Electromechanical characterization of selected superconductors

被引：19

作者：

Kopera, L. ^{[1
]}

Kovac, P. ^{[1
]}

Melisek, T. ^{[1
]}

机构：

[1] Slovak Acad Sci, Ctr Excellence CENG, Inst Elect Engn, Bratislava 84104, Slovakia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 11期

关键词：

D O I：

10.1088/0953-2048/21/11/115001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper describes the design and performance of a new tension test instrument for measuring stress-strain characteristics of a freestanding sample and critical current degradation of superconducting wires and tapes under variable tension and magnetic fields. The performance of the instrument has been tested at liquid nitrogen and liquid helium temperature up to a tensile force of 1000 N. Stress-strain and I-c-strain characteristics of advanced Bi-2223, Y-123 and MgB2 composite superconductors were measured. The results show the best electromechanical properties for the tapes mechanically reinforced by soldered stainless steel strips. MgB2 tape with a Ti-barrier and Monel sheath is less reinforced due to an apparent softening of these materials during the final annealing at 800 degrees C/30 min.

引用

页数：5

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