Abstract:
The present invention provides for assemblies comprising metal matrix composite bars where the bars only intermittently have mutual contact. Minimally two bars of metal matrix composite are joined, for example, by lap joints, or by the use of incorporated tabs and slots or over-lapping slots, at areas of mutual contact to form the assemblies. The metal matrix composite assemblies of the present invention may be readily assembled to provide structures, supports, or sub-assemblies, and the like, that may exhibit high strength and stiffness coupled with relatively low mass. Additionally, such assemblies may withstand exposure to elevated temperatures higher than can be tolerated by polymeric composites. Such assemblies are expected to be particularly suitable for lightweight, stiff support structures for space booms, satellite structures, mirror backings, solar panel supports, wall reinforcement, and the like.
Abstract:
Disclosed are methods and materials for preparing metal matrix composite (MMC) components that have low weight, good thermal conductivity and a controllable in-plane coefficient of thermal expansion. One embodiment of the invention features a metal matrix composite that includes a metal alloy and random in-plane discontinuous fibers. In some embodiments, the metal alloy includes aluminum, copper or magnesium. In certain embodiments, the metal matrix composite includes additives that enable solution hardening. In other embodiments, the metal matrix composite includes additives that enable precipitation hardening. Another embodiment of the invention features a method of manufacturing a metal matrix composite. The method includes contacting random in-plane discontinuous fibers with a binder, and pressurizing the random in-plane discontinuous fibers and the binder to form a bound preform. The preform is pressurized to a pressure greater than the molten metal capillary breakthrough pressure of the bound preform. Subsequently, the bound preform is placed in a mold, infiltrated with a molten infiltrant, and the molten toform infiltrant is cooled the metal matrix composite.
Abstract:
In order to improve a device for the production of semifinished goods and moulded parts made of a metal material with the aid of an extruder for the production of a metal flow and using downstream devices for shaping semifinished goods and unfinished goods in a structural and functional manner whereby continuously reproducible qualities of components can be obtained, the extruder comprises a worm system that consists of one or two meshed worms.
Abstract:
A method is disclosed for forming extrudate filament, which consist essentially of fiber, organic binder, and metal and /or ceramic. The extrudate filament can be spooled, or used to form preforms, and/or assemblages of preforms. In further methods, the extrudate filament and/or preforms can be used to fabricate fiber-reinforced metal-matrix or ceramic-matrix or metal and ceramic matrix composite parts, which consist essentially of fiber in a matrix of metal, or ceramic, or metal and ceramic, respectively.
Abstract:
A turbomachine component and method for fabricating the turbomachine component are provided. The turbomachine component may include a matrix material and carbon nanotubes combined with the matrix material. The matrix material may include a metal or a polymer. The carbon nanotubes may be contacted with the metal to form a metal-based carbon nanotube composite, and the metal-based carbon nanotube composite may be processed to fabricate the turbomachine component.
Abstract:
The present invention generally relates to magnesium based alloys, and in particular, to magnesium based alloys containing tin and lead, and processes for the preparation and applications of the magnesium based alloys. The magnesium based alloys of the present invention have been shown to provide good mechanical forming properties at room temperature and may also include one or more additional elements of zinc, aluminium, zirconium, manganese, strontium, calcium, bismuth, antimony, boron, silicon, copper, silver and rare earth elements.
Abstract:
Es wird ein Turbinenbauteil (120) aus einem metallischen Basismaterial (1) und im Basismaterial (1) verteilten Partikeln (5) aus einem Partikelmaterial zur Verfügung gestellt. Das Partikelmaterial weist eine höhere Affinität zu Sauerstoff auf, als das Basismaterial.
Abstract:
Metal-cladded metal matrix composite wires that include a hot worked metal cladding associated with the exterior surface of a metal matrix composite wire comprising a plurality of continuous, longitudinally positioned fibers in a metal matrix.
Abstract:
Gliding board devices and methods of making gliding board devices wherein at least a portion of the devices is formed of a bulk amorphous alloy material are provided. The gliding board device including an upper reinforcing element that covers at least the upper surface of the device; a lower reinforcing element; a sliding element; a pair of running edges; and a core of filler material disposed between the upper and lower element, wherein at least one of the upper reinforcing element, lower reinforcing element and pair of running edges are formed from an amorphous alloy.