Significant enhancement of the critical current of MgB2 wires through a reduction of the diameter using HIP method

被引：22

作者：

Gajda, D. ^{[1
,2
,3
]}

Morawski, A. ^{[4
]}

Zaleski, A. J. ^{[1
,2
]}

Cetner, T. ^{[4
]}

Haessler, W. ^{[5
]}

Nenkov, K. ^{[5
]}

Malecka, M. ^{[2
,3
]}

Rindfleisch, M. A. ^{[6
]}

Tomsic, M. ^{[6
]}

机构：

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

[2] Polish Acad Sci, Ctr Adv Mat & Smart Struct, Okolna 2, PL-50950 Wroclaw, Poland

[3] Int Lab High Magnet Fields & Low Temp HMF & LT, Gajowicka 95, PL-53421 Wroclaw, Poland

[4] Polish Acad Sci, Inst High Pressure Phys, Sokolowska 29-37, PL-01142 Warsaw, Poland

[5] Inst Solid State & Mat Res Dresden, POB 270016, D-01171 Dresden, Germany

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

来源：

SCRIPTA MATERIALIA | 2018年 / 143卷

关键词：

Boron compounds - Wire;

D O I：

10.1016/j.scriptamat.2017.09.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have succeeded in the fabrication of high-J(c) MgB2 wires applying hot isostatic pressure process through a reduction of the wire diameter. The results show that annealing at 570 degrees C in pressure of 1.1 GPa allows for high critical current density in undoped MgB2 wires e.g. at 4.2 K-1000 A/mm(2) in 8.1 T, 100 A/mm(2) in 13 T and at 20 K-100 A/mm(2) in 5.2 T. The reduction of the MgB2 wire diameter induces the number of connections between the grains retaining the circular shape of the wires and increasing the density of pinning centers active at 20 K. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：77 / 80

页数：4

共 25 条

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