August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Nb-rod-method Cu-Nb/Nb3Sn wires for practical React-and-Wind applications

Aug 28, 2017, 1:15 PM
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m F1 - Low-Tc Wires and Cables Mon-Af-Po1.08


Mr Masahiro Sugimoto (Furukawa Electric Co., Ltd.)


Nb-rod-method Cu-Nb reinforced bronze process Nb3Sn (Cu-Nb/Nb3Sn) wires are applicable to React-and-Wind processed Nb3Sn coils. The Cu-Nb composite material functions as a reinforcing stabilizer during the superconducting magnet operation. Moreover, it suppresses the damage of reacted Nb3Sn filaments due to the applied stress during manufacturing process such as the pre-bending treatment, the insulating and the winding. Plural new Cu-Nb/Nb3Sn wires with the high tin bronze (Cu-15.7wt%Sn-0.3wt%Ti) were investigated in the superconducting properties. The round wire of 0.8 mm diameter with pre-bending strain of ±0.5% demonstrated the non-Cu-Jc values (at 4.14 K, defined by 10 micro-V/m) of 1150 A/mm2 at 12 T and 410 A/mm2 at 17 T, which were 1.5 times and 1.4 times larger than those of the previous wires (with Cu-14wt%Sn-0.2wt%Ti). As for rectangular wires of 1.7 mm x 1.13 mm, the pre-bending strain was applied from the flatwise direction and/or the edgewise direction. In case of pre-bending strain of ±0.5% applying alternately from both directions, the non-Cu-Jc was 355 A/mm2 at 17 T of which was 1.6 times larger than that of the as-reacted wire without pre-bending treatments. These results suggest that the performance of large capacity conductors consist of the advanced Cu-Nb/Nb3Sn wires can be further improved by controlling both magnitude and direction of the pre-bending strain in React-and-Wind process.

Submitters Country Japan

Primary author

Mr Masahiro Sugimoto (Furukawa Electric Co., Ltd.)


Mr Kota Katayama (Furukawa Electric Co., Ltd.) Mr Akira Takagi (Furukawa Electric Co., Ltd.) Mr Hitoshi Shimizu (Furukawa Electric Co., Ltd.) Mr Hirokazu Tsubouchi (Furukawa Electric Co., Ltd.) Prof. Satoshi Awaji (Tohoku University) Dr Hidetoshi Oguro (Tokai University)

Presentation materials