Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (53)
- Beitrag zu einem Tagungsband (38)
- Beitrag zu einem Sammelband (12)
- Vortrag (6)
- Posterpräsentation (4)
- Forschungsbericht (1)
Sprache
- Englisch (101)
- Deutsch (12)
- Mehrsprachig (1)
Schlagworte
- Corrosion (44)
- CCS (41)
- Steel (35)
- CO2-storage (18)
- Pipeline (17)
- High temperature corrosion (12)
- CO2-injection (9)
- Heat treatment (8)
- Supercritical CO2 (7)
- Aquifer (6)
Organisationseinheit der BAM
- 5 Werkstofftechnik (40)
- 5.1 Mikrostruktur Design und Degradation (40)
- 7 Bauwerkssicherheit (6)
- 7.6 Korrosion und Korrosionsschutz (6)
- 5.6 Glas (2)
- 8 Zerstörungsfreie Prüfung (2)
- 8.3 Thermografische Verfahren (2)
- 4 Material und Umwelt (1)
- 4.2 Material-Mikrobiom Wechselwirkungen (1)
- 5.2 Metallische Hochtemperaturwerkstoffe (1)
Eingeladener Vortrag
- nein (6)
Der Klimaschutz erfordert die Reduzierung des Ausstoßes von Kohlendioxid. Neue Kraftwerke mit Sauerstoffverbrennung und möglicherweise CO2-Abscheidung sollen eine Reduktion des CO2 im Bereich der Energietechnik ermöglichen. Die heute üblichen Hochtemperaturwerkstoffe werden anderen Umgebungsbedingungen ausgesetzt, und es sind andere Korrosionsraten und Korrosionsreaktionen zu erwarten. In diesem Beitrag werden die Kraftwerkstechnologien kurz vorgestellt und an einem Beispiel erläutert, dass die Oxidation an Luft mit der Oxidation in Wasser nicht direkt vergleichbar ist.
We present a new method for the complete three-dimensional (3D) calibration of scanning probe microscopes (SPM) and other high-resolution microscopes, e.g., scanning electron microscopes (SEM) and confocal laser scanning microscopes (CLSM), by applying a 3D micrometre-sized reference structure with the shape of a cascade slope-step pyramid. The 3D reference structure was produced by focused ion beam induced metal deposition. In contrast to pitch featured calibration procedures that require separate lateral and vertical reference standards such as gratings and step height structures, the new method includes the use of landmarks, which are well established in calibration and measurement tasks on a larger scale. However, the landmarks applied to the new 3D reference structures are of sub-micrometre size, the so-called 'nanomarkers'. The nanomarker coordinates are used for a geometrical calibration of the scanning process of SPM as well as of other instrument types such as SEM and CLSM. For that purpose, a parameter estimation routine involving three scale factors and three coupling factors has been developed that allows lateral and vertical calibration in only one sampling step. With this new calibration strategy, we are able to detect deviations of SPM lateral scaling errors as well as coupling effects causing, e.g., a lateral coordinate shift depending on the measured height position of the probe.
Influence of pressure and chromium content on corrosion reactions at 600°C in a CO2-H2O atmosphere
(2008)
Influence of pressure and chromium content on corrosion reactions at 600 C in a CO2-H2O atmosphere
(2008)
Oxidation of a single crystal nickel-base superalloy at 950 °C - a kinetic and microstructure study
(2008)
The nickel-base single crystal alloy investigated is a widely used material for first and second row blades in stationary gas turbines. Nickel-base superalloys are especially designed to resist high temperature oxidation by process gases. To determine this high temperature behaviour oxidation testing was carried out using samples cut perpendicular to (001)-direction. Microstructures were characterized by X-ray diffraction XRD, Light Microscopy LM, Scanning Electron Microscopy SEM, and X-ray energy dispersive spectroscopy (EDS), after a series of heat treatments (950 °C, 0 h - 1000 h). Mass gain and the respective thicknesses of the different oxide layers were measured to determine oxidation kinetics. In general, the isothermal oxidation behaviour at 950 °C, as defined by weight gain, follows a parabolic law with a parabolic rate constant around 1.4 · 10-2 mg2/(cm4 · h). A short incubation time is followed by the constitution of a multi-layered oxide scale. The oxide scale consists of a three layer structure. An outer scale contains a Ti-bearing thin film associated as TiO2 and NiTiO3 but mostly Cr attributed to Cr2O3, (Ni/Co)Cr2O4 beside NiTaO4. This outer scale is connected to a discontinuous layer of inner oxidation consisting mainly of Al2O3, which is followed by an area of γ´-depletion within the base material.