Leybold Durferrit Gmbh

Ald Vacuum Technologies Gmbh

Leybold Aktiengesellschaft

Leybold-heraeus Gmbh

Ald Vacuum Technologies Ag

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General Electric Company

Rec Scan Wafer As

Rec Silicon Inc

Franz Hugo

Erwin Wanetzky

Wilfried Goy

Albrecht Melber

Ulrich Betz

Manfred Raschke

Fernand Kuhlmann

Alok Choudhury

Matthias Blum

Alfred Henn

Thomas Ruppel

Mark Gilbert Benz

William Thomas Carter

Bruce Alan Knudsen

Robert John Zabala

Harald Scholz

Wolfgang Reuter

Georg Jarczyk

Felix Muller

Peter Busse

Michael Protzmann

Johannes Mosch

Hans-Johann Kemmer

Bernd Sitzmann

Harald Bittenbrunn

Hans-Gunter Fellmann

Wolfgang Schwarz

Hardy Weisweiler

Mathias Blum

Helmut Teuschel

Karlheinz Hock

J&uuml;rgen Preuhs

John Sheehan

Hans G Fellmann

J&ouml;rn Grossman

Robert Y Abramson

Michael Sch&auml;fer

Jakob Huber

Wilfried Schneiders

Felix Guenter Muller

Hans-Gunther Fellmann

Hans G&uuml;nther Fellmann

A method and a device for producing oriented solidified blocks made of semi-conductor material are provided. The device includes a crucible, in which melt is received, and has an insulation which surrounds the crucible at least from the top and from the side and which is arranged at a distance therefrom at least above the crucible, and at least one heating device which is arranged above the crucible. The region inside the insulation above the crucible is divided by an intermediate cover in a process chamber and a heating chamber is arranged thereabove, where at least one heating element is arranged.

Method and device for producing oriented solidified blocks made of semi-conductor material

Method and apparatus for evaporating components of multiple substance mixtures and multiple substance systems

Molds ( ) with annular mold parts ( ) divided by at least one plane of division (E&mdash;E) and forming a plurality of cavities ( ) disposed at least substantially radially to a centrifugation axis (A&mdash;A), serve for the production of precision castings by centrifugal casting, especially of parts made of materials containing titanium for internal combustion engines, the molds ( ) and a casting system being contained in a closed chamber. To automate production, at least one mold part ( ) is made to rotate in its own rotational guide, and two mold parts ( ) together with the corresponding rotational guides are brought to a closed position for the casting and solidification and to an open position for the removal of the precision castings. When cast, the precision castings are preferably joined together at their radially inward pointing ends by a circumferential ring of the solidified metal and thus a circle of castings can be removed from the opened mold by a manipulating system.

Method and apparatus for the production of precision castings by centrifugal casting

A device for directional solidification of a fused metal, for example a CoCrAlY alloy, which has been poured into a molding shell, by moving the molding shell out of a heating chamber and by immersing the molding shell in a liquid-metal bath serving as a cooling melt with a lower melting-point than the fused metal in the molding shell, for example tin. The liquid-metal bath is enclosed by several current carrying toroidal coils arranged coaxially relative to one another. For the purpose of orienting the stream filament of the agitated fused metal one or more guide plates are arranged in the space between the lateral circumferential surface of the molding shell and the inner wall of the shell containing the liquid-metal bath which is located opposite the molding shell.

Device for directional solidification of a fused metal which has been poured into a moulding shell and a process for this purpose

A bottom pour electroslag refining system refines raw material into refined liquid metal. The bottom pour electroslag refining system comprises an electroslag refining crucible; a slag; a bottom pour structure that comprises an orifice from which refined liquid metal from the electroslag refining crucible can flow as a stream of refined liquid metal; and a current path. The current path is defined in the bottom pour electroslag refining system for applying current to the raw material for melting and refining the raw material. The melted and refined raw material forms a refined liquid metal pool in the electroslag refining crucible. The current that is applied by the current path is sufficient to provide the refined liquid metal in the refined liquid metal pool with a viscosity under which the refined liquid metal can flow through the orifice under its own viscosity.

Bottom pour electroslag refining systems and methods

A sealed evacuatable crucible (1) for inductive melting of metals or other electrically conductive materials, including a plurality of palisades (2,2', . . . ) which are arranged parallel to one another, and for enclosing the melt and forming the crucible wall, and having a crucible base part (3) which carries the palisades (2,2', . . . ), and having an induction coil (18) which is wound around the palisades (2,2', . . . ) from outside in direct manner distanced therefrom, and through which there flows an alternating current and which is movable in a vertical direction relative to the crucible (1), and having in the crucible base part (3) a discharge opening (25) which is closable by means of a stopper rod (13), there is provided below the crucible base part (3) an evacuatable chamber (10) which is formed of two parts (11, 12,) for receiving a vessel (14) for collecting the molten charge, which is placed below the discharge opening (25), wherein the lower chamber part (12) rests on the transporting surface of a lift-truck (16) and is movable therefrom towards the upper chamber part (11).

Sealed evacuatable crucible for inductive melting or superheating

A casting apparatus has within a heating chamber (6) and a mold (5) which can be removed from the heating chamber into a molten quenching metal (10) disposed underneath it. As a thermal barrier between the heating chamber (6) and the quenching metal (10), a thermal insulating layer (13) floating on the molten quenching metal (10) is provided, through which the mold (5) plunges into the molten quenching metal (10).

Method for the directed solidification of molten metal and a casting

A casting apparatus has within a heating chamber (6) a mold (5) which can be moved out of the heating chamber (6) into a molten cooling metal (10) disposed beneath it. As heat insulation between the heating chamber (6) and the molten cooling metal (10) a thermal insulation layer (13) floating on the molten cooling metal is provided through which the mold (5) dips into the molten cooling metal (10). To prevent clumping within the thermal insulation layer (13) a rake or stirrer (19) is provided, which is driven by a shaker (17) and whisks or stirs the thermal insulation layer.

Method and the directional solidification of a molten metal and a

For the production of particles from castings (10) of metals from the group of the lanthanides, aluminum, boron, chromium, iron, calcium, magnesium, manganese, nickel, niobium, cobalt, titanium, vanadium, zirconium, and their alloys, which have solidified in an oriented manner, especially for the production of materials from the group of magnetic materials, hydrogen storage elements (hydride storage elements), and battery electrodes, a melt of the metal is applied in a nonreactive atmosphere to the inside of an at least essentially cylindrical cooling surface (9) according to the principle of centrifugal casting. The cylinder rotates at high speed around a rotational axis, and the melt is cooled proceeding from the outside toward the inside with an essentially radial direction of solidification. The hollow casting (10) is then reduced to particles. The melt is preferably applied to the rotating cooling surface (9) in a thickness which is no more than 10%, and preferably no more than 5%, of the diameter of the cooling surface (9), and the diameter of the cooling surface (9) is at least 200 mm, and preferably at least 500 mm.

Process and apparatus for the production of particles from castings

Metal is melted in an induction-heated crucible (13) on which a mold (10) with a downward-facing filling opening (26) is located in the melting position. After melting the metal, the crucible (13) and the mold (10) are jointly rotated about a horizontal axis (A--A) into a tilting position in which the molten material flows from the crucible (13) into the mold (10). In order to melt reactive metals, melting is done in a crucible (13) that is surrounded by a vacuum, this crucible being surrounded by an induction coil (15) outside of the vacuum. The mold (10) is located in a vacuum-sealed casting chamber (6) which is evacuated together with the crucible (13) prior to melting and casting is carried out by a joint tilting of the crucible (13), casting chamber (6) and mold (10) by at least 180 degrees while the vacuum is maintained.

Process and apparatus for melting and casting of metals in a mold

During the simultaneous casting and directional solidification of several castings in pre-heated casting moulds (11), these standing around a central cavity (H) on a ring-shaped cooling plate (5) after pouring off are continuously removed from a heating chamber (14) by a vertical movement relative to the heating chamber in accordance with the solidification temperature and the castings are cooled by heat radiation to below the solidus temperature. In order to increase the production rate and the product quality, the casting moulds (11) are moved over a firm heat sink (9) during the directional solidification by continuous relative movement of the cooling plate (5), said heat sink thereby penetrating into the cavity (H).

Process and device for simultaneous casting and directional

In a process for cleaning oil-wetted structural parts, a vacuum furnace (1) is first evacuated to a defined first pressure to eliminate residual air. Then an inert gas is introduced until a second, subatmospheric pressure is reached, which is above the first pressure, and the inert gas is circulated inside the vacuum furnace. To reduce the heat-up times and to conserve energy and inert gas:

Process for cleaning oil-wetted parts

Vertical, parallel palisades (3) are distributed around the perimeter of a circle, spaced apart by gaps, surrounding the melt. An annular plate (4) supports the palisades (3), the palisades being provided with cavities through which a coolant flows. An induction coil (20) surrounds the palisades (3) on the outside, an alternating current flowing through the coil. The plate (4) is provided with support surfaces (4a, 4b), equal in number to the number of palisades (3), their shape conforming to the base surfaces of the palisades (3). Seen in the circumferential direction, every second support surface (4a) is covered by an electrically insulating film (7). All of the palisades (3) together are surrounded by a ring (18) of electrically insulating material, which holds the palisades (3) on the plate (4).

Crucible for the inductive melting of metals

Apparatus for the cleaning, especially degreasing, of electrically conductive material (9), for example metal and/or ceramic turning chips and/or grinding sludges, under vacuum conditions, essentially consisting of a container (4) and at least two electrodes (4,5) which are connected to a power supply unit (8), the material (9) to be cleaned being heatable by the two electrodes (4,5) by direct passage of current.

Apparatus for degreasing electrically conductive material

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Aschaffenburg, Germany

Franz Hugo