Recent Progress in Second-Generation HTS Conductor Scale-Up at SuperPower
| Autor: | Xun Zhang, Venkat Selvamanickam, Yunfei Qiao, K. Tekletsadik, R.M. Schmidt, X. Xiong, J. Reeves, Yimin Chen, A. Rar, Yi-Yuan Xie, K. Lenseth, D.W. Hazelton |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
High-temperature superconductivity business.industry Yttrium barium copper oxide Condensed Matter Physics Critical value Electronic Optical and Magnetic Materials Conductor law.invention chemistry.chemical_compound chemistry Electromagnetic coil law Fault current limiter Optoelectronics Electrical and Electronic Engineering business Ion beam-assisted deposition Electrical conductor |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 17:3231-3234 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/tasc.2007.899360 |
| Popis: | YBa2Cu3Ox (YBCO) second-generation (2G) HTS conductors have been produced in lengths over 300 m in pilot scale facilities established at SuperPower. High throughput pilot-scale manufacturing has been demonstrated with tape speeds at or above 30 m/h of 12 mm wide tape (corresponding to 90 m/h of 4 mm wide conductor) in all steps. A 322 m long conductor with a minimum critical current value of 219 A/cm has been produced, which corresponds to a critical current x length value of 70,520 A-m. A 270 m long, 4 mm wide conductor with an end-to-end critical value of 100 A has also been demonstrated. In a campaign to manufacture 2G conductor for the Albany cable project, SuperPower has produced 12,470 m of conductor that meets or exceeds the specification for piece length (42.4 m) and critical current (100 A/cm). In fact, more than 55% of the conductor produced is at least 100 m in piece length and more than 27% greater than 200 m in piece length. In addition to scaling up 2G conductors to high-throughput pilot-scale manufacturing, we have demonstrated high critical currents in short samples produced by Metal Organic Chemical Vapor Deposition (MOCVD). Critical current values of 557 A/cm have been achieved in 2.1 micrometer thick films in 12 mm wide, 10 cm long tapes. These samples exhibit a critical current value of 116 A/cm at 1 T and 76 K, in the orientation of field parallel to the c-axis. We have also constructed a 4-pancake coil that generated a magnetic field of 1.1 T at 77 K and 2.4 T at 64 K. A Fault Current Limiter (FCL) assembly has been successfully constructed and tested at high power levels. A prospective current of 90 kA was successfully limited to 32 kA within 1 ms without any HTS element failure. |
| Databáze: | OpenAIRE |
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