Effect of boron particle size on microstructure and superconducting properties of in-situ Cu addition MgB2 multifilamentary wire

Y. Hishinuma, A. Kikuchi, Y. Shimada, S. Hata, T. Takeuchi, S. Yamada, A. Sagara

研究成果: ジャーナルへの寄稿Conference article

3 引用 (Scopus)

抄録

In previous studies, the secondary (impurity and non-reactive) phase and voids were observed in MgB2 matrix after the heat treatment, and then these are the lowering factors of critical current density (Jc) property. In order to improve Jc property by microstructure control of MgB2 matrix, the fine elemental boron powder as the raw material was carried out using the high-speed vibrated milling with tungsten carbide (WC) jar. The average particle size of metal boron powder was decreased from 1.14 μm to 0.20 μm by the high-speed vibrated milling. The various fine particle boron powders as the function of milling time were also prepared, and in-situ Cu addition MgB2 multifilamentary wires using these fine boron powders were fabricated. Critical transition temperature (Tc) value of Cu addition MgB2 wire using fine boron powder obtained to about 37 K. No change of the Tc property by the different particle sized boron powders was confirmed. In this paper, the comparisons of microstructure and superconducting properties between the different boron particle sizes were investigated.

元の言語英語
記事番号022009
ジャーナルJournal of Physics: Conference Series
507
発行部数PART 2
DOI
出版物ステータス出版済み - 1 1 2014
イベント11th European Conference on Applied Superconductivity, EUCAS 2013 - Genoa, イタリア
継続期間: 9 15 20139 19 2013

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boron
wire
microstructure
high speed
tungsten carbides
matrices
voids
critical current
critical temperature
heat treatment
transition temperature
current density
impurities
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Effect of boron particle size on microstructure and superconducting properties of in-situ Cu addition MgB2 multifilamentary wire. / Hishinuma, Y.; Kikuchi, A.; Shimada, Y.; Hata, S.; Takeuchi, T.; Yamada, S.; Sagara, A.

:: Journal of Physics: Conference Series, 巻 507, 番号 PART 2, 022009, 01.01.2014.

研究成果: ジャーナルへの寄稿Conference article

Hishinuma, Y. ; Kikuchi, A. ; Shimada, Y. ; Hata, S. ; Takeuchi, T. ; Yamada, S. ; Sagara, A. / Effect of boron particle size on microstructure and superconducting properties of in-situ Cu addition MgB2 multifilamentary wire. :: Journal of Physics: Conference Series. 2014 ; 巻 507, 番号 PART 2.
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AU - Kikuchi, A.

AU - Shimada, Y.

AU - Hata, S.

AU - Takeuchi, T.

AU - Yamada, S.

AU - Sagara, A.

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N2 - In previous studies, the secondary (impurity and non-reactive) phase and voids were observed in MgB2 matrix after the heat treatment, and then these are the lowering factors of critical current density (Jc) property. In order to improve Jc property by microstructure control of MgB2 matrix, the fine elemental boron powder as the raw material was carried out using the high-speed vibrated milling with tungsten carbide (WC) jar. The average particle size of metal boron powder was decreased from 1.14 μm to 0.20 μm by the high-speed vibrated milling. The various fine particle boron powders as the function of milling time were also prepared, and in-situ Cu addition MgB2 multifilamentary wires using these fine boron powders were fabricated. Critical transition temperature (Tc) value of Cu addition MgB2 wire using fine boron powder obtained to about 37 K. No change of the Tc property by the different particle sized boron powders was confirmed. In this paper, the comparisons of microstructure and superconducting properties between the different boron particle sizes were investigated.

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