Abstract: A blade outer airseal has a body comprising: an inner diameter (ID) surface; an outer diameter (OD) surface; a leading end; and a trailing end. The airseal body has a metallic substrate and a coating system atop the substrate along at least a portion of the inner diameter surface. At least over a first area of the inner diameter surface, the coating system comprises an abradable layer system comprising a plurality of layers including a relatively erosion-resistant first layer atop a relatively abradable second layer.

Abstract: An air seal in a gas turbine engine comprising a substrate. A bond coating layer is adhered to the substrate. An abradable layer is adhered to the bond coating layer. The abradable layer comprises a metal matrix discontinuously filled with a soft ceramic material.

Abstract: A seal arrangement for reducing the seal gaps within a rotary flow machine, preferably an axial turbomachine, has rotor blades and guide vanes, which are respectively arranged in at least one rotor blade row and guide vane row and have respective blade/vane roots (2,3) which protrude into fastening contours within the rotor blade and guide vane rows. A sealing element (4) of plastically deformable material is provided between at least two adjacent blade/vane roots (2,3) along a rotor blade row or guide vane row or between a blade/vane root (2,3) of a rotor blade or guide vane and a rotary flow machine component directly adjoining the blade/vane root.

Abstract: A mechanical seal rotary joint of the end-face contact type which permits slurry fluids, such as polishing solution, to pass through a fluid passage without leaking out of the relatively rotating contact area therein. The rotary joint of the present invention comprises: a first joint body (1); a second joint body (2) connected rotatably to the first joint body (1); a prime seal unit (3) provided between the opposed end portions (11, 21) of the two joint bodies (1, 2); and a continuous line of prime fluid passage (6).

Abstract: The invention relates to a cylinder liner made from a hypereutectic aluminum/silicon alloy which is surrounded by a surround casting material, which is characterized in that the minimum ratio of the wall thickness of the surround casting material of the cylinder liner is 1.4.

Abstract: There are disclosed a damper plate for a rotary machine and a method for producing thereof which makes it possible to produce a honeycomb-type damper plate with accurate dimensions and reasonable cost. In the method for producing a damper plate for sealing between a rotating portion and a stationary portion of a rotary machine and cushioning said rotating portion, the damper plate has a plurality of convex portions and concave portions, and a plurality of the convex portions and the concave portions are processed by a superplastic processing method.

Abstract: An electrochemical sensor for determining the oxygen content of gases of internal combustion engines includes a ceramic element that is inserted with a sealing ring into a housing. The sealing ring is built up from different metal layers. The arrangement of the metal layers proceeds from a metal support which is composed of a steel alloy. The sealing ring is covered on both sides with a roll-clad copper layer. A nickel layer can additionally be arranged beneath the copper layer.

Abstract: Thermally sprayable powders for the formation of abradable seals and abradable seals formed by thermally spraying the powders include an alloyed metal phase material and a solid lubricant ceramic phase material. The alloyed metal phase material includes a major amount of a matrix metal which can be one or more of Ag or Cu, at least one melting point depressing metal which can be one or more of Si, B, Mn, or Al, and at least one oxidation resistant metal which can be one or more of Al, Cr, or Si. The solid lubricant ceramic phase is preferably hexagonal boron nitride, molybdenum sulphide, graphite, talc, bentonite or mica. Abradable seals formed by thermally spraying the powders are suitable for use with Ti alloy blades at temperatures up to 700.degree. C.

Abstract: A sealing structure for an airtight chamber includes a first division member and a second division member being repeatedly joined and disjoined. The first and second chamber members are joined together to define the chamber between them and disjoined to allow access to the chamber. The structure also includes a sealing member pressed between the first and second division members to keep the chamber airtight against a pressure difference between the exterior and the interior of the chamber while the first and second division members are joined. The first and second division members are made of a material with hardness lower than that of the sealing member and are formed with a groove. The structure also includes seat members being embedded in the grooves and pressed against the sealing member while the first and second division members are joined. The seat member is made of a material harder than the division member and welded in said groove only along its contacting surfaces with the groove.

Abstract: A seal for a sensor element of a gas sensor for determining the oxygen content in gases including exhaust gases of an internal combustion engine, which seal seals the sensor element in a longitudinal bore of a housing, the seal including a sealing stack which is positioned within the longitudinal bore of the housing and around the sensor element in use and which is comprised of two sealing bodies and an additional seal positioned between the two sealing bodies. The two sealing bodies are comprised of a pre-sintered ceramic material. The additional seal is comprised of a pre-pressed powder material and has a porosity which is lower than that of the two sealing bodies. The two sealing bodies and the additional seal are compressed together within the longitudinal bore in use, whereby at least the additional seal is deformed so that the sensor element is sealed in a gap-free manner within the longitudinal bore.