MgB2/Fe superconducting tapes made using mechanically milled powders in Ar and H2 atmospheres

被引：13

作者：

Kondo, T

Badica, P

Nakamori, Y

Orimo, S

Togano, K

Nishijima, G

Watanabe, K

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Natl Inst Mat Phys, RO-76900 Bucharest, Romania

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2005年 / 426卷 / II期

关键词：

MgB2-tapes; mechanical milling; J(c); microstructure; reactivity;

D O I：

10.1016/j.physc.2005.02.104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Fe-sheathed tapes of MgB2 with addition of SiC have been prepared by the powder-in-tube (PIT) method using a powder mixture mechanically milled in an argon or hydrogen atmosphere. The reactivity of the component powders in the mixtures, Mg, B and SiC, was significantly enhanced by mechanical milling, so that MgB, formed faster than in tapes fabricated from a hand-milled mixture. At the same time the number of impurity phases was higher, and the impurity phases of Mg2Si and Fe2B were observed only in these tapes. Mechanical milling also induced a lower quality of MgB2, especially for tapes produced from powders milled in a hydrogen atmosphere, with a significant influence on the values of the critical temperature T-C and critical field, J(C). (c) 2005 Published by Elsevier B.V.

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收藏

页码：1231 / 1237

页数：7

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