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《Cryogenics》 2006-01
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Mechanical properties of Bi-2223 high temperature superconducting tapes

Wang Zhengdao~1 Wang Wenquan~2(~1School of Civil Engineering and Architecture,Beijing JiaoTong University,Beijing 100044,China)(~2Beijing General Research Institute for Non-Ferrous Metals,Superconducting Center,Beijing 100088,China)  
The mechanical properties of four types of Bi-based 2223 high temperature superconducting(HTS) tapes were studied at 77 K.The result shows that the mechanical property of tapes could be partly improved by using suitable alloy-sheaths instead of Ag-sheath tape,but the electrical property will decrease in reverse,especially for the tape with alloy inner-sheath and Ag outer-sheath.By the XRD pattern,it demonstrates that the content of 2223 phase will decrease when using alloy-sheath instead of Ag-sheath,especially using alloy for inner-sheath and Ag for outer-sheath.The experimental results also demonstrate that n-value is more sensitive to the damage of tapes than the critical current density.Finally,the synchrotron radiation technique is taken to study the damaging process of Bi-system 2223/Ag tapes under tensile stress at room temperature and 77 K.
【Fund】: 国家自然科学基金(10502005)资助项目
【CateGory Index】: TM26
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