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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Banno, N. Takeuchi, T. Kikuchi, A. Iijima, Y. Inoue, K. Kosuge, M. Yuyama, M. Wada, H. |
| Copyright Year | 2002 |
| Abstract | Nb/sub 3/(Al, Ge) conductors were prepared with a diffusion reaction process at a temperature around 1400/spl deg/C, from multifilamentary Nb/Al-25at%Ge precursors. Critical current densities of 300 A/mm/sup 2/ at 21 T and 220 A/mm/sup 2/ at 23 T at 4.2 K have been obtained after a diffusion reaction at 1400/spl deg/C for 7 h followed by 10 h/800/spl deg/C heat treatment. The H/sub c2/ in excess of 28.5 T is about 2 T larger than that of the so-called RHQT Nb/sub 3/Al. Large Al-Ge filament size in the precursors over a few microns might be acceptable to improve high-field J/sub c/ performance, significantly reducing fabrication difficulty of the Nb/Al-Ge precursors. Small matrix ratio of 0.8 and piece-length of 30 m was achievable in the precursor preparation at our laboratory workshop without intermediate annealing. In addition, the current capacity up to values higher than 300 A at 21 T, 4.2 K has been given by an enlarged cross-section sample. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 967 |
| Ending Page | 970 |
| Page Count | 4 |
| File Size | 259253 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 14 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-06-01 |
| 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 Diffusion processes Fabrication Multifilamentary superconductors Superconducting magnets Critical current density Heat treatment Nuclear magnetic resonance Superconductivity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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