Abstract: An acoustic core may include an array of resonant cells configured as a plurality of resonant cell groups. The resonant cell groups may include a plurality of resonant cells configured as a partitioned resonant cell that include a converging resonant cell and a diverging resonant cell. The converging resonant cell and the diverging resonant cell may be defined by a plurality of cell walls integrally formed with one another and a partition integrally formed with the plurality of cell walls. The partition may at least partially delimit the converging resonant cell from the diverging resonant cell. The converging resonant cell may define an upper resonant space delimited by the partition and a top face of the array of resonant cells. The diverging resonant cell may define a lower resonant space delimited by the partition and a bottom face of the array of resonant cells.

Abstract: A zip fastener (10) comprises two opposed sets of teeth (14) which are shaped such that those on one set (12a) can fit between those on the other set (12b). At least some adjacent teeth of opposed sets (12a, 12b) have facing surfaces (17a, 17b) shaped so as engage and to inhibit lateral separation of the sets, and such that each tooth can undergo at least limited angular movement relative to the adjacent tooth. The teeth (14) within a set (12) are held at a predetermined spacing along the set by linking strips (16) aligned generally along the centre line of the set (12). Each tooth (14) defines a strip location (20) facing the opposed set of teeth, such that the linking strip (16) on one set (12a) fits in the strip location (20) on the other set (12b). Since the tooth spacing is set by the linking strips (16), the sets (12) of teeth (14) can lie on a curved path.

Abstract: A coated article is prepared by furnishing a nickel-base article substrate having a free sulfur content of more than 0 but less than about 1 part per million by weight. A protective layer is formed at a surface of the article substrate. The protective layer includes a platinum aluminide diffusion coating. The protective layer may be substantially yttrium-free, or have a controlled amount of yttrium. A ceramic layer may overlie the protective layer.

Abstract: The invention is a brace donned circumferentially around the distal radioulnar joint that provides adjustable compression of the proximal portion of the distal radioulnar joint that is independent of adjustable compression of the distal portion of the distal radioulnar joint. Compression is maintained by a fastening means.

Abstract: A metering plate includes a body having a first end and a second end, at least one opening extending through the body, and at least one projection extending outwardly from the body. The body is configured to be resistance welded to at least one of a turbine engine blade and a turbine engine stator vane using the projection such that the body at least partially controls fluid flow into at least one of the turbine engine blade and the turbine engine stator vane.

Abstract: A method for fabricating a turbine engine blade. The method includes providing a resistance welding system, and welding a metering plate to the turbine engine blade using the resistance welding system.

Abstract: A coated nickel-base superalloy article, which is otherwise susceptible to the formation of a secondary reaction zone, is prepared by furnishing a nickel-base superalloy article substrate having thereon an initial aluminum-containing coating comprising an initial-coating additive zone and an initial-coating diffusion zone. The article is susceptible to the formation of the secondary reaction zone if heated to an elevated SRZ reaction temperature for an SRZ reaction period of time. The formation of the secondary reaction zone is avoided by first removing the initial-coating additive zone and the initial-coating diffusion zone, and thereafter depositing a subsequent aluminum-containing coating onto the article substrate. The subsequent aluminum-containing coating includes a subsequent-coating additive zone and a subsequent-coating diffusion zone.

Abstract: A coated superalloy article is prepared by furnishing a nickel-base superalloy article substrate having a rhenium content of not less than about 4.0 percent by weight, and thereafter depositing an aluminum-containing coating onto a surface of the article substrate. The aluminum-containing coating includes an additive zone having an average aluminum content of not greater than about 27 percent by weight, and a diffusion zone of interdiffusion with the article substrate. A ratio of a thickness of the additive zone to a thickness of the diffusion zone is not greater than about 3:1, and is preferably about 1:1.

Abstract: A method for fabricating a turbine engine blade. The method includes providing a resistance welding system, and welding a metering plate to the turbine engine blade using the resistance welding system.

Abstract: A metering plate includes a body having a first end and a second end, at least one opening extending through the body, and at least one projection extending outwardly from the body. The body is configured to be resistance welded to at least one of a turbine engine blade and a turbine engine stator vane using the projection such that the body at least partially controls fluid flow into at least one of the turbine engine blade and the turbine engine stator vane.

Abstract: A coated nickel-base superalloy article, which is otherwise susceptible to the formation of a secondary reaction zone, is prepared by furnishing a nickel-base superalloy article substrate having thereon an initial aluminum-containing coating comprising an initial-coating additive zone and an initial-coating diffusion zone. The article is susceptible to the formation of the secondary reaction zone if heated to an elevated SRZ reaction temperature for an SRZ reaction period of time. The formation of the secondary reaction zone is avoided by first removing the initial-coating additive zone and the initial-coating diffusion zone, and thereafter depositing a subsequent aluminum-containing coating onto the article substrate. The subsequent aluminum-containing coating includes a subsequent-coating additive zone and a subsequent-coating diffusion zone.

Abstract: A coated superalloy article is prepared by furnishing a nickel-base superalloy article substrate having a rhenium content of not less than about 4.0 percent by weight, and thereafter depositing an aluminum-containing coating onto a surface of the article substrate. The aluminum-containing coating includes an additive zone having an average aluminum content of not greater than about 27 percent by weight, and a diffusion zone of interdiffusion with the article substrate. A ratio of a thickness of the additive zone to a thickness of the diffusion zone is not greater than about 3:1, and is preferably about 1:1.

Abstract: Carbide-forming elements are added to nickel-based superalloys so as to minimize grain defects, such as freckle and stray grain defects. More specifically, carbide-forming elements that form from the liquid in the mushy zone of the solidification front of single crystal (SC) and directionally solidified (DS) nickel-based superalloys are added so as to reduce the formation of freckle and stray grain defects in such alloys. A preferred nickel-based superalloy includes, by weight, between about 6.00%-9.25% tantalum, 4.75%-6.50% tungsten, at least about 2.75% rhenium, between about 5.00% to about 7.00% aluminum, at least about 0.10% hafnium and carbon in an amount sufficient (typically between about 0.10-0.15% by weight) to form carbides with other constituents to reduce significantly freckle formation in the mushy zone of the superalloy during casting.