Mechanical Properties of (Bi,Pb)-2223 Multifilament Tapes with Ag-Alloy Sheath
LIANG Ting1,2, QU Ti-Ming1, LI Pei1, HAN Zheng-He1
1Applied Superconductivity Research Center, Tsinghua University, Beijing 100084
2Institute of Chemical Defense of the Chinese People’s Liberation Army, Beijing 102205
Mechanical Properties of (Bi,Pb)-2223 Multifilament Tapes with Ag-Alloy Sheath
LIANG Ting1,2;QU Ti-Ming1;LI Pei1;HAN Zheng-He1
1Applied Superconductivity Research Center, Tsinghua University, Beijing 100084
2Institute of Chemical Defense of the Chinese People’s Liberation Army, Beijing 102205
Abstract： Ag-Mg-V alloy is prepared and investigated to develop a new sheath alloy used for BSCCO tapes. Bi-2223 Ag/AgMgV and Bi-2223 AgMgV/AgMgV tapes are studied with the help of stress-strain measurement, optical microstructure and critical current Ic. The value of Ic at 77K and at magnetic field B=0 is obtained to be 90A/cm2 for the samples of Bi-2223 Ag/AgMgV tapes, which is higher than that of Bi-2223 AgMgV/AgMgV tapes (72A/cm2). The resistance of AgMgV alloy, up to 0.37μΩ.cm at 77K, is higher than that of pure Ag (0.28μOmega.cm) after annealed at 840°C for 40h, which is studied for reducing the ac loss. The values of the fracture strength and the maximum strain are 86MPa and 0.50% for Bi-2223 Ag/AgMgV tapes and 108MPa and 0.33% for Bi-2223 AgMgV/AgMgV tapes, respectively.
2006, Vol. 23 
