| Magnetization study of ITER-type internal-Sn Nb3Sn superconducting wire |
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| 作者姓名： | 张超武 周廉 AndreSulpice Jean-LouisSoubeyroux ChristopheVerwaerde GiaKyHoang 张平祥 卢亚峰 唐先德 |
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| 作者单位： | Shaanxi University of Science and Technology, Xi'an 710021, China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;Shaanxi University of Science and Technology, Xi'an 710021, China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;CNRS/CRETA, BP 166, 38042 Grenoble, France;CNRS/CRETA, BP 166, 38042 Grenoble, France;ALSTOM, 3 bis, avenue des 3 Chenes, 90018 Belfort, France;ALSTOM, 3 bis, avenue des 3 Chenes, 90018 Belfort, France;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China |
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| 基金项目： | Project supported by the
State Key Development Program for Basic Research of China (Grant
No~2005CB724004) and the France-China Collaboration Research Contract: CNRS
No~722441. |
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| 摘 要： | Through magnetization measurement with a SQUID magnetometer the heat treatment optimization of an international thermonuclear experimental reactor （ITER）-type internal-Sn Nb3Sn superconducting wire has been investigated. The irreversibility temperature T^＊ （H）, which is mainly dependent on A15 phase composition, was obtained by a warming and cooling cycle at a fixed field. The hysteresis width △M（H） which reflects the flux pinning situation of the A15 phase is determined by the sweeping of magnetic field at a constant temperature. The results obtained from differently heat-treated samples show that the combination of T^＊ （H） with AM（H） measurement is very effective for optimizing the heat reaction process. The heat treatment condition of the ITER-type wire is optimized at 675℃/128 h, which results in a composition closer to stoichiometric Nb3Sn and a state with best flux pinning.
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| 关 键 词： | 超导线 Nb3Sn 磁化测量 磁滞现象 |
| 收稿时间： | 2006-07-24 |
| 修稿时间： | 2006-07-242007-03-12 |
Magnetization study of ITER-type internal-Sn Nb3Sn superconducting wire |
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| Zhang Chao-Wu,Zhou Lian,Andre Sulpice,Jean-Louis Soubeyroux,Christophe Verwaerde,Gia Ky Hoang,Zhang Ping-Xiang,Lu Ya-Feng and Tang Xian-De.Magnetization study of ITER-type internal-Sn Nb3Sn superconducting wire[J].Chinese Physics B,2007,16(6):1764-1769. |
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| Authors: | Zhang Chao-Wu Zhou Lian Andre Sulpice Jean-Louis Soubeyroux Christophe Verwaerde Gia Ky Hoang Zhang Ping-Xiang Lu Ya-Feng and Tang Xian-De |
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| Institution: | ALSTOM, 3 bis, avenue des 3 Chenes, 90018 Belfort, France
; CNRS/CRETA, BP 166, 38042 Grenoble, France
; Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China
; Shaanxi University of Science and Technology, Xi'an 710021, China;Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China |
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| Abstract: | Through magnetization measurement with a SQUID magnetometer the heat
treatment optimization of an international thermonuclear experimental
reactor (ITER)-type internal-Sn Nb$_{3}$Sn superconducting wire has been
investigated. The irreversibility temperature $T^*(H)$, which is mainly
dependent on A15 phase composition, was obtained by a warming and cooling
cycle at a fixed field. The hysteresis width $\Delta M(H)$ which reflects
the flux pinning situation of the A15 phase is determined by the sweeping
of magnetic field at a constant temperature. The results obtained from
differently heat-treated samples show that the combination of $T^*(H)$ with
$\Delta M(H)$ measurement is very effective for optimizing the heat reaction
process. The heat treatment condition of the ITER-type wire is optimized at
675$\,^\circ$C/128~h, which results in a composition closer to stoichiometric
Nb$_{3}$Sn and a state with best flux pinning. |
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| Keywords: | Nb3Sn superconducting wire internal-Sn process irreversibility temperature hysteresis width |
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