Influence of rapid heating condition on superconducting properties in transformed jelly-roll Nb3Al multifilamentary wire

N. Harada; T. Nakano; M. Tsuda; T. Hamajima; F. Buta; E. Lee; M. D. Sumption; E. W. Collings; K. Tagawa; H. Moriai; T. Takeuchi; H. Wada; K. Watanabe

doi:10.1109/TASC.2002.1018577

Influence of rapid heating condition on superconducting properties in transformed jelly-roll Nb₃Al multifilamentary wire

N. Harada, T. Nakano, M. Tsuda, T. Hamajima, F. Buta, E. Lee, M. D. Sumption, E. W. Collings, K. Tagawa, H. Moriai, T. Takeuchi, H. Wada, K. Watanabe

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Understanding the variation of the superconducting properties as a function of the maximum heat treatment temperature or heating time in jelly-roll Nb₃Al wire is important for the optimization of the rapid heating conditions. Jelly-roll Nb₃Al wires with a Nb matrix were ohmically-heated to maximum temperatures ranging from 1900 to 2300°C in vacuum in order to optimize the rapid heating conditions and to investigate the superconducting properties for this transformation method. The diameter of the wire was 0.94 mm. The sample was monitored using a noncontact measurement technique employing a photodiode to measure high temperatures (over 2000°C) during rapid heating. After the surface temperature reached a maximum, the sample was quenched in liquid gallium. The samples were annealed for 10 hours at 800°C after the rapid heating process to transform the bcc-phase to the A15 phase. The superconducting properties including DC magnetization and critical current were explored for various maximum heating temperatures and heating times. The magnetic field dependence of the pinning force density was investigated for these various conditions.

Original language	English
Pages (from-to)	1033-1036
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	12
Issue number	1
DOIs	https://doi.org/10.1109/TASC.2002.1018577
Publication status	Published - 2002 Mar
Externally published	Yes
Event	17th Annual Conference on Magnet Technology - Geneva, Switzerland Duration: 2001 Sep 24 → 2001 Sep 28

Keywords

NbAl
Ohmic heating
Pinning force density
Superconducting materials

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2002.1018577

Cite this

Harada, N., Nakano, T., Tsuda, M., Hamajima, T., Buta, F., Lee, E., Sumption, M. D., Collings, E. W., Tagawa, K., Moriai, H., Takeuchi, T., Wada, H., & Watanabe, K. (2002). Influence of rapid heating condition on superconducting properties in transformed jelly-roll Nb₃Al multifilamentary wire. IEEE Transactions on Applied Superconductivity, 12(1), 1033-1036. https://doi.org/10.1109/TASC.2002.1018577

Harada, N, Nakano, T, Tsuda, M, Hamajima, T, Buta, F, Lee, E, Sumption, MD, Collings, EW, Tagawa, K, Moriai, H, Takeuchi, T, Wada, H & Watanabe, K 2002, 'Influence of rapid heating condition on superconducting properties in transformed jelly-roll Nb₃Al multifilamentary wire', IEEE Transactions on Applied Superconductivity, vol. 12, no. 1, pp. 1033-1036. https://doi.org/10.1109/TASC.2002.1018577

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abstract = "Understanding the variation of the superconducting properties as a function of the maximum heat treatment temperature or heating time in jelly-roll Nb3Al wire is important for the optimization of the rapid heating conditions. Jelly-roll Nb3Al wires with a Nb matrix were ohmically-heated to maximum temperatures ranging from 1900 to 2300°C in vacuum in order to optimize the rapid heating conditions and to investigate the superconducting properties for this transformation method. The diameter of the wire was 0.94 mm. The sample was monitored using a noncontact measurement technique employing a photodiode to measure high temperatures (over 2000°C) during rapid heating. After the surface temperature reached a maximum, the sample was quenched in liquid gallium. The samples were annealed for 10 hours at 800°C after the rapid heating process to transform the bcc-phase to the A15 phase. The superconducting properties including DC magnetization and critical current were explored for various maximum heating temperatures and heating times. The magnetic field dependence of the pinning force density was investigated for these various conditions.",

keywords = "NbAl, Ohmic heating, Pinning force density, Superconducting materials",

author = "N. Harada and T. Nakano and M. Tsuda and T. Hamajima and F. Buta and E. Lee and Sumption, {M. D.} and Collings, {E. W.} and K. Tagawa and H. Moriai and T. Takeuchi and H. Wada and K. Watanabe",

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AU - Nakano, T.

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AU - Hamajima, T.

AU - Buta, F.

AU - Lee, E.

AU - Sumption, M. D.

AU - Collings, E. W.

AU - Tagawa, K.

AU - Moriai, H.

AU - Takeuchi, T.

AU - Wada, H.

AU - Watanabe, K.

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N2 - Understanding the variation of the superconducting properties as a function of the maximum heat treatment temperature or heating time in jelly-roll Nb3Al wire is important for the optimization of the rapid heating conditions. Jelly-roll Nb3Al wires with a Nb matrix were ohmically-heated to maximum temperatures ranging from 1900 to 2300°C in vacuum in order to optimize the rapid heating conditions and to investigate the superconducting properties for this transformation method. The diameter of the wire was 0.94 mm. The sample was monitored using a noncontact measurement technique employing a photodiode to measure high temperatures (over 2000°C) during rapid heating. After the surface temperature reached a maximum, the sample was quenched in liquid gallium. The samples were annealed for 10 hours at 800°C after the rapid heating process to transform the bcc-phase to the A15 phase. The superconducting properties including DC magnetization and critical current were explored for various maximum heating temperatures and heating times. The magnetic field dependence of the pinning force density was investigated for these various conditions.

AB - Understanding the variation of the superconducting properties as a function of the maximum heat treatment temperature or heating time in jelly-roll Nb3Al wire is important for the optimization of the rapid heating conditions. Jelly-roll Nb3Al wires with a Nb matrix were ohmically-heated to maximum temperatures ranging from 1900 to 2300°C in vacuum in order to optimize the rapid heating conditions and to investigate the superconducting properties for this transformation method. The diameter of the wire was 0.94 mm. The sample was monitored using a noncontact measurement technique employing a photodiode to measure high temperatures (over 2000°C) during rapid heating. After the surface temperature reached a maximum, the sample was quenched in liquid gallium. The samples were annealed for 10 hours at 800°C after the rapid heating process to transform the bcc-phase to the A15 phase. The superconducting properties including DC magnetization and critical current were explored for various maximum heating temperatures and heating times. The magnetic field dependence of the pinning force density was investigated for these various conditions.

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