W.c. Heraeus Gmbh

Heraeus Deutschland Gmbh & Co Kg

Heraeus Precious Metals Gmbh & Co. Kg

Herwig Schiefer

Heiko Specht

Jens Troetzschel

Christoph Vogt

Oliver Keitel

Christiane Leitold

Katharina Musiol

Josef Roth

Thomas Doerge

Dominik Schneider

Benjamin Koch

Egbert Stiedl

Bernd Koch

Thomas DÖRGE

One aspect relates to a method of producing a sleeve for a ring electrode for electrophysiological and neuro-medical applications from a biocompatible metallic tape. Repetitive structures are punched into the tape and each includes at least one surface that is connected by at least one fin to at least one external strip. The at least one external strip connects the repetitive structures to each other on the margin. A sleeve mold is formed from a multiple of the repetitive structures through multiple reforming steps by a reforming technique. The sleeve mold is punched off the such that the sleeve is formed with a first tube-shaped region with a larger diameter and a second tube-shaped region with a smaller diameter. The first region with the larger diameter has a larger external diameter and internal diameter than the second region with the smaller diameter, and the two regions are connected.

Processes for producing a sleeve for an electrode for medical applications

One aspect is an alloy consisting of niobium, zirconium, tantalum, and tungsten. The alloy is formed with a melt metallurgical route such that all four metals solidify as a homogeneous alloy having no inclusions more than 10 &#x3bc;m in size.

Alloy having reduced inclusions

One aspect relates to a method for producing an alloy characterized by grinding tantalum to form a tantalum powder and grinding tungsten to form a tungsten powder; mixing the tantalum powder and the tungsten powder to form a blended powder. The weight fraction of tungsten powder in the blended powder is larger than in the desired alloy. A blended body is produced from the blended powder by a powder metallurgical route. A pre-alloy is produced by a first melting of the blended body and at least a fraction of at least one further metal by a melt metallurgical route. The alloy is produced by a second melting of the pre-alloy and the remaining fraction of at least one metal by a melt metallurgical route.

Melting method for producing an inclusion-free Ta-base alloy

One aspect is a method for producing an alloy, whereby the alloy includes at least a first metal and a second metal, whereby firstly a powder metallurgical route and subsequently a melt metallurgical route is used sequentially in order to generate the alloy from the, at least, first metal and the second metal. The method includes grinding the first metal into a first metal powder, grinding the second metal into a second metal powder, mixing the first metal powder and the second metal powder to produce a blended powder, generating a blended body from the blended powder by the powder metallurgical route, and generating the alloy by melting the blended body by the melt metallurgical route.

Producing an alloy with a powder metallurgical pre-material

One aspect is a method for producing an alloy, whereby the alloy consists of a first metal, a second metal, a third metal, and a fourth metal, and the first metal, the second metal, the third metal, and the fourth metal are selected from the group consisting of the metals, niobium, zirconium, tantalum tungsten. The method includes the steps of

Use of powder-metallurgical pre-material for producing an NB alloy that is free of inclusions

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Frankfurt-am-Main, Germany

Herwig Schiefer