Journal ArticleDOI
Strain dependence of the critical current and critical field in multifilamentary Nb 3 Sn composites
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In this article, the performance of high-J c multifilamentary Nb 3 Sn superconductors with widely varying amounts of prestrain and critical field values can be characterized fairly accurately by a single normalized critical field-strain relationship.Abstract:
High-J c multifilamentary Nb 3 Sn superconductors with widely varying amounts of prestrain and critical field values can be characterized fairly accurately by a single normalized critical field-strain relationship. Such a relationship permits first order prediction of critical-current degradation at arbitrary magnetic field magnitudes knowing only two parameters for any conductor, the prestrain and the maximum critical field. Some of the conductor-fabrication factors affecting the parameters are considered.read more
Citations
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Journal ArticleDOI
Strain scaling law for flux pinning in practical superconductors. Part 1: Basic relationship and application to Nb3Sn conductors
TL;DR: In this article, the authors present the basic uniaxial-strain scaling relationship and focus on its application to Nb3Sn conductors, and propose a general scaling relation which unifies the usual temperature scaling relation with this strain-scaling relation.
Journal ArticleDOI
Effect of axial strain on the critical current of Ag‐sheathed Bi‐based superconductors in magnetic fields up to 25 T
TL;DR: In this paper, the irreversible strain limit for the onset of permanent axial strain damage to Ag-sheathed Bi2Sr2Ca1Cu2O8+x and Bi 2Sr 2Ca2Cu3O10+x superconductors has been measured to be in the range of 0.2% −0.35%.
Book ChapterDOI
Strain Effects in Superconducting Compounds
TL;DR: In this article, Ekin, Fickett, and Clark measured the reversible nonhydrostatic strain effect in a commercial multifilamentary NbTi conductor and found that the interaction could not be explained simply by filament breakage, heating, or cross-sectional area reduction, but appeared to be intrinsic to the superconducting material itself.
Book ChapterDOI
Strain Scaling Law and the Prediction of Uniaxial and Bending Strain Effects in Multifilamentary Superconductors
TL;DR: In this article, it was shown that at 4.2 K, the critical pinning-force density of a wide range of practical conductors obeys a scaling law of the form: ==================\/\/\/\/\/\/£££/$££€££$££ £££
Journal ArticleDOI
A prediction of the stress state in Nb3Sn superconducting composites
TL;DR: In this article, a simple analytical method was proposed to predict the residual stress state and the stress strain curves of Nb3Sn composites at 4.2 K. The method requires only a prior knowledge of the volume fraction of the composite components and the percentage of the Nb converted to Nb 3Sn.
References
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Journal ArticleDOI
Scaling laws for flux pinning in hard superconductors
TL;DR: In this paper, it was shown that the peak in Fp scales as [Hc2(T)]2.5 if the temperature is changed; the maximum value of Fp occurred at the same value of reduced field regardless of temperature.
Journal ArticleDOI
Current transfer in multifilamentary superconductors. I. Theory
TL;DR: In this paper, a simple approximate analytic expression for estimating the magnitude of this slope from wire parameters is developed for multifilamentary NbTi and Nb3Sn composite superconductors.
Journal ArticleDOI
Effect of stress on the critical current of Nb3Sn multifilamentary composite wire
TL;DR: In this article, a critical current study of flexible Nb3Sn multifilamentary composite wires has been conducted at 4 K in magnetic fields to 90 kOe (7.2×106 A/m) while the wire is subjected to high mechanical stresses.
Journal ArticleDOI
Superconducting properties of in situ prepared Nb-Cu-Sn alloys
TL;DR: In this paper, the critical current properties and the resistance to degradation of Jc upon mechanical deformation both compare favorably to commercial Nb3Sn tape, which was formed by plating and diffusion of Sn.
Journal ArticleDOI
Effects of stresses, induced by thermal contraction of a bronze matrix, on the superconducting properties of Nb3Sn wires
Thomas Luhman,Masaki Suenaga +1 more
TL;DR: The superconducting critical temperature Tc and high magnetic field critical current densities Jc have been measured on Nb3Sn single-core wires prior to and after removing the outer bronze cladding.