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Title: The Influence of Dispersedly Distributed Cracks on Critical Current of the Nb{sub 3}Sn Strand

Abstract

The Nb{sub 3}Sn strand is the presently most widely used high field superconductor. However, one important fact is that the transport properties of an Nb{sub 3}Sn strand will degrade obviously when it is subjected to high mechanical loads. Based on the dispersed distribution of cracks in the bronze strand due to a high axial tensile strain, we propose an analytical strand model to describe the influence of cracks on the critical current of the Nb{sub 3}Sn strand. The dependence of the critical current I{sub c} of the strand on crack density is investigated theoretically. It is shown that the calculation results by this model agree with the experimental data. The influence of filament-to-matrix resistance r{sub c} on transport degradation is also discussed since r{sub c} is a key parameter for the total voltage calculation and its realistic value is of great importance for accurate results. We also compared the influence of dispersed and collective cracks on transport properties with specific conditions.

Authors:
; ;  [1]
  1. Hohai University, College of Mechanics and Materials (China)
Publication Date:
OSTI Identifier:
22771306
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 5; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BRONZE; CRACKS; CRITICAL CURRENT; ELECTRIC POTENTIAL; EXPERIMENTAL DATA; FILAMENTS; NIOBIUM COMPOUNDS; STRAINS; SUPERCONDUCTORS

Citation Formats

Liu, Yu, Xue, Feng, and Gou, Xiao-Fan. The Influence of Dispersedly Distributed Cracks on Critical Current of the Nb{sub 3}Sn Strand. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4362-4.
Liu, Yu, Xue, Feng, & Gou, Xiao-Fan. The Influence of Dispersedly Distributed Cracks on Critical Current of the Nb{sub 3}Sn Strand. United States. doi:10.1007/S10948-017-4362-4.
Liu, Yu, Xue, Feng, and Gou, Xiao-Fan. Tue . "The Influence of Dispersedly Distributed Cracks on Critical Current of the Nb{sub 3}Sn Strand". United States. doi:10.1007/S10948-017-4362-4.
@article{osti_22771306,
title = {The Influence of Dispersedly Distributed Cracks on Critical Current of the Nb{sub 3}Sn Strand},
author = {Liu, Yu and Xue, Feng and Gou, Xiao-Fan},
abstractNote = {The Nb{sub 3}Sn strand is the presently most widely used high field superconductor. However, one important fact is that the transport properties of an Nb{sub 3}Sn strand will degrade obviously when it is subjected to high mechanical loads. Based on the dispersed distribution of cracks in the bronze strand due to a high axial tensile strain, we propose an analytical strand model to describe the influence of cracks on the critical current of the Nb{sub 3}Sn strand. The dependence of the critical current I{sub c} of the strand on crack density is investigated theoretically. It is shown that the calculation results by this model agree with the experimental data. The influence of filament-to-matrix resistance r{sub c} on transport degradation is also discussed since r{sub c} is a key parameter for the total voltage calculation and its realistic value is of great importance for accurate results. We also compared the influence of dispersed and collective cracks on transport properties with specific conditions.},
doi = {10.1007/S10948-017-4362-4},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 5,
volume = 31,
place = {United States},
year = {2018},
month = {5}
}