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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sugimoto, M. Shimizu, H. Tsubouchi, H. Okada, T. Sakai, T. Ushiyama, T. Takahata, K. Tamura, H. Mito, T. |
| Copyright Year | 2002 |
| Abstract | New process to compose a reacted Nb3Sn superconducting cable with aluminum-alloys has been developed by using friction stir welding (FSW) technique. The FSW joining process, which takes place in the solid phase below the melting point of the materials, has considerable advantages such as a high strength of welding zone and much lower distortion due to both small heat affects and reliable control of joining depth as compared with conventional welding method. In order to realize practical aluminum-alloy jacketed Nb3Sn superconductors, we have carried out elemental researches by using FSW technique. For a fabrication of aluminum-alloy jacketed Nb3Sn superconductor of a dimension 17 mmw × 4.9 mmt a Rutherford type superconducting cable having 18 reacted Nb3Sn strands of diameter 1.0 mm was assembled into a set of channel and fitting-cover made of aluminum-alloy A6061-T6 with filling material indium. Then, their joining parts were connected by using the FSW technique. The measurement on critical current (Ic) of the fabricated Nb3Sn superconductor achieved over 9.5 kA at 8 T, 4.26 K even after bending with a radius of 150 mm in a flatwise direction, which showed no degradation in comparison with Ic values multiplied by number of strands in the cable. As the results, we succeeded in developing novel type of aluminum-alloy jacketed Nb3Sn superconductors manufactured by FSW technique, which have large current capacity, sufficient allowable bending strains for a coil winding and improved contact between a cable and an aluminum-alloy jacket. The developed superconductors will be applicable to react-and-wind superconducting magnets having very large current at high magnetic field such as nuclear fusion reactors and detectors for high energy physics of the next generation. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 4802905 |
| Ending Page | 4802905 |
| Page Count | 1 |
| File Size | 799393 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 22 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Conductors Niobium-tin Welding Cable shielding Integrated circuits Heating ${\rm Nb}_{3}{\rm Sn}$ superconductor Aluminum-alloy jacket critical current friction stir welding |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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