Transport properties of multifilamentary Ag-sheated Bi-2223 tapes under the influence of strain

Takanobu Kiss, Hans van Eck, H.J.N. van Eck, Bernard ten Haken, Herman H.J. ten Kate

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Current-voltage (I-V) characteristics in multifilamentary Ag/Bi2223 tapes are investigated as a function of mechanical strain. As is well known, the critical current, Ic, in axially elongated tape remains almost constant up to a strain around 0.5%, then is followed by a sharp reduction. However, for larger elongations, a long tail in the Ic-strain curve is observed, i.e., around 20% of the initial Ic still remains even at 0.8% strain. The irreversible Ic reduction indicates that the degradation comes from the breakdown of superconducting filaments. However, it is observed that the rupture risk probability reduces as the strain is increased in the long tail. This anomaly suggests that the measured strain of the whole tape is not identical to that of the HTS filaments inside the tape. We propose a model to describe the mechanical properties of the tape. It is shown that (1) the breakdown probability of the filaments is well described by the Weibull function if we calculate the influence of shearing between the superconducting filaments and the surrounding Ag sheath, (2) the Ic-strain properties can be described accurately by the model, (3) transport I-V characteristics can also be described simultaneously as a function of strain
Original languageUndefined
Pages (from-to)3888-3891
Number of pages4
JournalIEEE transactions on applied superconductivity
Volume11
Issue number1
DOIs
Publication statusPublished - 2001

Keywords

  • IR-36169
  • METIS-201149

Cite this

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title = "Transport properties of multifilamentary Ag-sheated Bi-2223 tapes under the influence of strain",
abstract = "Current-voltage (I-V) characteristics in multifilamentary Ag/Bi2223 tapes are investigated as a function of mechanical strain. As is well known, the critical current, Ic, in axially elongated tape remains almost constant up to a strain around 0.5{\%}, then is followed by a sharp reduction. However, for larger elongations, a long tail in the Ic-strain curve is observed, i.e., around 20{\%} of the initial Ic still remains even at 0.8{\%} strain. The irreversible Ic reduction indicates that the degradation comes from the breakdown of superconducting filaments. However, it is observed that the rupture risk probability reduces as the strain is increased in the long tail. This anomaly suggests that the measured strain of the whole tape is not identical to that of the HTS filaments inside the tape. We propose a model to describe the mechanical properties of the tape. It is shown that (1) the breakdown probability of the filaments is well described by the Weibull function if we calculate the influence of shearing between the superconducting filaments and the surrounding Ag sheath, (2) the Ic-strain properties can be described accurately by the model, (3) transport I-V characteristics can also be described simultaneously as a function of strain",
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author = "Takanobu Kiss and {van Eck}, Hans and {van Eck}, H.J.N. and {ten Haken}, Bernard and {ten Kate}, {Herman H.J.}",
year = "2001",
doi = "10.1109/77.919917",
language = "Undefined",
volume = "11",
pages = "3888--3891",
journal = "IEEE transactions on applied superconductivity",
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}

Transport properties of multifilamentary Ag-sheated Bi-2223 tapes under the influence of strain. / Kiss, Takanobu; van Eck, Hans; van Eck, H.J.N.; ten Haken, Bernard; ten Kate, Herman H.J.

In: IEEE transactions on applied superconductivity, Vol. 11, No. 1, 2001, p. 3888-3891.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Transport properties of multifilamentary Ag-sheated Bi-2223 tapes under the influence of strain

AU - Kiss, Takanobu

AU - van Eck, Hans

AU - van Eck, H.J.N.

AU - ten Haken, Bernard

AU - ten Kate, Herman H.J.

PY - 2001

Y1 - 2001

N2 - Current-voltage (I-V) characteristics in multifilamentary Ag/Bi2223 tapes are investigated as a function of mechanical strain. As is well known, the critical current, Ic, in axially elongated tape remains almost constant up to a strain around 0.5%, then is followed by a sharp reduction. However, for larger elongations, a long tail in the Ic-strain curve is observed, i.e., around 20% of the initial Ic still remains even at 0.8% strain. The irreversible Ic reduction indicates that the degradation comes from the breakdown of superconducting filaments. However, it is observed that the rupture risk probability reduces as the strain is increased in the long tail. This anomaly suggests that the measured strain of the whole tape is not identical to that of the HTS filaments inside the tape. We propose a model to describe the mechanical properties of the tape. It is shown that (1) the breakdown probability of the filaments is well described by the Weibull function if we calculate the influence of shearing between the superconducting filaments and the surrounding Ag sheath, (2) the Ic-strain properties can be described accurately by the model, (3) transport I-V characteristics can also be described simultaneously as a function of strain

AB - Current-voltage (I-V) characteristics in multifilamentary Ag/Bi2223 tapes are investigated as a function of mechanical strain. As is well known, the critical current, Ic, in axially elongated tape remains almost constant up to a strain around 0.5%, then is followed by a sharp reduction. However, for larger elongations, a long tail in the Ic-strain curve is observed, i.e., around 20% of the initial Ic still remains even at 0.8% strain. The irreversible Ic reduction indicates that the degradation comes from the breakdown of superconducting filaments. However, it is observed that the rupture risk probability reduces as the strain is increased in the long tail. This anomaly suggests that the measured strain of the whole tape is not identical to that of the HTS filaments inside the tape. We propose a model to describe the mechanical properties of the tape. It is shown that (1) the breakdown probability of the filaments is well described by the Weibull function if we calculate the influence of shearing between the superconducting filaments and the surrounding Ag sheath, (2) the Ic-strain properties can be described accurately by the model, (3) transport I-V characteristics can also be described simultaneously as a function of strain

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