拉伸应变对Bi-2223银及银合金包套带材临界电流的影响

稀有金属材料与工程, 2006, 35(11): 1691-1694.

拉伸应变对Bi-2223银及银合金包套带材临界电流的影响

李成山 ^1, , 吕朝阳 ^2, , 郝清滨 ^3, , 郑会玲 ^4, , 张平祥 ^5,

1.西北有色金属研究院,陕西,西安,710016

2.东北大学,辽宁,沈阳,110006

3.西北有色金属研究院,陕西,西安,710016

4.西北有色金属研究院,陕西,西安,710016

5.西北有色金属研究院,陕西,西安,710016

关键词： Bi-2223带材 , 不可逆拉伸应变 , 包套材料 , 芯丝数目 , Ag/超比例

Tensile Strain Effects on Critical Current of Ag and Ag Alloy-Sheathed Bi-2223 Superconducting Tapes

研究了Bi-2223带材的应力-应变特征,比较了包套材料、芯丝数目和Ag/超比例对Bi-2223带材不可逆拉伸应变的影响.实验发现,采用高强度的AgMn合金包套材料可提高芯丝的残余压应变,并通过提高Ag/超界面的平整性,减少因为界面不均匀而产生的应力集中,芯丝中微裂纹的出现和扩展将被延迟到更高的应变状态,因此可显著提高带材的不可逆拉应变.同时,通过增加芯丝数量和Ag/超比例也可增强带材抗拉伸应变能力.

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拉伸应变对Bi-2223银及银合金包套带材临界电流的影响

Tensile Strain Effects on Critical Current of Ag and Ag Alloy-Sheathed Bi-2223 Superconducting Tapes

参考文献