kreislaufwirtschaft (1)
- Kunststoffdichtungsbahn (1)
- Kurzfaserverstärktes Polyamid (1)
- LTCC multilayer (1)
- Landfill (1)
- Landfill lining (1)
- Langzeitverhalten (1)
- Large Scale Facilities (1)
- Laser powder bed fusion (LPBF) (1)
- Laser processing (1)
- Limited view (1)
- Lipid polymorphism (1)
- Lochkeimbildung (1)
- Lochkorrosion (1)
- Long-term shear strength (1)
- Long-term water flow capacity (1)
- Low pressure lamination (1)
- Mammoth ivory (1)
- Marine atmosphere (1)
- Martensit (1)
- Material and damage behaviour (1)
- Material extrusion (MEX) (1)
- Material science (1)
- Mehrphasige Materialien (1)
- Mercury intrusion porosimetry (1)
- Metal fluorides (1)
- Metall-Matrix-Komposite (1)
- Metallic coatings (1)
- Micro X-ray fluorescence spectroscopy (1)
- Micro analysis (1)
- Micro fluidics (1)
- Micro-CT (1)
- MicroCT (1)
- MicroPIXE (1)
- Microcracked ceramics (1)
- Microporous layer (1)
- Mikrostruktur (1)
- Missing wedge (1)
- Modulations-Transfer-Funktion (MTF) (1)
- NDT (1)
- NEXAFS (1)
- Nachbehandlung (1)
- Nanocracks (1)
- Nanostructures (1)
- Nanostrukturen (1)
- Neutronen-Tomographie (1)
- Nichtrostende Stähle (1)
- Non-Destructive Evaluation (1)
- Nonlinear behavior (1)
- Nonlinear stress-strain curve (1)
- Nuclear magnetic resonance (1)
- Numerische Simulation (1)
- Oberflächenbehandlung (1)
- Oral administration (1)
- Oral bioavailability (1)
- Oxidative Alterung (1)
- Oxidative resistance (1)
- PE (1)
- PE-HD Sorption (1)
- PEM fuel cell (1)
- PP (1)
- Perles rectangulaires (1)
- Permeation measurements (1)
- Phase contrast radiography (1)
- Phase contrast-enhanced micro-CT (1)
- Phase transformation (1)
- Phasengitter (1)
- Pitting corrosion (1)
- Plasticity (1)
- Polyamid 12 (1)
- Polyamide 12 (1)
- Polymer electrolyte membrane fuel cell (1)
- Pore Orientation (1)
- Pore size analysis (1)
- Pore size distribution (1)
- Porenorientierung (1)
- Porosity (1)
- Porous Ceramics (1)
- Poröse Keramik (1)
- Prestressing steels (1)
- Prüfmethoden (1)
- Pseudo-Voigt fit function (1)
- Python (1)
- Quality management (1)
- Qualitätssicherung - Quality Assurement (1)
- Quantitative image analysis (1)
- Radiation shielding (1)
- Radiology (1)
- Rapid corrosion test (1)
- Reconstruction algorithm (1)
- Rectangular beads (1)
- Refraction topography (1)
- Refractory (1)
- Refraktionstopographie (1)
- Region of interest (1)
- Rekonstruktionsalgorithmen (1)
- Rekonstruktionsalgorithmus (1)
- Rekultivierung von Altlasten (1)
- Rissentwicklung (1)
- Rissfortschritt (1)
- Röntgen-Refraktions-Radiographie (1)
- Röntgen-Topographie und -Streuung (1)
- Röntgenbeugung (1)
- Röntgenverfahren (1)
- SLN (1)
- SXRR - Synchrotron X-ray Refraction Radiography (1)
- Safety (1)
- Sandimmun Neoral/Optoral (1)
- Sandstone (1)
- Scanning electron microscopy (1)
- Schadensanalyse (1)
- Schadensentwicklung (1)
- Schneidwaren (1)
- Selective laser melting (1)
- Si network disintegration (1)
- Sintering (1)
- Small angle scattering (1)
- Sol-gel synthesis (1)
- Specific surface (1)
- Spectral induced polarization (1)
- Stabilization (1)
- Stahlfasern (1)
- Stainless steels (1)
- Statistical analysis (1)
- Statistically relevant volumes (1)
- Statistische Bewertung (1)
- Stiffness (1)
- Strain hardening (1)
- Stress corrosion tests (1)
- Surface conditions (1)
- Surface topography (1)
- Surface treatment (1)
- Synchrotron Radiation (1)
- Synchrotron Tomography (1)
- Synchrotron X-ray imaging (1)
- Synchrotron X-ray refraction (1)
- Synchrotron X-ray tomography (1)
- Synchrotron imaging (1)
- Synchrotron radiography (1)
- Synchrotron, BAMline (1)
- Synchrotron-Radiographie (1)
- Synchrotronstrahlung (1)
- TBC - Thermal barrier coatings (1)
- THz (1)
- Talbot- Lau interferometry (1)
- Talbot-Lau Interferometrie (1)
- Talbot-Lau interferometer (1)
- Talbot-Lau interferometry (1)
- Tensile load (1)
- Test solutions (1)
- Testing methods (1)
- Thermally induced porosity (TIP) (1)
- Ti-6Al-4V alloy (1)
- TiMgN (1)
- Time-of-flight secondary ion mass spectrometry (ToF-SIMS) (1)
- Tomographische Rekonstruktionsalgorithmen (1)
- Tomography (1)
- Tortuosity (1)
- UT (1)
- Ultrahochleistungsbeton (1)
- Ultrasonics (1)
- Umwelttechnik/Umweltschutz - Environmental Technology/Protection (1)
- Versprödung (1)
- Viscoplastic (1)
- Visibility (1)
- WAXS (1)
- Wasserstoff (1)
- Water distribution (1)
- Water transport (1)
- Water transport path (1)
- Wavelet transform (1)
- Wavelet transformation (1)
- Welding (1)
- X-Ray Computed Tomography (1)
- X-Ray Refraction (1)
- X-Ray refraction (1)
- X-ray Photoelectron Spectroscopy (XPS) (1)
- X-ray Refaction radiography (1)
- X-ray absorption and refraction CT (1)
- X-ray caustics (1)
- X-ray detector (1)
- X-ray detector scattering (1)
- X-ray phase contrast (1)
- X-ray reefraction (1)
- X-ray tomography (1)
- Zahnstifte (1)
- Zerstörungsfreie Prüfung (1)
- Zirconia (1)
- Zugversuch (1)
- grating (1)
- refraction (1)
- standardization (1)
- topography (1)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (31)
- 8.5 Röntgenbildgebung (31)
- 6 Materialchemie (6)
- 6.1 Oberflächen- und Dünnschichtanalyse (6)
- 7 Bauwerkssicherheit (6)
- 7.6 Korrosion und Korrosionsschutz (5)
- 5 Werkstofftechnik (4)
- 5.3 Polymere Verbundwerkstoffe (3)
- 6.2 Material- und Oberflächentechnologien (3)
- 4 Material und Umwelt (2)
- 4.3 Schadstofftransfer und Umwelttechnologien (2)
- 5.4 Multimateriale Fertigungsprozesse (1)
- 7.5 Technische Eigenschaften von Polymerwerkstoffen (1)
- 8.0 Abteilungsleitung und andere (1)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (1)
- 9 Komponentensicherheit (1)
- 9.4 Integrität von Schweißverbindungen (1)
Paper des Monats
- ja (2)
Eingeladener Vortrag
- nein (1)
Evaluating porosity in cordierite diesel particulate filter materials, part 1 X-ray refraction
(2013)
Bi-continuous porous ceramics for filtration applications possess a particularly complicated microstructure, with porosity and solid matter being intermingled. Mechanical, thermal, and filtration properties can only be precisely estimated if the morphology of both solid matter and porosity can be quantitatively determined. Using x-ray absorption and refraction, we quantitatively evaluate porosity and pore orientation in cordierite diesel particulate filter ceramics. Porosity values turn out to agree with mercury intrusion measurements, while pore orientation factors agree with published crystallographic texture data.
While the problem of the identification of mechanisms of hydrogen assisted damage has and is being thoroughly studied, the quantitative analysis of such damage still lacks suitable tools. In fact, while, for instance, electron microscopy yields excellent characterization, the quantitative analysis of damage requires at the same time large field-of-views and high spatial resolution. Synchrotron X-ray refraction techniques do possess both features. In this work, we show how synchrotron X-ray refraction computed tomography (SXRCT) can quantify damage induced by hydrogen embrittlement in a lean duplex steel, yielding results that overperform even those achievable by synchrotron X-ray absorption computed tomography. As already reported in literature, but this time using a non-destructive technique, we show that the hydrogen charge does not penetrate to the center of tensile specimens. By the comparison between virgin and hydrogen-charged specimens, we deduce that cracks in the specimen bulk are due to the rolling process rather than hydrogen-assisted. We show that (micro)cracks propagate from the surface of tensile specimens to the interior with increasing applied strain, and we deduce that a significant crack propagation can only be observed short before rupture.
Complementary to Part 1 of this work, the bi-continuous microstructure of porous synthetic cordierite ceramics for filtration applications was investigated using 3D x-ray computed tomography at different resolutions. Applying both Fast Fourier Transform and a newly developed image analysis algorithm, we quantitatively evaluated porosity and pore orientation. The statistical approach allows extraction of spatially resolved or average values. Porosity values based on x-ray absorption agree with mercury intrusion measurements, while pore orientation factors agree with x-ray refraction data (Part 1 of this work), and with published crystallographic texture data.
The combination of tomographic, microstructural data with other experimental techniques and with modeling is paramount, if we want to extract the maximum amount of information on material and component properties. In particular, quantitative image analysis, statistical approaches, direct discretization of tomographic reconstructions represent concrete possibilities to extend the power of the tomographic 3D representation to insights into the material and component performance. This logic thread holds equally for industrial and academic research, and valorizes expensive experiments such as those carried out at synchrotron sources, which cannot be daily repeated. We shall show a few examples of possible use of X-ray tomographic data for quantitative assessment of damage evolution and microstructural properties, as well as for non-destructive testing. We will also show how X-ray refraction computed tomography (CT) can be highly complementary to classic absorption CT, being sensitive to internal interfaces.
Bikontinuierliche poröse Keramiken für Filteranwendungen weisen eine komplizierte Mikrostruktur auf, in der Poren und Festkörperphase 'vermischt' sind. Mechanische, thermische sowie Filtereigenschaften können nur präzise bestimmt werden, wenn die Morphologie beider Phasen quantitativ angegeben werden kann. Hier werden unter Anwendung von 3D Computertomographie (CT) und verschiedenen Techniken, die auf der Röntgenrefraktion basieren, die Porosität und die Porenorientierung in keramischen Cordierit-Dieselpartikelfiltern bewertet. Dabei werden zur Auswertung der Tomogramme die Fouriertransformierten sowie eine neu entwickelte richtungssensitive Bildanalyse (DIVA, directional interface variance analysis) angewandt. Sowohl die genannten Messtechniken als auch der statistische Ansatz gestatten die Extraktion optional ortsaufgelöster oder gemittelter Werte. Es ergeben sich sehr gute Übereinstimmungen der experimentell ermittelten Porositätswerte mit Ergebnissen aus Quecksilberintrusionsversuchen als auch der ermittelten Porenorientierung im Vergleich zu publizierten Angaben zur kristallographischen Textur. Dies legt den Schluss nahe, dass die Kenntnis der Grenzflächen (zwischen Poren und Materie) genügt, die morphologischen Eigenschaften solcher Materialien hinreichend zu beschreiben.
Bi-continuous porous ceramics for filtration applications possess a particularly complicated microstructure, whereby porosity and solid matter are intermingled. Mechanical, thermal, and filtration properties can only be precisely estimated if the morphology of both solid matter and porosity can be quantitatively determined. Using 3D computed tomography (CT) at different resolutions, and several X-ray refraction-based techniques, we quantitatively evaluated porosity and pore orientation in cordierite diesel particulate filter ceramics.Moreover, applying both Fast Fourier Transform (FFT) and a newly developed image analysis algorithm (directional interface variance analysis, DIVA), we quantitatively evaluated porosity and pore orientation. Both the experimental techniques and the statistical approach allow extraction of spatially resolved or average values.Porosity values from synchrotron computed tomography used turn out to agree with mercury intrusion measurements, while pore orientation factors agree with published crystallographic texture data. This latter point also implies that the study of the pore/matter interface is sufficient to describe the morphological properties of these materials.
Im Zusammenhang mit Planungs- und Entwicklungsaufgaben, den Forderungen in Normen und Regelwerken, in betrieblichen Arbeitsanweisungen, den Vorgaben für Zulieferteile oder bei der Auseinandersetzung mit Schadensfällen stellen sich häufig Fragen zum Korrosionsschutz sowie zu entsprechenden Prüf- und Untersuchungsverfahren. Die daraus gewonnenen Ergebnisse sollen z. B. eine Eignung von Werkstoffen oder Schutzsystemen unter spezifischen Einsatzbedingungen, die Dauerhaftigkeit des Schutzes, den Nachweis einer gleichbleibenden Qualität, die Vergleichbarkeit bekannter mit neuen Korrosionsschutzkonzepten oder den Wirkungsnachweis für gezielte Systemeingriffe belegen. Schnell wird deutlich, dass sich aus dem Blickwinkel verschiedener Branchen ganz unterschiedliche Anforderungsprofile ergeben, die ihren Niederschlag dann in unterschiedlichen Strategien der Prüf- und Untersuchungsverfahren finden.