✦ LIBER ✦

Bronze-processed Nb3Sn with addition of germanium to matrix

✍ Scribed by K Tachikawa; M Terada; M Endo; Y Miyamoto

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 359 KB
Volume: 33
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(93)90137-d

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✦ Synopsis

The effects of addition of Ge to the matrix of bronze-processed Nb3Sn on the structure and superconducting properties have been studied. The simultaneous addition of Ta, Hf and Ti to the Nb core has also been carried out. The critical current density, Jc, of Nb3Sn was appreciably increased by the addition of Ge. The simultaneous addition of 0.5 at% Ge to the matrix and 1 at% Ta to the core enhances the Jc of Nb3Sn at 12 T by one order of magnitude. This increase in the Jc of Nb3Sn seems to be attributed to the grain refinement of Nb3Sn by the addition of Ge. The formation of a thin layer richer in Ge is observed in the matrix adjacent to the Nb3Sn layer, which may be effective in reducing the proximity effect between Nb3Sn filaments in cases of a.c. use.

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