Pore structures and grain connectivity of bulk MgB2

被引：12

作者：

Ahn, J. -H. ^{[1
]}

Oh, S. ^{[2
]}

机构：

[1] Andong Natl Univ, Dept Mat Engn, Andong 760749, Gyungbuk, South Korea

[2] Natl Fus Res Inst, Fus Technol Dev Grp, Taejon 305333, South Korea

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2009年 / 469卷 / 15-20期

关键词：

Superconductors; Sintering; Densification; MgB2; SUPERCONDUCTOR;

D O I：

10.1016/j.physc.2009.05.111

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Pore structures and grain connectivity of magnesium diboride (MgB2) were examined. Poor densification is mainly due to random packing of angular MgB2 grains which conform to its crystal structure. The use of an excess Mg to stoichiometric MgB2 improved densification by filling intergranualr void spaces. The addition of C or Cu was also beneficial for grain connectivity by modifying the morphology of grains. In particular, ex situ reaction of pre-alloyed MgB2 with an excess Mg and the addition of Cu markedly reduced the pores, resulting in enhanced critical density. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1235 / 1238

页数：4

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