Strain effect in MgB2/stainless steel superconducting tape

被引：46

作者：

Kitaguchi, H ^{[1
]}

Kumakura, H ^{[1
]}

Togano, K ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICA C | 2001年 / 363卷 / 03期

关键词：

MgB2; strain effect; critical current;

D O I：

10.1016/S0921-4534(01)00960-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of mechanical strain on the critical current (I.) is investigated for magnesium diboride (MgB2)/stainless steel (SUS316) superconducting tapes. The tapes are fabricated by using "powder in tube" method and deformation process without any heat treatment. The tensile axial strain along tape length is successfully induced to the sample by using a U-shape holder made of stainless steel (SUS304). Two samples are examined at 4.2 K in 5 T (B is applied perpendicular to the tape surface). While the initial I-c at zero external strain state (I-c0) varies (30.4 and 33.3 A), normalized I-c (I-c/I-c0) vs. external strain relations fall on the same curve. Linear increase of I-c is observed from zero external strain state to 0.4% strain (107% of I-c0). Rapid and large degradation occurs at the strain exceeding 0.4-0.5%. High durability against stress can be expected for MgB2/stainless steel superconducting tapes. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：198 / 201

页数：4

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