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Preprint
Report number CERN-ATS-2010-005
Title Phase Transformations during the Reaction Heat Treatment
Author(s) Scheuerlein, C (CERN) ; Di Michiel, M (ESRF, Grenoble) ; Thilly, L (Poitiers U.) ; Buta, F (Geneva U.) ; Peng, X (Hyper Tech Research Inc., Columbus) ; Gregory, E (Supergenics LLC I, Jefferson) ; Parrell, J A (Oxford Supercond. Tech., Carteret) ; Pong, I (CERN) ; Bordini, B (CERN) ; Cantoni, M (EPFL, Lausanne)
Publication 2009
Imprint 13 Nov 2009
Number of pages 7
Presented at 9th European Conference on Applied Superconductivity, Dresden, Germany, 13 - 17 Sep 2009
Subject category Accelerators and Storage Rings
Abstract The evolution of Nb containing phases during the diffusion heat treatment of three different high critical current Nb3Sn strand types is compared, based on synchrotron X-ray diffraction results that have been obtained at the ID15 beam line of the European Synchrotron Radiation Facility (ESRF). In all strands studied, Nb3Sn formation is preceded by the formation of a Cu-Nb-Sn ternary phase, NbSn2 and Nb6Sn5. As compared to the PIT and Tube Type strand, the amount of these phases formed in the RRP strand is relatively small. In the RRP strand subelements with a fine filament structure Nb3Sn grows more quickly, thereby preventing to a large extent the formation of the other higher tin phases.
Submitted by evelyne.delucinge@cern.ch

 


 Journalen skapades 2010-01-25, och modifierades senast 2018-04-27


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