Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Leiters (2) aus einem leitenden Material, wobei ein Leiterstrang (4) im Rahmen eines Ziehprozesses durch eine Öffnung eines ersten Formwerkzeugs (6) gezogen wird, wodurch eine Umfangskontur des Leiters (2) ausgebildet wird. Vor dem ersten Formwerkzeug (6) wird auf das Material ein leitfähiges Kohlenstoffmaterial (K) aufgebracht, welches beim Durchlaufen des ersten Formwerkzeugs (6) in das Material eingearbeitet wird. Dadurch wird ein Leiter (2) mit besonders hoher Leitfähigkeit hergestellt. Weiterhin betrifft die Erfindung einen entsprechenden Leiter (2).
Abstract:
This invention relates to metal composites and to metal-alloy composites. Metal-alloy composites of this invention comprise a metal alloy and layered inorganic nanostructures or nanoparticles such as nanotubes, nanoscrolls, spherical or quasi-spherical nanoparticles, nano- platelets or combinations thereof. Methods of producing the metal composites and the metal-alloy composites are demonstrated. The layered inorganic nanostructure serves as a strengthening phase. The layered inorganic nanostructure provides reinforcement to the metal alloy.
Abstract:
A method of forming a reinforced cladding (110) on a superalloy substrate (112) is described. The method includes forming a melt pool (122) including a superalloy material (116) and a plurality of discrete carbon reinforcing structures (118) on the superalloy substrate (112) via application of energy from an energy source (120). The method further includes cooling the melt pool (122) to form a reinforced cladding (110) comprising the superalloy material (116) and the carbon reinforcing structures (118) on the substrate (112).
Abstract:
L'invention a pour objet un procédé de fabrication d'un composite (8) comprenant une matrice métallique renforcée par un renfort de carbone, caractérisé en ce que le procédé est un procédé d'extrusion en continu comprenant l'échauffement par friction d'un mélange (7) obtenu à partir d'un mélange de poudres comprenant une poudre de matrice métallique et une poudre de renfort de carbone, à l'aide d'une roue d'extrusion (2) mobile, dans un passage formé entre une gorge (2a) de la roue (2) et un élément fixe appelé sabot (3), puis l'acheminement du mélange (7) ainsi chauffé vers une filière d'extrusion (4).
Abstract:
The invention relates to a copper alloy, which has hard particles and optionally solid lubricants. The invention further relates to the use of said copper alloy for a bearing and to a bearing having said copper alloy. The invention further relates to a method for producing a bearing having a copper alloy, wherein a metal powder is produced, hard particles and optional solid lubricants are optionally added to said powder, and the powder is sintered onto a substrate. Finally, the invention relates to an alternative method for producing a bearing, wherein the copper alloy is applied to a substrate by means of casting or plating or wherein the bearing is made completely of the copper alloy.
Abstract:
Graphite aluminum composites for use in thermal management applications, such as heat sinks, are manufactured using pressure molds. The materials may be mixed previous to insertion into the mold, or can be mixed within the mold. Further, graphitic particles, such as graphitic needle coke surfaces, can be coated with the aluminum before the mold process is performed. Further, ceramic sheets can be inserted into the mixture before the mold process is performed so that the molded material can then be sliced to provide a carbon aluminum composite plate with a ceramic sheet on one of its surfaces.
Abstract:
An apparatus having a composite air-based structure with a first carbon nanotube infused material and a second carbon nanotube infused material. The first and second carbon nanotube infused materials each having a range of carbon nanotube loading selected to provide different functionalities.
Abstract:
Bei einem Verfahren zur Herstellung von Druckgussteilen aus einer Aluminiumlegierung wird die Aluminiumlegierung in einer Misch- und Knetmaschine (30) mit einem Gehäuse (31) mit einem von einem inneren Gehäusemantel (32) umschlossenen Arbeitsraum (34) und einer im inneren Gehäusemantel (32) um eine Längsachse (x) rotierenden und sich translatorisch in der Längsachse (x) hin und her bewegenden, mit Knetflügeln (38) versehenen Schneckenwelle (36), und mit am inneren Gehäusemantel (32) befestigten, in den Arbeitsraum (34) hineinragenden Knetbolzen (38) hohen Scherkräften ausgesetzt, wobei flüssige Aluminiumlegierung an einem Ende des Gehäuses (31 ) dem Arbeitsraum (34) zugeführt und am anderen Ende des Gehäuses (31) dem Arbeitsraum (34) als teilfeste Aluminiumlegierung mit einem vorgegebenen Festanteil entnommen, in eine Füllkammer (12) einer Druckgiessmaschine (10) überführt und mittels eines Kolbens (20) in eine Giessform eingestossen wird, wobei der Festanteil der Aluminiumlegierung im Arbeitsraum (34) durch gezieltes Abkühlen und Aufheizen des Arbeitsraumes (34) auf den vorgegebenen Festanteil eingestellt wird.
Abstract:
This invention relates to powder metallurgy, more specifically, to composite material production methods, and can be used for the production of copper base binders for diamond tools sued in the construction industry and stone working, including different designs of segment cutting-off abrasive wheels used for highway and runway repairs, refurbishment of metallurgical plants and nuclear power plants, renovation of bridges and other structures, as well as drills and segment cutting-off abrasive wheels for cutting of high- strength reinforced concretes. Binder affects the design of a tool. It is the binder that determines the choice of the casing material and the method of bounding the diamond layer with the case. Physical and mechanical properties of binders determine potential shapes and sizes of abrasive diamond tools. The object of this invention is to provide diamond tool binders having a higher wear resistance without an essential increase in the required sintering temperature, as well as higher hardness, strength and impact toughness. Said object is achieved by adding a copper group metal as the main binder component and an alloying addition in the form of nanopowder. The copper base diamond tool binder of the first embodiment of the invention has the following components in the following ratios, wt.%: The copper base diamond tool binder of the other embodiment of the invention has the following components in the following ratios, wt.%: Cu = 30-60 Fe= 20-35 Co=10-15 Sn= 0-10.5 WC = 0-20 alloying addition = 0.01-5. The alloying addition is introduced in the form of 75-150 m2/g specific surface area nanopowder. The copper base diamond tool binder of the other embodiment of the invention has the following components in the following ratios, wt.%: Cu = 30-60 Fe= 20-35 Co=10-15 Sn= 0-10.5 WC = 0-20 alloying addition = 0.01-5. The alloying addition is introduced in the form of 75-150 m2/g specific surface area nanopowder.