Phase transformation and superconducting properties of MgB2 using ball-milled low purity boron

被引：0
|
作者：
Xu, X. [1 ]
Kim, J.H. [1 ]
Hossain, M.S.A. [1 ]
Park, J.S. [1 ]
Zhao, Y. [1 ]
Dou, S.X. [1 ]
Yeoh, W.K. [2 ]
Rindfleisch, M. [3 ]
Tomsic, M. [3 ]
机构：
[1] Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia
[2] IRC in Superconductivity, Department of Engineering, University of Cambridge, Madingley Road, Cambridge, CB3 0HE, United Kingdom
[3] Hyper Tech Research, Inc., 1275 Kinnear Road, Columbus, OH 43212, United States
来源：
Journal of Applied Physics | 2008年 / 103卷 / 02期
关键词：
MgB2 samples were prepared by using 96% boron (B) powder with strong crystalline phase that had been ball milled for various times. We observed samples that contained ball-milled 96% B in comparison with one made from as-supplied commercial 96% B; with the results showing a significant enhancement in the high field critical current density (Jc) due to small grain size and better reactivity. Specifically; many grain boundaries for MgB2 could be acting as strong flux pinning centers. Based on Rowell connectivity analysis; when the ball-milling time increased; the connectivity factor; described as the active cross-sectional area fraction (AF); was decreased. This implies that the intergrain connectivity became worse. These properties could lead to poor Jc in low field. However; the pinning force strength; Jc; 1/2; ×; B1/4; of samples using ball-milled 96% B is larger than that of the reference sample using commercial 96% B powder. These results accompany enhanced irreversibility (Hirr) and upper critical fields (Hc2). © 2008 American Institute of Physics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
相关论文
共 50 条
  • [1] Phase transformation and superconducting properties of MgB2 using ball-milled low purity boron
    Xu, X.
    Kim, J. H.
    Hossain, M. S. A.
    Park, J. S.
    Zhao, Y.
    Dou, S. X.
    Yeoh, W. K.
    Rindfleisch, M.
    Tomsic, M.
    JOURNAL OF APPLIED PHYSICS, 2008, 103 (02)
  • [2] Superconducting Properties of MgB2 Wire Using Ball-Milled Low Purity Boron
    Xu, Xun
    Kim, Jung Ho
    Zhang, Yun
    Zhao, Yue
    Rindfleisch, Matthew
    Tomsic, Michael
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2009, 19 (03) : 2714 - 2717
  • [3] Influence of ball-milled low purity boron powder on the superconductivity of MgB2
    Xu, X.
    Kim, J. H.
    Yeoh, W. K.
    Rindfleisch, A.
    Tomsic, A.
    dos Santos, Dayse I.
    Don, S. X.
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2007, 17 (02) : 2782 - 2785
  • [4] Superconducting properties of MgB2 prepared from attrition ball-milled boron powder
    Lee, J. H.
    Shin, S. Y.
    Kim, C. -J.
    Park, H. W.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 476 (1-2) : 919 - 924
  • [5] Superconducting properties of MgB2 prepared from attrition ball-milled boron powder
    Lee, J.H.
    Shin, S.Y.
    Kim, C.-J.
    Park, H.W.
    Journal of Alloys and Compounds, 2009, 476 (1-2): : 919 - 924
  • [6] Significant improvement of Jc in MgB2 bulk superconductor using ball-milled high-purity crystalline boron
    Zhang, Y.
    Xu, X.
    Zhao, Y.
    Kim, J. H.
    Lu, C.
    Zhou, S. H.
    Dou, S. X.
    SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2008, 21 (11):
  • [7] Enhanced superconducting properties in bulk MgB2 through spark plasma sintering of ball-milled and sieved crystalline boron
    Shadab, Malik
    Xing, Yiteng
    Noudem, Jacques
    Miryala, Muralidhar
    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2024, 35 (26)
  • [8] Superconducting Properties and Microstructure of Nanocrystalline MgB2 Bulk Prepared by Sintering of Ball-Milled Powders
    Yaxin Sun
    Longhui Zhu
    Xiumei Song
    Dongli Yu
    Yanguo Liu
    Journal of Superconductivity and Novel Magnetism, 2012, 25 : 1735 - 1741
  • [9] Superconducting Properties and Microstructure of Nanocrystalline MgB2 Bulk Prepared by Sintering of Ball-Milled Powders
    Sun, Yaxin
    Zhu, Longhui
    Song, Xiumei
    Yu, Dongli
    Liu, Yanguo
    JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2012, 25 (06) : 1735 - 1741
  • [10] Effect of boron powder purity on superconducting properties of MgB2
    Xu, Xun
    Qin, M. J.
    Konstantinov, K.
    dos Santos, Dayse I.
    Yeoh, W. K.
    Kim, J. H.
    Dou, S. X.
    SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (06): : 466 - 469
12345