Microstructure and superconducting properties of Cu addition MgB2 multifilamentary wires using boron isotope powder as the boron source material

Y. Hishinuma, A. Kikuchi, K. Matsuda, K. Nishimura, Y. Kubota, S. Hata, S. Yamada, T. Takeuchi

研究成果: ジャーナルへの寄稿Conference article

10 引用 (Scopus)

抄録

The natural boron has two kinds of isotopes which are existed 20 wt% boron-10 (10B) and 80 wt% boron-11 (11B). 11B isotope is stable against the neutron irradiation without nuclear transformation. For an advanced fusion application, in-situ PIT process using 11B isotope powder as the boron source material was desirable to enhance low induced radio-activity of MgB2superconducting wire. We tried to fabricate the in-situ Cu addition MgB2/Ta/Cu multifilamenatry wire using boron isotope powder as the boron source material. In this study, superconductivity and microstructure of MgB2 wire using boron isotope powder were investigated. Tc value of MgB2 wire using 11B powder was shown to about 37 K by the low temperature diffusion reaction, and its value was higher than commercial natural powder. However, Jc value of MgB2 wire using 11B isotope powder was remarkably lower than that of commercial natural powder. This is caused by the forming of much impurity phase and decrease of MgB2 volume fraction due to the remaining of much non-reactive 11B isotope powder.

元の言語英語
ページ(範囲)1486-1491
ページ数6
ジャーナルPhysics Procedia
36
DOI
出版物ステータス出版済み - 1 1 2012
イベントSuperconductivity Centennial Conference, SCC 2011 - The Hague, オランダ
継続期間: 9 18 20119 23 2011

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boron isotopes
boron
wire
microstructure
isotopes
nuclear transformations
boron 10
pulsed inductive thrusters
neutron irradiation
radioactivity
superconductivity
fusion
impurities

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Microstructure and superconducting properties of Cu addition MgB2 multifilamentary wires using boron isotope powder as the boron source material. / Hishinuma, Y.; Kikuchi, A.; Matsuda, K.; Nishimura, K.; Kubota, Y.; Hata, S.; Yamada, S.; Takeuchi, T.

:: Physics Procedia, 巻 36, 01.01.2012, p. 1486-1491.

研究成果: ジャーナルへの寄稿Conference article

Hishinuma, Y. ; Kikuchi, A. ; Matsuda, K. ; Nishimura, K. ; Kubota, Y. ; Hata, S. ; Yamada, S. ; Takeuchi, T. / Microstructure and superconducting properties of Cu addition MgB2 multifilamentary wires using boron isotope powder as the boron source material. :: Physics Procedia. 2012 ; 巻 36. pp. 1486-1491.
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T1 - Microstructure and superconducting properties of Cu addition MgB2 multifilamentary wires using boron isotope powder as the boron source material

AU - Hishinuma, Y.

AU - Kikuchi, A.

AU - Matsuda, K.

AU - Nishimura, K.

AU - Kubota, Y.

AU - Hata, S.

AU - Yamada, S.

AU - Takeuchi, T.

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N2 - The natural boron has two kinds of isotopes which are existed 20 wt% boron-10 (10B) and 80 wt% boron-11 (11B). 11B isotope is stable against the neutron irradiation without nuclear transformation. For an advanced fusion application, in-situ PIT process using 11B isotope powder as the boron source material was desirable to enhance low induced radio-activity of MgB2superconducting wire. We tried to fabricate the in-situ Cu addition MgB2/Ta/Cu multifilamenatry wire using boron isotope powder as the boron source material. In this study, superconductivity and microstructure of MgB2 wire using boron isotope powder were investigated. Tc value of MgB2 wire using 11B powder was shown to about 37 K by the low temperature diffusion reaction, and its value was higher than commercial natural powder. However, Jc value of MgB2 wire using 11B isotope powder was remarkably lower than that of commercial natural powder. This is caused by the forming of much impurity phase and decrease of MgB2 volume fraction due to the remaining of much non-reactive 11B isotope powder.

AB - The natural boron has two kinds of isotopes which are existed 20 wt% boron-10 (10B) and 80 wt% boron-11 (11B). 11B isotope is stable against the neutron irradiation without nuclear transformation. For an advanced fusion application, in-situ PIT process using 11B isotope powder as the boron source material was desirable to enhance low induced radio-activity of MgB2superconducting wire. We tried to fabricate the in-situ Cu addition MgB2/Ta/Cu multifilamenatry wire using boron isotope powder as the boron source material. In this study, superconductivity and microstructure of MgB2 wire using boron isotope powder were investigated. Tc value of MgB2 wire using 11B powder was shown to about 37 K by the low temperature diffusion reaction, and its value was higher than commercial natural powder. However, Jc value of MgB2 wire using 11B isotope powder was remarkably lower than that of commercial natural powder. This is caused by the forming of much impurity phase and decrease of MgB2 volume fraction due to the remaining of much non-reactive 11B isotope powder.

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