Significant enhancement of flux pinning in MgB2/Fe/Cu superconducting wires fabricated by in situ powder-in-tube method

Y. Feng; G. Yan; Y. Zhao; P. X. Zhang; E. Mossang; A. Sulpice; L. Zhou

doi:10.1016/j.physc.2005.02.103

Significant enhancement of flux pinning in MgB₂/Fe/Cu superconducting wires fabricated by in situ powder-in-tube method

Y. Feng, G. Yan, Y. Zhao, P. X. Zhang, E. Mossang, A. Sulpice, L. Zhou

Research output: Contribution to journal › Conference article › peer-review

7 Scopus citations

Abstract

Dense MgB₂/Fe/Cu wires with and without Zr doping were successfully prepared through the in situ powder-in-tube (PIT) method. MgB ₂/Fe/Cu wires were sintered at 650-850 °C for 2 h in argon. Critical current density (J_c) of the wires was measured at different temperatures in the magnetic field up to 8 T by standard four probe method. As shown by inductive measurements, the heat treatment temperature has an obvious influence on flux pinning of MgB₂ wire. Also it is found that the flux pinning in MgB₂ wire can be remarkably improved by Zr doping. The microstructure observation for MgB₂ wires shows that MgB ₂/Fe/Cu wire with Zr doping has better grain connectivity and higher density than other samples. The mechanism leading to high transport critical current densities of MgB₂/Fe/Cu wires based on MgB₂ grain size is discussed. The results indicate that the J_c can be further improved to meet the requirement for applications by optimizing the process conditions.

Original language	English
Pages (from-to)	1216-1219
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	426-431
Issue number	II
DOIs	https://doi.org/10.1016/j.physc.2005.02.103
State	Published - 2005
Externally published	Yes
Event	Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - Duration: 23 Nov 2004 → 25 Nov 2004

Keywords

Flux pinning
In situ fabrication
MgB wire
Transport J

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10.1016/j.physc.2005.02.103

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title = "Significant enhancement of flux pinning in MgB2/Fe/Cu superconducting wires fabricated by in situ powder-in-tube method",

abstract = "Dense MgB2/Fe/Cu wires with and without Zr doping were successfully prepared through the in situ powder-in-tube (PIT) method. MgB 2/Fe/Cu wires were sintered at 650-850 °C for 2 h in argon. Critical current density (Jc) of the wires was measured at different temperatures in the magnetic field up to 8 T by standard four probe method. As shown by inductive measurements, the heat treatment temperature has an obvious influence on flux pinning of MgB2 wire. Also it is found that the flux pinning in MgB2 wire can be remarkably improved by Zr doping. The microstructure observation for MgB2 wires shows that MgB 2/Fe/Cu wire with Zr doping has better grain connectivity and higher density than other samples. The mechanism leading to high transport critical current densities of MgB2/Fe/Cu wires based on MgB2 grain size is discussed. The results indicate that the Jc can be further improved to meet the requirement for applications by optimizing the process conditions.",

keywords = "Flux pinning, In situ fabrication, MgB wire, Transport J",

author = "Y. Feng and G. Yan and Y. Zhao and Zhang, {P. X.} and E. Mossang and A. Sulpice and L. Zhou",

year = "2005",

doi = "10.1016/j.physc.2005.02.103",

language = "英语",

volume = "426-431",

pages = "1216--1219",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "II",

note = "Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

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TY - JOUR

T1 - Significant enhancement of flux pinning in MgB2/Fe/Cu superconducting wires fabricated by in situ powder-in-tube method

AU - Feng, Y.

AU - Yan, G.

AU - Zhao, Y.

AU - Zhang, P. X.

AU - Mossang, E.

AU - Sulpice, A.

AU - Zhou, L.

PY - 2005

Y1 - 2005

N2 - Dense MgB2/Fe/Cu wires with and without Zr doping were successfully prepared through the in situ powder-in-tube (PIT) method. MgB 2/Fe/Cu wires were sintered at 650-850 °C for 2 h in argon. Critical current density (Jc) of the wires was measured at different temperatures in the magnetic field up to 8 T by standard four probe method. As shown by inductive measurements, the heat treatment temperature has an obvious influence on flux pinning of MgB2 wire. Also it is found that the flux pinning in MgB2 wire can be remarkably improved by Zr doping. The microstructure observation for MgB2 wires shows that MgB 2/Fe/Cu wire with Zr doping has better grain connectivity and higher density than other samples. The mechanism leading to high transport critical current densities of MgB2/Fe/Cu wires based on MgB2 grain size is discussed. The results indicate that the Jc can be further improved to meet the requirement for applications by optimizing the process conditions.

AB - Dense MgB2/Fe/Cu wires with and without Zr doping were successfully prepared through the in situ powder-in-tube (PIT) method. MgB 2/Fe/Cu wires were sintered at 650-850 °C for 2 h in argon. Critical current density (Jc) of the wires was measured at different temperatures in the magnetic field up to 8 T by standard four probe method. As shown by inductive measurements, the heat treatment temperature has an obvious influence on flux pinning of MgB2 wire. Also it is found that the flux pinning in MgB2 wire can be remarkably improved by Zr doping. The microstructure observation for MgB2 wires shows that MgB 2/Fe/Cu wire with Zr doping has better grain connectivity and higher density than other samples. The mechanism leading to high transport critical current densities of MgB2/Fe/Cu wires based on MgB2 grain size is discussed. The results indicate that the Jc can be further improved to meet the requirement for applications by optimizing the process conditions.

KW - Flux pinning

KW - In situ fabrication

KW - MgB wire

KW - Transport J

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DO - 10.1016/j.physc.2005.02.103

M3 - 会议文章

AN - SCOPUS:25444485714

SN - 0921-4534

VL - 426-431

SP - 1216

EP - 1219

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - II

T2 - Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Significant enhancement of flux pinning in MgB₂/Fe/Cu superconducting wires fabricated by in situ powder-in-tube method

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Keywords

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