Granted Patent
B2
US 8,613,788 · App. 12/824,398 · Granted Dec 24, 2013
Increasing the strength of iridium, rhodium, and alloys thereof
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Abstract
The addition of 0.5 to 30 ppm boron and 0.5 to 20 ppm calcium to iridium and the Zr- and Hf-free alloys thereof and rhodium and the Zr- and Hf-free alloys thereof surprisingly increases the creep rupture strength at high temperatures, in particular around 1,800° C.
Claims (1)
1. A method for increasing creep rupture strength of iridium metal, the method comprising adding 0.5 to 30 ppm boron and 0.5 to 20 ppm calcium by weight to pure iridium metal to produce doped iridium, wherein the doped iridium consists of iridium, calcium, and boron, and wherein the creep rupture strength of the doped iridium is 20 to 30% higher than that of the pure iridium metal.
Assignments (3)
CHANGE OF NAME
Recorded May 19, 2015
From: HERAEUS MATERIALS TECHNOLOGY GMBH & CO. KG
To: HERAEUS DEUTSCHLAND GMBH & CO. KG
Reel/Frame 035744/0381 →
CHANGE OF NAME
Recorded Mar 8, 2012
From: W.C. HERAEUS GMBH
To: HERAEUS MATERIALS TECHNOLOGY GMBH & CO. KG
Reel/Frame 027830/0077 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Sep 7, 2010
From: HORTIG, UWE; BAIER, VERENA; MANHARDT, HARALD; WARKENTIN, OLIVER; LUPTON, DAVID FRANCIS
To: W.C. HERAEUS GMBH
Reel/Frame 024941/0911 →