The Optimization ofJc,Birr,nvalue, Wires Diameter, and Research of the Dominant Pinning Mechanism for Applications of Undoped MgB2in Superconducting Multi-section Coils

被引：8

作者：

Gajda, D. ^{[1
]}

Zaleski, A. J. ^{[1
]}

Morawski, A. ^{[2
]}

Cetner, T. ^{[2
]}

Malecka, M. ^{[1
]}

Rindfleisch, M. ^{[3
]}

机构：

[1] PAS, Inst Low Temp & Struct Res, Okolna 2, PL-50422 Wroclaw, Poland

[2] PAS, Inst High Pressure Phys, Unipress, Sokolowska 29-37, PL-01142 Warsaw, Poland

[3] Hyper Tech Res Inc, 539 Ind Mile Rd, Columbus, OH 43228 USA

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2020年 / 33卷 / 12期

关键词：

Critical current density; nvalue; Irreversible magnetic field; CRITICAL-CURRENT DENSITY; MGB2; WIRES; ISOSTATIC PRESSURE; N-VALUE; CENTERS; POWDER;

D O I：

10.1007/s10948-020-05663-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This article discusses the influence of MgB(2)wire diameter on critical parameters, dominant pinning mechanism, andnvalue. Studies were conducted on multifilament MgB(2)wires of the 0.84 mm and 0.64 mm diameter. The wires were annealed under 1 GPa isostatic pressure, between 650 and 730 degrees C. Studies show that the best results (J(c),B-irr,nvalue, and point pinning mechanism) for a 0.64-mm wire were obtained with annealing temperature of 650 degrees C. However, the best results for wires with a 0.84-mm diameter were obtained with annealing temperature of 730 degrees C. This research was conducted for exploring the use of MgB(2)wires in multi-section superconducting coils, e.g., main coils generating magnetic fields and compensation coils-increasing the homogeneity of the magnetic field. Our research indicates that the main coil made with larger diameter wires should be heated at higher temperature (730 degrees C). In contrast, compensating coils with smaller diameter wires should be heated at a lower temperature (650 degrees C).

引用

页码：3717 / 3725

页数：9

共 36 条

[1] Grain coupling and critical current density in Fe-sheathed carbon-substituted MgB2 tapes fabricated through an ex situ process using chemically treated powder [J].

Fujii, H. ;

Togano, K. ;

Ozawa, K. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2008, 21 (09)

[2] Pinning mechanism and engineering critical current density considerations in the design of MgB2superconducting coils [J].

Gajda, D. ;

Zaleski, A. J. ;

Morawski, A. J. ;

Hassler, W. ;

Nenkov, K. ;

Rindfleisch, M. A. ;

Hossain, M. S. A. .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2020, 570

[3] Formation of High-Field Pinning Centers in Superconducting MgB2 Wires by Using High Hot Isostatic Pressure Process [J].

Gajda, D. ;

Morawski, A. ;

Zaleski, A. J. ;

Akdogan, M. ;

Yetis, H. ;

Karaboga, F. ;

Cetner, T. ;

Belenli, I. .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2017, 30 (12) :3397-3402

[4] Significant enhancement of the critical current of MgB2 wires through a reduction of the diameter using HIP method [J].

Gajda, D. ;

Morawski, A. ;

Zaleski, A. J. ;

Cetner, T. ;

Haessler, W. ;

Nenkov, K. ;

Malecka, M. ;

Rindfleisch, M. A. ;

Tomsic, M. .

SCRIPTA MATERIALIA, 2018, 143 :77-80

[5] Experimental research of high field pinning centers in 2% C doped MgB2 wires at 20K and 25K [J].

Gajda, D. ;

Morawski, A. ;

Zaleski, A. J. ;

Haessler, W. ;

Nenkov, K. ;

Malecka, M. ;

Rindfleisch, M. A. ;

Hossain, M. S. A. ;

Tomsic, M. .

JOURNAL OF APPLIED PHYSICS, 2016, 120 (11)

[6] Point pinning centers in SiC doped MgB2 wires after HIP [J].

Gajda, D. ;

Zaleski, A. ;

Morawski, A. ;

Cetner, T. ;

Thong, C. J. ;

Rindfleisch, M. A. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2016, 29 (08)

[7] The electric field jump-detection of damaged Nb barrier in MgB2 wires annealed under pressure [J].

Gajda, D. ;

Zaleski, A. J. ;

Morawski, A. ;

Rindfleisch, M. ;

Thong, C. ;

Tomsic, M. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2015, 28 (11)

[8] The critical parameters in in-situ MgB2 wires and tapes with ex-situ MgB2 barrier after hot isostatic pressure, cold drawing, cold rolling and doping [J].

Gajda, D. ;

Morawski, A. ;

Zaleski, A. J. ;

Haessler, W. ;

Nenkov, K. ;

Rindfleisch, M. A. ;

Zuchowska, E. ;

Gajda, G. ;

Czujko, T. ;

Cetner, T. ;

Hossain, M. S. A. .

JOURNAL OF APPLIED PHYSICS, 2015, 117 (17)

[9] Comparison of critical current density in SiC-doped in situ MgB2 coils and straight wire samples processed by HIP [J].

Gajda, D. ;

Morawski, A. ;

Zaleski, A. ;

Cetner, T. ;

Malecka, M. ;

Presz, A. ;

Rindfleisch, M. ;

Tomsic, M. ;

Thong, C. J. ;

Surdacki, P. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2013, 26 (11)

[10] Analysis Method of High-Field Pinning Centers in NbTi Wires and MgB2 Wires [J].

Gajda, Daniel .

JOURNAL OF LOW TEMPERATURE PHYSICS, 2019, 194 (1-2) :166-182

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