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Author:

Suo, Hong-Li (Suo, Hong-Li.) (Scholars:索红莉) | Wang, Ying (Wang, Ying.) | Ma, Hong-Xia (Ma, Hong-Xia.) | Liu, Min (Liu, Min.) | Zhao, Yue (Zhao, Yue.) | Ma, Lin (Ma, Lin.) | Li, Ya-Ming (Li, Ya-Ming.) | Zhang, Zi-Li (Zhang, Zi-Li.) | Zhou, Mei-Ling (Zhou, Mei-Ling.)

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Abstract:

The monofilamentary MgB2/Fe superconducting tapes were fabricated by an ex-situ PIT method. The quantitative phase analysis was carried out using X-ray diffraction and differential thermal analysis on short samples heat treated at 700, 850 and 920°C in vacuum, respectively. The reaction mechanism of MgB2 core during the process of the heat treatment was discussed. The impurity phase of MgO was found in all MgB2 cores and the largest amount was detected near the Fe sheath of the sample annealed at the highest temperature. MgB4 appeares in the inner part of MgB2 core, which is possibly formed by the decomposition of MgB2. A reaction layer (Fe2B) is observed between MgB2 core and Fe sheath, which is decomposed by Fe23B6. The result indicates that the presence of the oxygen inside sheath material is the main obstacle to the further improvement of the phase purity and homogeneity of the ex-situ PIT MgB2/Fe tapes.

Keyword:

Heat treatment Reaction kinetics X ray diffraction analysis Differential thermal analysis Superconducting tapes Phase composition Decomposition

Author Community:

  • [ 1 ] [Suo, Hong-Li]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 2 ] [Wang, Ying]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 3 ] [Ma, Hong-Xia]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 4 ] [Liu, Min]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 5 ] [Zhao, Yue]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 6 ] [Ma, Lin]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 7 ] [Li, Ya-Ming]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 8 ] [Zhang, Zi-Li]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 9 ] [Zhou, Mei-Ling]Key Laboratory of Advanced Functional Materials, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China

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Source :

Chinese Journal of Nonferrous Metals

ISSN: 1004-0609

Year: 2006

Issue: 10

Volume: 16

Page: 1698-1704

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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