Abstract:
The invention relates to an anti-wear coating, specifically for components which are subject to erosion under mechanical loading, in particular for gas turbine components, said coating comprising at least two different individual layers which preferably alternate with one another multiply and are applied to a surface of a component which is to be coated. The individual layers comprise a ceramic main layer (45, 46, 47, 48) and a quasi-ductile, non-metallic intermediate layer (41, 42, 43, 44).
Abstract:
Die Erfindung betrifft eine Verschleißschutzbeschichtung, speziell für erosionsbelastete Bauteile unter mechanischer Beanspruchung, insbesondere für Gasturbinenbauteile, die mindestens zwei verschiedene, vorzugsweise einander mehrfach abwechselnden, auf einer zu beschichtenden Oberfläche eines Bauteils aufgebrachte Einzelschichten umfasst. Die Einzelschichten umfassen eine keramische Hauptschicht (45, 46, 47, 48) und eine quasi-duktile, nicht-metallische Zwischenschicht (41, 42, 43, 44).
Abstract:
The invention refers to a sandwich arrangement comprising at least two peripheral disposed ceramic panels (101a, 101b) and a ceramic felt (110) which is inserted be- tween a first and second ceramic panel, The material of the first ceramic panel being equal or different to the material of the second panel, wherein the ceramic felt is formed by a textile structure with a regularly or quasi-regularly structured woven fi- bres. The fibres are made of at least one material and/or composition, wherein at least one adhesive mean is provided between the underside of the panels and adja- cent fibres.
Abstract:
An article of manufacture includes a first ceramic matrix composite (CMC) sheet having a number of flow passages therethrough, and an open-cell foam layer bonded to the first CMC sheet. The open-cell foam layer is an open-cell foam. The article of manufacture includes a second CMC sheet bonded to the open-cell foam layer, the second CMC sheet having a thermal and environmental barrier coating and having a number of flow passages therethrough.
Abstract:
A method for joining together two or more ceramic and/or metal parts by providing a braze consisting of a mixture of copper oxide, silver, and ceramic particulate. The braze is placed upon the surfaces of the parts, which are then held together for sufficient time and at a sufficient temperature to cause the braze to form a bond between the parts. The addition of the ceramic particulate increases the viscosity of the braze, decreasing squeeze out, decreasing the formation of air pockets, decreases the formation of brittle phases by providing nucleation sites and increases the flexural strength of the joint.
Abstract:
L' invention se rapporte à une structure filtrante de gaz chargés en particules comprenant une pluralité d'éléments filtrants du type en nid d'abeilles, ladite structure étant obtenue par l'assemblage desdits éléments, solidarisés les uns aux autres au moyen d'un ciment de joint, ledit ciment de joint étant un matériau composite essentiellement inorganique, de préférence minéral comprenant au moins, en masse et à l'exclusion de l'eau et des ajouts organiques éventuels; entre 30 et 95% d'une charge constituée par un ensemble de grains dont la température de fusion est supérieure à 1000 °C et dont lesdits grains ont un diamètre supérieur à 30 micromètres, entre 5 et 70% d'une matrice liante incorporant une phase géopolymère, ladite matrice liante comprenant, en pourcentage poids des oxydes correspondants : Si0 2 : entre 20 et 80%, A1 2 0 3 : entre 3 et 50%, R 2´ 0 : entre 3 et 30%, R 2´ 0 représentant la somme des oxydes d'alcalin présents dans la matrice liante.
Abstract:
A method of joining components includes the steps of providing a slurry including a solvent, a ceramic, metal or cermet powder and at least one binder selected from natural monomers or cross linkable polymer compositions. The binder is crosslinked to form a gel. The gel is then placed between the first and at least a second component to be joined. The gel is then sintered to form an article having a gelcast joint binding the first and second components. The resulting joint region will generally have the same strength as the first and second components.
Abstract:
A method for directly joining ceramics (10) and metals (12). The method involves forming a structure having a ceramic component (10), a more refractory metallic component and a less refractory metallic-material-based interlayer (14) disposed between the ceramic component (10) and the metallic component (12); adding a eutectic forming reactant to the metallic interlayer (14); and heating the structure to approximately a eutectic melting temperature of the reactant and the interlayer to form a metallic-material-based eutectic liquid that interacts with the metallic component to form a bond that directly joins the ceramic and metallic components to one another.