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
  • [11] Effect of high-energy ball milling time on superconducting properties of MgB2 with low purity boron powder
    Wang, Chengduo
    Ma, Yanwei
    Zhang, Xianping
    Wang, Dongliang
    Gao, Zhaoshun
    Yao, Chao
    Wang, Chunlei
    Oguro, Hidetoshi
    Awaji, Satoshi
    Watanabe, Kazuo
    SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2012, 25 (03):
  • [12] Effect of Boron powder purity on superconducting properties of bulk MgB2
    Xu, Xun
    dos Santos, Dayse I.
    Kim, J. H.
    Yeoh, W. K.
    Qin, M. J.
    Konstantinov, K.
    Dou, S. X.
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2007, 460 : 602 - 603
  • [13] Effect of boron purity on superconducting properties of SiC doped MgB2
    Bo Qu
    Sun, Xudong
    Xiu, Zhimeng
    Kim, Jung Ho
    Dou, Shixue
    Liu, Yinong
    Kai Duan
    STRUCTURAL INTEGRITY AND FAILURE, 2008, 41-42 : 253 - +
  • [14] Influence of ball-milled amorphous B powders on the sintering process and superconductive properties of MgB2
    Ma, Zongqing
    Liu, Yongchang
    Huo, Jie
    SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2009, 22 (12):
  • [15] A correlation between transport current density and grain connectivity in MgB2/Fe wire made from ball-milled boron
    Xu, X.
    Kim, J. H.
    Dou, S. X.
    Choi, S.
    Lee, J. H.
    Park, H. W.
    Rindfleish, M.
    Tomsic, M.
    JOURNAL OF APPLIED PHYSICS, 2009, 105 (10)
  • [16] Microstructural Characteristics of Ball-Milled Self-Sintered Ex Situ MgB2 Bulks
    Shimada, Yusuke
    Hata, Satoshi
    Ikeda, Ken-ichi
    Nakashima, Hideharu
    Matsumura, Syo
    Tanaka, Hiroya
    Yamamoto, Akiyasu
    Shimoyama, Jun-ichi
    Kishio, Kohji
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2015, 25 (03)
  • [17] Optimization of Phase Formation and Superconducting Properties in MgB2 Prepared by Phase Transformation from MgB4
    Tan, K. L.
    Tan, K. Y.
    Lim, K. P.
    Shaari, A. H.
    Chen, S. K.
    JOURNAL OF ELECTRONIC MATERIALS, 2012, 41 (04) : 673 - 678
  • [18] Optimization of Phase Formation and Superconducting Properties in MgB2 Prepared by Phase Transformation from MgB4
    K. L. Tan
    K. Y. Tan
    K. P. Lim
    A. H. Shaari
    S. K. Chen
    Journal of Electronic Materials, 2012, 41 : 673 - 678
  • [19] Refinement and carbon incorporation effects on the superconducting properties of MgB2 through wet milling process of low purity boron powder
    Jun, Byung-Hyuk
    Park, Soon-Dong
    Kim, Chan-Joong
    JOURNAL OF ALLOYS AND COMPOUNDS, 2012, 535 : 27 - 32
  • [20] Boron isotope effect in superconducting MgB2
    Bud'ko, SL
    Lapertot, G
    Petrovic, C
    Cunningham, CE
    Anderson, N
    Canfield, PC
    PHYSICAL REVIEW LETTERS, 2001, 86 (09) : 1877 - 1880
12345