W.c. Heraeus Gmbh

W.c. Heraeus Gmbh & Co Kg

Michael Koch

David Francis Lupton

Harald Manhardt

Wulf Kock

Friedhold Scholz

Reinhold Weiland

Tobias Mueller

Bernd Fischer

An iridium alloy is produced having at least 85% by weight iridium, at least 0.005% by weight molybdenum, 0.001 to 0.6% by weight hafnium and, optionally, rhenium, the sum of molybdenum and hafnium being between 0.002 and 1.2% by weight. The iridium alloy is produced in a process, in which an IrMo and an IrHf master alloy, respectively, are created in an electric arc and immersed into an iridium melt, optionally together with Re.

Doped iridium with improved high-temperature properties

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.

Process for making rhenium-containing alloys

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Bruchkoebel, Germany

Michael Koch