The microstructure of NbTi superconducting composite wire for ITER project

J. F. Li; P. X. Zhang; X. H. Liu; J. S. Li; Y. Feng; S. J. Du; T. C. Wang; W. T. Liu; G. Grunblatt; C. Verwaerde; G. K. Hoang

doi:10.1016/j.physc.2008.05.096

The microstructure of NbTi superconducting composite wire for ITER project

J. F. Li, P. X. Zhang, X. H. Liu, J. S. Li, Y. Feng, S. J. Du, T. C. Wang, W. T. Liu, G. Grunblatt, C. Verwaerde, G. K. Hoang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

This paper presents early results of the R&D programme carried out to optimize NbTi wires for the ITER poloidal field coils (PF). Using TEM, the influence of treatment conditions on the microstructure was investigated. The purpose is to find relations between the alloy microstructure and the NbTi wire critical current densities at 4.2 K. Typical NbTi with high critical current density at 4.2 K shows a microstructure (in transverse cross-section) with strongly folded and curled of α-Ti pinning centers dispersed within the superconducting β-NbTi matrix. It is believed that the higher temperature is beneficial to a higher 4.2 K J_c values, but these J_c values slightly decrease with increasing heat treatment durations.

Original language	English
Pages (from-to)	1840-1842
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	468
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2008.05.096
State	Published - 15 Sep 2008

Keywords

Critical current density
ITER
Microstructure
NbTi superconducting wire

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10.1016/j.physc.2008.05.096

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title = "The microstructure of NbTi superconducting composite wire for ITER project",

abstract = "This paper presents early results of the R&D programme carried out to optimize NbTi wires for the ITER poloidal field coils (PF). Using TEM, the influence of treatment conditions on the microstructure was investigated. The purpose is to find relations between the alloy microstructure and the NbTi wire critical current densities at 4.2 K. Typical NbTi with high critical current density at 4.2 K shows a microstructure (in transverse cross-section) with strongly folded and curled of α-Ti pinning centers dispersed within the superconducting β-NbTi matrix. It is believed that the higher temperature is beneficial to a higher 4.2 K Jc values, but these Jc values slightly decrease with increasing heat treatment durations.",

keywords = "Critical current density, ITER, Microstructure, NbTi superconducting wire",

author = "Li, {J. F.} and Zhang, {P. X.} and Liu, {X. H.} and Li, {J. S.} and Y. Feng and Du, {S. J.} and Wang, {T. C.} and Liu, {W. T.} and G. Grunblatt and C. Verwaerde and Hoang, {G. K.}",

year = "2008",

month = sep,

day = "15",

doi = "10.1016/j.physc.2008.05.096",

language = "英语",

volume = "468",

pages = "1840--1842",

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TY - JOUR

T1 - The microstructure of NbTi superconducting composite wire for ITER project

AU - Li, J. F.

AU - Zhang, P. X.

AU - Liu, X. H.

AU - Li, J. S.

AU - Feng, Y.

AU - Du, S. J.

AU - Wang, T. C.

AU - Liu, W. T.

AU - Grunblatt, G.

AU - Verwaerde, C.

AU - Hoang, G. K.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - This paper presents early results of the R&D programme carried out to optimize NbTi wires for the ITER poloidal field coils (PF). Using TEM, the influence of treatment conditions on the microstructure was investigated. The purpose is to find relations between the alloy microstructure and the NbTi wire critical current densities at 4.2 K. Typical NbTi with high critical current density at 4.2 K shows a microstructure (in transverse cross-section) with strongly folded and curled of α-Ti pinning centers dispersed within the superconducting β-NbTi matrix. It is believed that the higher temperature is beneficial to a higher 4.2 K Jc values, but these Jc values slightly decrease with increasing heat treatment durations.

AB - This paper presents early results of the R&D programme carried out to optimize NbTi wires for the ITER poloidal field coils (PF). Using TEM, the influence of treatment conditions on the microstructure was investigated. The purpose is to find relations between the alloy microstructure and the NbTi wire critical current densities at 4.2 K. Typical NbTi with high critical current density at 4.2 K shows a microstructure (in transverse cross-section) with strongly folded and curled of α-Ti pinning centers dispersed within the superconducting β-NbTi matrix. It is believed that the higher temperature is beneficial to a higher 4.2 K Jc values, but these Jc values slightly decrease with increasing heat treatment durations.

KW - Critical current density

KW - ITER

KW - Microstructure

KW - NbTi superconducting wire

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U2 - 10.1016/j.physc.2008.05.096

DO - 10.1016/j.physc.2008.05.096

M3 - 文章

AN - SCOPUS:50649121846

SN - 0921-4534

VL - 468

SP - 1840

EP - 1842

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 15-20

ER -

The microstructure of NbTi superconducting composite wire for ITER project

Abstract

Keywords

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