Effect of Interim Annealing on Mechanical Strength of TFA-MOD Derived YBCO Coated Conductors

Y. Takagi, K. Nakaoka, T. Nakamura, M. Yoshizumi, Takanobu Kiss, T. Izumi, Y. Shiohara

研究成果: ジャーナルへの寄稿Conference article

6 引用 (Scopus)

抄録

TFA-MOD derived YBCO tapes are expected for many applications due to cost-efficiency. In some applications, uniformity and mechanical strength are required for tapes. A 205 m-long YBCO tape was fabricated with high and uniform Ic performance throughout the tape by adopting the interim annealing before the conversion process. The effect of the interim annealing on the crystal growth mechanism of YBCO has been studied focusing on the relationship between the interim annealing conditions and delamination, in this work. Delamination strength was evaluated in the samples prepared with and without interim annealing by the stud pull method. Measurements were carried out on 50 different points for each sample and the results were analyzed statistically. The difference between the two samples was remarkably seen in the delamination strength below 60 MPa. The conventionally annealed sample had more points with low delamination strength below 60 MPa than the interim annealed one. The cross sectional images of both samples observed by SEM showed that there were few pores within the interim annealed superconducting layer, although conventional superconducting layer had many pores. These results suggest that the pores within YBCO layer might be origins to be propagated for delamination at low strength.

元の言語英語
ページ(範囲)138-141
ページ数4
ジャーナルPhysics Procedia
58
DOI
出版物ステータス出版済み - 1 1 2014
イベント26th International Symposium on Superconductivity, ISS 2013 - Tokyo, 日本
継続期間: 11 18 201311 20 2013

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conductors
tapes
annealing
porosity
crystal growth
costs
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Effect of Interim Annealing on Mechanical Strength of TFA-MOD Derived YBCO Coated Conductors. / Takagi, Y.; Nakaoka, K.; Nakamura, T.; Yoshizumi, M.; Kiss, Takanobu; Izumi, T.; Shiohara, Y.

:: Physics Procedia, 巻 58, 01.01.2014, p. 138-141.

研究成果: ジャーナルへの寄稿Conference article

Takagi, Y, Nakaoka, K, Nakamura, T, Yoshizumi, M, Kiss, T, Izumi, T & Shiohara, Y 2014, 'Effect of Interim Annealing on Mechanical Strength of TFA-MOD Derived YBCO Coated Conductors', Physics Procedia, 巻. 58, pp. 138-141. https://doi.org/10.1016/j.phpro.2014.09.024
Takagi, Y. ; Nakaoka, K. ; Nakamura, T. ; Yoshizumi, M. ; Kiss, Takanobu ; Izumi, T. ; Shiohara, Y. / Effect of Interim Annealing on Mechanical Strength of TFA-MOD Derived YBCO Coated Conductors. :: Physics Procedia. 2014 ; 巻 58. pp. 138-141.
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AU - Kiss, Takanobu

AU - Izumi, T.

AU - Shiohara, Y.

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