Microstructure and superconducting properties of hot isostatically pressed MgB2

被引：70

作者：

Shields, TC ^{[1
]}

Kawano, K ^{[1
]}

Holdom, D ^{[1
]}

Abell, JS ^{[1
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2002年 / 15卷 / 02期

关键词：

D O I：

10.1088/0953-2048/15/2/303

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bulk samples of MgB2 have been formed by hot isostatic pressing (HIPping) of commercial powder at 100 MPa and 950 degreesC. The resulting material is 100% dense with a sharp superconducting transition at 37.5 K. Microstructural studies have indicated the presence of small amounts of second phases within the material, namely MgO- and B-rich compositions, probably MgB4. Magnetization measurements performed at 20 K have revealed values of J(c) = 1.3 x 10(6) A cm(-2) at zero-field and 9.3 x 10(5) A cm(-2) at 1 T. Magneto-optical (MO) studies have shown direct evidence for the superconducting homogeneity and strong intergranular current flow in the material.

引用

页码：202 / 205

页数：4

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