Material mechanics study on rare-earth based high-Tc superconductors aiming high-field magnet application

面向高场磁体应用的稀土基高温超导体材料力学研究

• 批准号: 21686064
• 负责人: NISHIJIMA Gen
• 金额: $ 7.24万
• 依托单位: National Institute for Materials Science (2010-2011)Tohoku University (2009)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21686064/
• 关键词: 複合変形応力; 高温超伝導線材; 希土類系; 強磁場; 臨界電流; 歪依存性; 温度依存性; 希土類系高温超伝導線材; 極低温; 歪; 材料力学; 電磁機械特性

To develop higher field superconducting magnets, application of high-T_c superconductor is necessary. In particular, rare-earth based superconductors, which are usually deposited on a high-strength metal substrate, are important candidates for high-field magnet material. In this work, an apparatus, which applies tensile/compressive strain to high-T_c superconductor, was developed. The apparatus was designed based on a four-point bending test. The author investigated strain dependence of critical current at various temperatures and magnetic fields for commercially available superconductor using the apparatus with a variable temperature insert and a cryogen-free superconducting magnet. Temperature and magnetic field are important parameter to determine the strain dependence of critical current for the rare-earth based high-Tc superconductor. A scaling law is needed to develop application devices.

为了开发更高磁场的超导磁体，高温超导材料的应用是必要的。特别是，通常沉积在高强度金属基底上的稀土基超导体是高场磁体材料的重要候选者。在这项工作中，开发了一种对高温超导体施加拉伸/压缩应变的装置。该装置是根据四点弯曲试验设计的。作者使用具有可变温度插入件和无制冷剂超导磁体的设备研究了商用超导体在不同温度和磁场下临界电流的应变依赖性。温度和磁场是确定稀土基高温超导体临界电流应变依赖性的重要参数。开发应用设备需要缩放定律。

项目成果

Development of pre-bent high-strength Nb_3Sn cable with stainless-steel reinforcement strands

不锈钢加强绞线预弯高强度Nb_3Sn电缆的研制

• 发表时间: 2009
• 作者: G.Nishijima; et al.
• 通讯作者: et al.

Transport and mechanical property evaluation for Cu stabilized PLD-GdBa_2Cu_3O_y coated conductor

Cu稳定PLD-GdBa_2Cu_3O_y涂层导体的传输和机械性能评估

• 发表时间: 2011
• 作者: G. Nishijima; 他
• 通讯作者: 他

低温工学・超伝導工学における国際情勢と動向について-ASC :高温超伝導材料-

国际低温工程与超导工程现状与趋势-ASC：高温超导材料-

• 发表时间: 2010
• 作者: 西島元; 他
• 通讯作者: 他

Hoop stress test of GdBa_2Cu_3O_y coated conductor

GdBa_2Cu_3O_y涂层导体环向应力测试

• 发表时间: 2010
• 作者: Gen Nishijima

Mechanical and transport characteristic exploration for coated conductors by hoop stress tests

通过环向应力测试探索涂层导体的机械和传输特性

• 发表时间: 2011
• 影响因子: 1.7
• 作者: G. Nishijima; S. Awaji; K. Watanabe; K. Shikimachi; N. Hirano; S. Nagaya; A. Ibi; T. Izumi;Y. Shiohara
• 通讯作者: Y. Shiohara