Abstract:
A stator component of a turbomachine is composed substantially of at least one axially extending outer ring (10) which serves as a frame of an inner ring composed of partial segments (20). The partial segments are arranged on one another such that, on the rotor side, they form a coherent circular circumferential surface in relation to the rotational movement of rotor blades (30). The individual partial segment (20) is composed of a material of uniform construction or, at least in a radial direction, of multiple partial bodies constructed from different materials, such as for example ceramic, wherein a partial segment thus formed exhibits predetermined stress and/or expansion behaviour as a function of the load ranges of the turbomachine.
Abstract:
A coated article has: a metallic substrate (22); a bondcoat (30); and a thermal barrier coating (TBC) (28). The bondcoat has a first layer (32) and a second layer (34), the first layer having a lower Cr content than the second layer.
Abstract:
A pulse jet engine comprising a quarter wave gas resonator (1) which is arranged to cycle at an ultrasonic frequency, wherein the resonator (1) is closed, or substantially closed, to gas flow at the pressure antinode (4) thereof. The shape and dimensions of the quarter wave gas resonator (1) at least partially determine the ultrasonic frequency at which the resonator (1) cycles.
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:
A coating system on a superalloy or silicon-containing substrate of an article exposed to high temperatures. The coating system includes a coating layer that overlies the substrate and is susceptible to hot corrosion promoted by molten salt impurities. A corrosion barrier coating overlies the coating layer and contains at least one rare-earth oxide-containing compound that reacts with the molten salt impurities to form a dense, protective byproduct barrier layer.
Abstract:
A method for providing a fluid cooling system within a high temperature component is described. At least one microchannel is formed in an external surface of the component; and one or more coolant passage holes are then formed, extending from at least one of the microchannels to an interior region of the component. A layer of a metallic structural coating is then applied over the external surface. At least one slot, or a set of relatively small passive cooling holes, are then formed through the metallic structural coating; extending into at least a portion of the microchannels. A second coating layer is then applied over the first layer. In some embodiments, a sacrificial material is deposited into the microchannels before the first coating layer is applied. Related articles are also described.
Abstract:
A section of a turbine blade includes a fiber composite material having a matrix and fibers embedded therein. The matrix includes nanoparticles that are distributed in or on the matrix. The turbine blade can for example be used as a rotor blade in the final stage of a condensing steam turbine.
Abstract:
A process for extending the cyclic service life of thermal barrier coatings made of yttrium-stabilized zirconium oxide (YSZ) or the like which have been applied to a substrate with an oxidizing bond coat in between includes increasing or long-term stabilizing the strain tolerance of the thermal barrier coating.
Abstract:
A process for extending the cyclic service life of thermal barrier coatings made of yttrium-stabilized zirconium oxide (YSZ) or the like which have been applied to a substrate with an oxidizing bond coat in between includes increasing or long-term stabilizing the strain tolerance of the thermal barrier coating.
Abstract:
A ceramic abradable material is provided for use for clearance control between turbine blade tips and the shroud or casing in gas turbine engines for industrial and/or aerospace applications. The ceramic abradable material includes an yttria stabilized zirconia (YSZ) that is doped in alumina (Al2O3). The ceramic abradable in accordance with the invention is a soft abradable material that provides for increased erosion resistance as well as the ability of the turbine blade tips to cut into the abradable without causing them damage. These properties allow for optimum tolerances within the gas turbine engine which results in superior efficiency and performance.
Abstract translation:提供陶瓷耐磨材料用于在用于工业和/或航空应用的燃气涡轮发动机中的涡轮机叶片尖端与罩壳或套管之间的间隙控制。 陶瓷耐磨材料包括掺杂在氧化铝(Al 2 O 3)中的氧化钇稳定的氧化锆(YSZ)。 根据本发明可磨损的陶瓷是柔软的耐磨材料,其提供增加的抗侵蚀性,以及涡轮叶片尖端切割成可磨损而不致使其损坏的能力。 这些性能允许在燃气涡轮发动机内的最佳公差,这导致优异的效率和性能。