多芯MgB2／NbZr／Cu线材的制备及性能研究  

Fabrication and Properties of Multifilamentary MgB_2/NbZr/Cu Wires

作　　者：闫果[1] 王庆阳[1] 刘国庆[1] 熊晓梅[1] 冯勇[1] A.Sulpice E.Mossang 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]Institut NEEL/CNRS-UJF,B.P.166,38042 Grenoble Cedex 9,France [3]LCMI/CNRS,B.P.166,38042 Grenoble Cedex 9,France

出　　处：《中国材料进展》2009年第4期23-27,共5页Materials China

基　　金：国家973计划项目(2006CB601004);国家自然科学基金(50752055)资助

摘　　要：采用NbZr/Cu复合管作为外包套材料,用粉末装管工艺(PIT)制备出千米级TiC掺杂的多芯MgB2/NbZr/Cu线材。在流动高纯氩气保护下、650～800℃温度区间内烧结2h。微观结构分析显示,该工艺制备的MgB2/NbZr/Cu线材具有良好的晶粒连结性和较高的致密度。采用标准的四引线法,在4.2K不同磁场下测试线材的临界电流密度,在10T时,线材临界电流密度Jc达到1.8×104A/cm2。Employing the powder-in-tube （PIT） method, muhifilament MgB2 wires doped with TiC were fabricated by using NbZr/Cu composite sheath. Short samples of MgB2/NbZr/Cu wires were sintered at 650℃ - 800 ℃ for 2 h in flowing high-purity argon. Mierostrueture observation of the wires showed that MgB2/NbZr/Cu wires had better grain connectivity and higher density. Critical current density （ J. ） of the wires was measured at 4. 2 K and 25 K in different magnetic fields by standard four-probe method. High J, values of 1.8×10^4 A/cm2 were obtained in 10 T at 4. 2 K for MgB2/NbZr/Cu wires. Keywords： muhifilament MgB2 wires; element doping; powder-in-tube; critical current

关 键 词：多芯MgB线材 元素掺杂 粉末装管法 临界电流密度 

分 类 号：TM26[一般工业技术—材料科学与工程]