摘要
The effects of axial strains εa on the critical current of Bi-2223/Ag and Bi-2223/AgMn tapes produced by the powder-in-tube method have been studied at 77 K. The normalized critical current Icn vs axial strain εa curves Icn(εa), and its empirical formulae as Icn=1-(εa/a)b, where a and b are constants, have been obtained. The critical current degrades more rapidly under large axial tensile strains than under axial compressive strain. The irreversible strain limit of 19-filament, 37-filament Bi-2223/Ag and 61-filament Bi-2223/AgMn superconducting tapes are 0.23-51%, 0.30-36% and 0.43-0.54%, respectively. Strain rate has influence on the irreversible strain limit. The whole Icn(εa) curve is divided into four ranges: Compressive strain regime, first tensile strain regime, second tensile strain regime, third tensile strain regime.
| 源语言 | 英语 |
|---|---|
| 页(从-至) | 158-161 |
| 页数 | 4 |
| 期刊 | Physica C: Superconductivity and its Applications |
| 卷 | 386 |
| DOI | |
| 出版状态 | 已出版 - 15 4月 2003 |
| 已对外发布 | 是 |
| 活动 | ICMC 2002 - Xi an, 中国 期限: 16 6月 2002 → 20 6月 2002 |
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