Enhancement of critical current density of in situ processed MgB2 tapes by WB addition

被引：20

作者：

Fujii, H ^{[1
]}

Togano, K ^{[1
]}

Kumakura, H ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Supercond Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2003年 / 16卷 / 04期

关键词：

D O I：

10.1088/0953-2048/16/4/302

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of tungsten boride (WB) addition on the microstructure and superconducting properties of Fe-sheathed MgB2 tapes has been investigated. The microstructure was not influenced appreciably by the addition, whereas the superconducting properties changed. Even by a 5 mol% addition, the critical temperature (T-c) decreased by about 0.5 K. However, the field dependence of the inductive critical current density (J(ci)) became smaller with the increase in the amount of addition, suggesting that pinning centres effective in a high-field region were possibly introduced. The transport critical current density (j(ct)) at 4.2 K increased about twice by the 5 mol% addition and reached 15 and 5 kA cm(-2) at 8 and 10 T, respectively.

引用

页码：432 / 436

页数：5

共 18 条

[1] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS [J].

BEAN, CP .

REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :31-+

[2] Magnetic characterization of sintered MgB2 samples:: effect of substitution or 'doping' with Li, Al and Si [J].

Cimberle, MR ;

Novak, M ;

Manfrinetti, P ;

Palenzona, A .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2002, 15 (01) :43-47

[3]

DOU SZ, 2002, APPL SUP C HOUST 200

[4] High critical current density and enhanced irreversibility field in superconducting MgB2 thin films [J].

Eom, CB ;

Lee, MK ;

Choi, JH ;

Belenky, LJ ;

Song, X ;

Cooley, LD ;

Naus, MT ;

Patnaik, S ;

Jiang, J ;

Rikel, M ;

Polyanskii, A ;

Gurevich, A ;

Cai, XY ;

Bu, SD ;

Babcock, SE ;

Hellstrom, EE ;

Larbalestier, DC ;

Rogado, N ;

Regan, KA ;

Hayward, MA ;

He, T ;

Slusky, JS ;

Inumaru, K ;

Haas, MK ;

Cava, RJ .

NATURE, 2001, 411 (6837) :558-560

[5] Improvement of critical current density in MgB2 superconductors by Zr doping at ambient pressure [J].

Feng, Y ;

Zhao, Y ;

Sun, YP ;

Liu, FC ;

Fu, BQ ;

Zhou, L ;

Cheng, CH ;

Koshizuka, N ;

Murakami, M .

APPLIED PHYSICS LETTERS, 2001, 79 (24) :3983-3985

[6] Improved critical current in MgB2 tapes sheathed with carbon steels [J].

Fujii, H ;

Kumakura, H ;

Togano, K .

JOURNAL OF MATERIALS RESEARCH, 2002, 17 (09) :2339-2345

[7]

FUJII H, 2002, APPL SUP C HOUST 200

[8] Superconductivity of powder-in-tube MgB2 wires [J].

Glowacki, BA ;

Majoros, M ;

Vickers, M ;

Evetts, JE ;

Shi, Y ;

McDougall, I .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2001, 14 (04) :193-199

[9] High critical currents in iron-clad superconducting MgB2 wires [J].

Jin, S ;

Mavoori, H ;

Bower, C ;

van Dover, RB .

NATURE, 2001, 411 (6837) :563-565

[10] High transport critical current density obtained for powder-in-tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes [J].

Kumakura, H ;

Matsumoto, A ;

Fujii, H ;

Togano, K .

APPLIED PHYSICS LETTERS, 2001, 79 (15) :2435-2437

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