Progress on Internal-Tin Route Nb3Sn Superconducting Strand for ITER in China

摘要：

　　Multi-filamentary Nb3Sn strand for ITER has been successfully fabricated by a conventional internal-tin (IT) route at Western Superconducting Technologies,Co.Ltd.All the performances of the IT Nb3Sn strand is able tomeet the ITER specifications.In 2010,one hundred kilograms of IT Nb3Sn strand has been cabled,jacketed and integrated into conductor sample titled with TFCN2 by ASIPP in China and tested in CRPP,Switzerland.After 1200 cycles warm-up and cooling down,Tcs of the TFCN2 Sultan sample at 10.78 T,4.5 K are 6.35 K for the left leg and 6.37 K for the right leg,respectively,which is larger than the ITER lower limit of 5.7 K.This is the first successful Sultan sample made of Chinese Nb3Sn strand.In 2011,the influence of applied axial strain on critical current (Ic) was investigated using TFCN2 strand in the University of Twente,the Netherland.The irreversible degradation of Ic starts around +0.23% tensile intrinsic strain.The heat treatment influence of the duration at 650 oC on microstructure and performance was also studied.It was found that the fraction of un-reacted Nb after heat treatment is dependent on the position in the cross section.The hysteresis loss increases much faster than Ic when the duration at 650 ℃ increased.

关键词： Nb3Sn strands Heat treatment Microstructure Critical current Hysteresis loss

作者: Jianwei Liu Ke Zhang JianFeng Li Sheng Liu Xiande Tang Shejun Du Xianghong Liu Yong Feng Pingxiang Zhang

作者单位: Western Superconductor Technologies Co. Ltd, No. 12, Mingguang Road, Xi’an 710018, China;State Engin China International Nuclear Fusion Energy Program Execution Center, No. 15, Fuxing Yi Road,Beijing 1 Western Superconductor Technologies Co. Ltd, No. 12, Mingguang Road, Xi’an 710018, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 158-162

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）