Abstract:
Die vorliegende Erfindung betrifft ein Gasturbinenbauteil aus einem Grundwerkstoff (1) mit einem darauf vorgesehenen Erosionsschutz-Beschichtungssystem, welches ein Mehrschichtsystem aus mindestens einer duktilen, metallischen Schicht und mindestens einer harten, keramikhaltigen Schicht zur Bildung eines Erosionsteilschutzsystems (3) umfasst, wobei mindestens eine Korrosionsschutzschicht (2) zwischen Erosionsteilschutzsystem (3) und Grundwerkstoff (1) vorgesehen ist, die gegenüber dem zu beschichtenden Grundwerkstoff ein niedrigeres elektronisches Potenzial als der Grundwerkstoff aufweist, so dass ein kathodischer Korrosionsschutz ausgebildet ist, sowie ein Verfahren zur Herstellung eines entsprechenden Erosionsschutz-Beschichtungssystems umfassend die Schritte: a) Aufbringen einer kathodischen Korrosionsschutzschicht (2); b) Aufbringen eines mehrlagigen Erosionsteilschutzsystems (3) mittels physikalischer Dampfphasenabscheidung (PVD physical vapour deposition).
Abstract:
The present invention relates to a method of repairing intake coatings (12), in particular intake coatings for use in compressor and turbine components, wherein the process comprises the following steps: a) filling of a damaged place (10) of the inlet coating (12) with a material (18) whose material composition corresponds to that of the intake coating (12) or is comparable to this or whose materials properties are comparable to the materials properties of the intake coating (12); b) drying of the material (18) introduced into the damaged place (10); c) application of a diffusion donor layer (20) over the region of the damaged place (10) and onto the introduced material (18); and d) heat treatment of the intake coating (12) at least in the region of the damaged place (10) to effect local diffusion of at least one metallic element from the diffusion donor layer (20) into the introduced material (18).
Abstract:
The invention concerns a component (11) such as a hydraulic component, made of composite material with organic matrix and reinforcing fibres (22-24), coated at least locally with a protective or metal reinforcement or metal-based layer. It comprises metal or metal-based fibres (21), said layer being formed by electrolytic deposition on said metal or metal-based fibres.
Abstract:
Known protective coatings having a high Cr content, as well as silicon, have brittle phases that become additionally brittle under the influence of carbon during use. A protective coating is provided. The protective coating includes the composition of 24% to 26% cobalt, 10% to 12% aluminum, 0.2% to 0.5% yttrium, 12% to 14% chromium, and the remainder nickel.
Abstract:
A method for repairing a component such as a turbine blade is provided. At the end of its operating time, the component has, for example, a depletion of aluminium in a region near the surface. The application of a repair layer is provided including particles with an increased proportion of aluminium. A subsequent heat treatment may achieve the effect of equalizing the concentration of aluminium between the repair layer and the region near the surface, and so the aluminium content required for new components is achieved again.
Abstract:
Turbine components are often shipped individually and are not shipped assembled into a turbine. To this end, the turbine blade has to be protected of external stresses and external damage. This is done by an easily removable protective coating that easily evaporates during the first operation of the newly produced or restored component, so that the protective coating does not have to be removed in an additional operational step before installation.
Abstract:
A thermal insulating ceramic layer for use on metal alloy components exposed to hostile thermal and chemical environment, such as a gas turbine. The thermal barrier coating may include cracks made by a series of steps, including subjecting at least a portion of the thermal barrier coating to a shockwave such that microcracks are formed in the thermal barrier coating without also substantially deforming the substrate.
Abstract:
A reaction control material that is Co, Cr or Ru, or an alloy having main component selected from a group consisting of Co, Cr, Ru is applied to the surface of an Ni-base superalloy before applying aluminum diffusion coating to the Ni-base superalloy. Thereby, it is possible to enhance the oxidation resistance of the Ni-base superalloy, and to control formation of a secondary reaction zone.