W.c. Heraeus Gmbh & Co Kg

Wulf Kock

David Francis Lupton

Harald Manhardt

Matthias Frericks

Friedhold Scholz

G&uuml;nter Herklotz

Frank Kr&uuml;ger

Michael Koch

Jens Tr&ouml;tzschel

J&uuml;rgen Merker

Franz Braun

A gold-free platinum material that is dispersion-strengthened by small, finely dispersed particles of base metal oxide. The base metal is either 0.01-0.5 wt. % Sc or a mixture/alloy of Sc and at least one metal from the group consisting of Zr, Y, and Ce with a total base metal content of 0.05-0.5 wt. %.

Gold-free platinum material dispersion-strengthened by small, finely dispersed particles of base metal oxide

A radially expandable support structure is presented, for keeping open lumina within a body, in particular a blood vessel, having a tube-shaped structure that has at least two partial structures, with a wall surface that extends between a first and a second end, which has several cut out areas, in particular, slits, which are essentially oriented parallel to the longitudinal axis of the tube-shaped structure. At least one of the partial structures ( ) extend without interruption in the axial direction generally from the first end to the second end of the tube-shaped structure. A first partial structure ( ) can be expanded at least in the radial direction and has at least one radial-expansion component. The individual radial expansion components ( ) are arranged as a helix or in a helix shape. A second partial structure ( ) is generally almost rigid in the axial direction. The two partial structures ( ) are arranged in such a way that during the radial expansion of the tube-shaped structure, the second partial structure ( ) receives the longitudinal axial forces that arise.

Radially expandable stent IV

A process for producing a coating on a refractory structural member, in which a noble metal alloy is applied as a coating material to the refractory structural member. The noble metal alloy contains, among other constituents, an oxidizable substance, which includes boron and/or phosphorus and/or antimony and/or arsenic. The refractory structural member and the coating are heated at least once in an oxygen-containing atmosphere to a temperature T that is greater than or equal to the liquidus temperature T of the noble metal alloy. The oxidizable substance is oxidized during this heating process, and the oxide that has formed is at least partially vaporized. The temperature T is maintained until the proportion of oxidizable substance in the coating is <0.1 atomic percent, and the coated refractory structural member is then cooled.

Process for producing a coating on a refractory structural member

A method is provided for manufacturing a welded shaped body of platinum material dispersion-hardened by finely divided small particles of base metal oxide, especially such a body provided with at least one inside wall, such as a tube. The base metal oxide is one or more oxides of the elements yttrium, zirconium and cerium. The method includes shaping and welding of at least one part, especially a sheet, of an alloy of platinum and base metal, to a preform body, e.g. a tube. The preform body is then subjected to heat treatment in an oxidizing medium until the minimum degree of oxidation of the base metal reaches 75 wt %. The preform body is then formed into the desired product.

Method for manufacturing a welded shaped body dispersion-hardened

A process for making iron, cobalt and/or nickel base alloys containing rhenium. The process involves melting together the components that form the alloys, at least one of the components being a rhenium master alloy having 30 to 70 wt % rhenium, then casting the resultant melt and allowing the melt to solidify. Possible difficulties such as the formation of rhenium heptoxide are avoided by using a master alloy containing (i) rhenium and (ii) iron, cobalt and/or nickel, instead of sintered rhenium as the rhenium source during the melting step.

Growing community of inventors

Alzenau, Germany

Wulf Kock