欢迎登录材料期刊网

材料期刊网

高级检索

采用先位法将MgB2粉装入纯铁管中,制备出MgB2/Fe超导线材.用X射线衍射仪和扫描电子显微镜分析了样品的物相组成和显微结构;用SQUID测量了样品的超导转变温度;用标准四引线法测量了短样的临界电流.结果显示,超导样品的临界转变温度约为38.3 K,在4.2 K/4 T下MgB2/Fe线材的临界电流密度为~104A/cm2.研究结果表明,高温退火有效地减少了冷加工过程中产生的应力,改善了晶粒连接性,提高了芯材的致密度,可以显著地提高先位法制备线材的临界电流密度.

参考文献

[1] J Nagamatsu;N Nakagawa;T Muranlka;Y Zenitanim J Akimitzu .[J].Nature,2001,410:63.
[2] 闻海虎.新型超导体二硼化镁(MgB2)基础研究及其应用展望[J].物理,2003(05):325-326.
[3] B A Glowacki;M Majoros;M Vickers .Superconductivity of powder-in-tube MgB_2 wires[J].Superconductor Science & Technology,2001(4):193-199.
[4] G Grasso;A Malagoli;C Ferdeghini;S Roncallo,V Braccini,M R Cimberle A S Siri .[J].Applied Physics Letters,2001,79:230.
[5] W Goldacker;S I Schlachter;S Zimmer .High transport currents in mechanically reinforced MgB_2 wires[J].Superconductor Science & Technology,2001(9):787-793.
[6] C R M Grovenor;L Goodsir;C J Salter .Interfacial reactions and oxygen distribution in MgB_2 wires in Fe, stainless steel and Nb sheaths[J].Superconductor Science & Technology,2004(3):479-484.
[7] R Flukiger;P Lezza;C Beneduce;N Musolino and H L Suo .[J].Supercord Sci Technol,2003,16:264.
[8] 浦其荣,许高杰,王关生,刘应玲,丁泽军,孙霞.热处理条件对MgB2带材物理性能的影响[J].低温物理学报,2005(z1):903-907.
[9] H Takano;A Kanno;M Takahashi;S Murayama .[J].PHYSICA C,2003,388-389:121.
[10] Y W Ma;X P Zhang;G Nishijima;K Watanabe,S Awaji X D Bai .[J].Applied Physics Letters,2006,88:72502.
[11] E Martinez;L A Angurel;R Navarro .Study of Ag and Cu/MgB_2 powder-in-tube composite wires fabricated by in situ reaction at low temperatures[J].Superconductor Science & Technology,2002(7):1043-1047.
[12] S X Dou;A V Pan;S Zhou;M Ionescu,H K Liu P R Munroe .[J].Superconductor Science and Technology,2002,15:1587.
[13] E W Collings;E Lee;M D Sumption;M Tomsic,X L Wang,S Soltanian S X Dou .[J].Physica C,2003,386:555.
[14] 冯勇,闫果,张平祥,周廉.实用化MgB2超导材料研究进展[J].低温物理学报,2005(z1):819-823.
[15] T Nakane;H Kitaguchi;H Kumakura .[J].Applied Physics Letters,2006,88:22513.
[16] 索红莉,王颖,马红霞,刘丹敏,周美玲,Paola Lezza,Rene Flukiger.MgB2/Fe带材Jc的各向异性及MgB2芯织构和成分不均一性的研究[J].低温物理学报,2005(z1):738-744.
[17] P Lezza;V Abachedi;N Clayton;C Senatore,D Uglietti,H L Suo R Flukiger .[J].PHYSICA C,2004,401:305.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%