高临界电流密度、低损耗Cu5Ni基NbTi线材制备技术研究 |
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引用本文: | 郭强,张平祥,冯勇,刘向宏,李建峰,王瑞龙.高临界电流密度、低损耗Cu5Ni基NbTi线材制备技术研究[J].钛工业进展,2019,36(3). |
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作者姓名: | 郭强 张平祥 冯勇 刘向宏 李建峰 王瑞龙 |
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作者单位: | 西部超导材料科技股份有限公司,西部超导材料科技股份有限公司,西部超导材料科技股份有限公司,西部超导材料科技股份有限公司,西部超导材料科技股份有限公司,西部超导材料科技股份有限公司 |
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基金项目: | 陕西省国际科技合作计划项目(编号:2017KW-022)资助课题 |
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摘 要: | 重离子装置中的加速器磁体均服役在±2.25T/s的高速脉冲条件下,因此要求该种磁体所用的超导线材具有较高的临界电流和较低的损耗。针对项目需求,本文设计及制备了两种新型结构的NbTi/Cu5Ni超导线材,芯数分别为12960芯和10800芯、铜比2.0、芯丝直径均小于5 μm。系统研究了两种新型结构超导线的芯丝截面形貌、芯丝表面形貌、磁滞损耗及不同时效热处理下的临界电流密度和n值。通过优化工艺后获得了Jc(5 T、4.2 K)为2902 A/mm2,Qh(4.2 K,± 3T)为34.2 mJ/cm3 的千米级NbTi/Cu5Ni超导长线,并可实现批量化生产,为重离子装置的研制提供材料基础。
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关 键 词: | Cu5Ni基NbTi超导线材 临界电流密度 损耗 |
收稿时间: | 2019/3/29 0:00:00 |
修稿时间: | 2019/4/9 0:00:00 |
Fabrication of High Critical Current Density and Low AC loss NbTi Superconducting Wire with matrix of Cu5Ni alloy |
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Authors: | GUO Qiang ZHANG Ping-Xiang FENG Yong LIU Xiang-Hong LI Jian-Feng and Wang Rui-Long |
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Abstract: | Working with fast pulse current, low loss NbTi superconducting wires are required to reduce energy losses in High Intensity Heavy-Ion Accelerator Facility (HIAF) magnets. The new type of NbTi superconducting wires with high critical current and low loss are needed to develop. NbTi/Cu5Ni superconducting wire with filament number of 12960 and 10080 and Cu/Sc ratio of 2.0 were designed and fabricated by double stacking method. The microstructure and influence of aging heat treatment on the critical current density and break times of NbTi/Cu5Ni superconducting wire are presented in this paper. After the process optimization, NbTi/Cu0.5Mn superconducting wire with the critical current density (Jc) of 2902A/mm2 at 5T 4.2K, with the hysteresis of 34.2 J/cm3 at ± 3T was achieved in mass production. |
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Keywords: | NbTi superconducting wire critical current density AC Loss |
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