| 力学性能对Bi-2223/Ag超导带材临界电流影响实验研究 |
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| 引用本文： | 宋春梅,吴云龙,刘华军,教晓东,王正道,熊玉峰,李来风.力学性能对Bi-2223/Ag超导带材临界电流影响实验研究[J].低温物理学报,2006,28(1):82-85. |
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| 作者姓名： | 宋春梅 吴云龙 刘华军 教晓东 王正道 熊玉峰 李来风 |
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| 作者单位： | 中国科学院理化技术研究所,北京,100080;遵义师范学院物理系,遵义,563002;中国科学院理化技术研究所,北京,100080;中国科学院研究生院,北京,100039;中国科学院理化技术研究所,北京,100080;北京工业大学,北京,100022;中国科学院理化技术研究所,北京,100080;中国国家纳米科学中心,北京,100080;中国科学院理化技术研究所,北京,100080 |
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| 摘 要： | 本文主要研究了在77K温度下,拉伸应变和弯曲应变对Bi-2223/Ag超导带材临界电流的影响,得到了超导带材的临界电流随拉伸强度、曲率半径变化规律.实验结果显明,拉伸作用在超导带材上产生的形变对其临界电流(Ic)的影响存在一个临界值εirr=0.3%.形变小于此临界值,Ic变化较小,超过此临界值,临界电流急剧下降.弯曲实验同样存在类似关系.同步辐射光源对超导带材检测表明,在形变情况下,超导氧化物陶瓷芯的微裂纹迅速增加和交织是Ic降低的主要原因.
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| 关 键 词： | 超导带材 拉伸应变 弯曲应变 临界电流 |
| 收稿时间： | 10 15 2004 12:00AM |
| 修稿时间： | 11 4 2004 12:00AM |
STUDY ON THE EFFECTS OF MECHANICAL PROPERTIES ON CRITICAL CURRENT OF Bi-2223/Ag TAPES |
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| Song CHun-Mei,Wu Yun-Long,Liu Hua-Jun,Jiao Xiao-Dong,Wang Zheng-Dao,Xiong Yu-Feng,Li Lai-Feng.STUDY ON THE EFFECTS OF MECHANICAL PROPERTIES ON CRITICAL CURRENT OF Bi-2223/Ag TAPES[J].Chinese Journal of Low Temperature Physics,2006,28(1):82-85. |
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| Authors: | Song CHun-Mei Wu Yun-Long Liu Hua-Jun Jiao Xiao-Dong Wang Zheng-Dao Xiong Yu-Feng Li Lai-Feng |
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| Institution: | 1 Technical Institute of Physics and Chemistry,Beijing 100080;2 Department of physics, Zuayi Normal College, Zun Yi 563002; 3 Graduate college, Chinese Academy of Sciences, Beijing 10039 ;4 Institute of Mechanics, Beijing Industry University, Beijing 100080 ;5National center for nanoscience and technology, Beijing 100080 |
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| Abstract: | Effects of mechanical properties on the critical current of Bi-2223/Ag tapes have been studied at 77K. There is a critical value. The conductors critical current (I_ c ) keeps nearly constant when the tensile strain is low than the critical value. As tensile strain increase, I_ c decreases slowly at the beginning, and then degrades sharply near 0.3% of strain. Degradations of I_ c caused by the bending strain are in good agreement with the tensile testing results. Synchrotron radiation shows that the degradation of I_ c is related directly with propagation of micro-crack in the oxide layer under tensile tests. |
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| Keywords: | Superconductive tapes tensile strain bending strain critical current |
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