Abstract:
Ceramic layers are often used for heat insulation in a layer system, and have a high porosity therefor. The inventive porous ceramic heat insulating layer has a particular pore size distribution such that it has a high expansion tolerance even at temperatures higher than 1200°C.
Abstract:
The invention relates to a product (1), especially a gas turbine blade (1), having a metallic base (2) on which a protective layer (3, 4) is bonded for protecting against corrosion. The protective layer (3, 4) comprises an inner layer (3) made of a first MCrAlY alloy and of an outer layer (4) which is made of a second MCrAlY alloy and which is bonded on said inner layer (3). The second MCrAlY alloy is mainly present in the gamma -phase. The invention also relates to a method for producing a protective layer (3, 4), whereby the outer layer (4) is produced by remelting an area of the inner layer (3) or by depositing an MCrAlY alloy in a liquid phase.
Abstract:
Durch die Verwendung zweier verschiedener Materialien im Bereich der Durchgangslöcher (13) und außerhalb der Durchgangslöcher (13) wird die Abplatzung von keramischem Material vermieden.
Abstract:
The invention relates to a component (6) with a substrate (2) and a protective layer (9), which consists of an intermediate NiCoCrAlY layer zone (7) on or near the substrate (2) and an outer layer zone (8) arranged on the intermediate NiCoCrAlY layer zone (7), wherein the outer layer zone (8) posses the structure of the phase ²-NiAl and comprises (in wt%): 17% - 23% A1, 6% - 11% Co, and Ni balance.
Abstract:
Sistema de capas (1) con un substrato (4), con una capa intermedia (7) y con partículas (10) de granulado grueso, que están presentes sobre la capa intermedia (7), caracterizado porque las partículas (10) de granulado grueso presentan diámetros del grano mayores que 80 micrómetros, especialmente mayores de 100 micrómetros, porque las partículas (10) presentan una composición MCrAlY, porque la capa intermedia (7) presenta una composición MCrAlY, en la que M representa un elemento del grupo de hierro, cobalto y níquel, y porque sobre las partículas (10) está aplicada una capa cerámica exterior (16).
Abstract:
Method of coating substrate having at least one opening hole involves covering the hole with a plug of wax, electrochemically depositing at least one coating layer and treating the outer surface of the coating either with an electron beam or laser, to improve the adhesion and homogenize the particles in the upper zone of the coating. To coat a substrate (1), which has at least one opening hole (4), the hole(s) is (are) initially covered by a plug (16) of wax, etc. At least one coating layer (13) is applied electrochemically at a low temperature of at most 250 degreesC and preferably at most 100 degreesC. The outer surface (15) of the coating is treated with an electron beam or a laser and the like, to improve the adhesion and homogenize the particles in the upper zone of the coating, by melting the zone immediately under the upper surface. The coating layer is of a ceramic thermal insulation layer or a metal.
Abstract:
Durch gezielte Auswahl der Zugaben von Oxiden zu Zirkonoxid wird ein keramisches Material bereitgestellt, insbesondere für die Verwendung eines Schichtsystems, das einen hohen Sinterwiderstand, hohe Dehnungstoleranz und geringe Wärmeleitfähigkeit aufweist.
Abstract:
Durch ein keramisches Material mit den Stabilisatoren Yttriumoxid sowie zumindest eines der Materialien Erbiumoxid oder Ytterbiumoxid wird eine sinterstabile Phase für ein keramisches Material für keramische Schichten und ein keramisches Schichtsystem aufgezeigt, das die mechanischen und thermischen Eigenschaften auch beim Einsatz von hohen Temperaturen lange Zeit aufweist.