Effect of Post-Heat Treatment on the Critical Current Density of Nb3Al Superconductor

被引:0
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作者
Ping-yuan Li
Xiao-lan Zhang
Da-wei Yang
Su-hua Yang
Xi-feng Pan
Guo Yan
Yong Zhang
Yong Feng
Yong Zhao
机构
[1] Southwest Jiaotong University,Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, Ministry of Education of China, Superconductivity and New Energy R&D Center
[2] National Engineering Laboratory for Superconducting Material,School of Materials Science and Engineering
[3] Western Superconducting Technologies (WST) Co.,undefined
[4] Ltd.,undefined
[5] University of New South Wales,undefined
关键词
Nb; Al; Post-heat treatment; Critical current densities;
D O I
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学科分类号
摘要
The achievement of stoichiometry is very important for Nb3Al superconductor with excellent properties. A rapid heating, quenching, and transformation method is efficient to achieve stoichiometric Nb3Al superconducting wires, and supersaturated solid solution phase was transformed to Nb3Al in the transformation process with a post-annealing temperature between 800° to 900 °C and for 10 h. X-ray diffraction analysis revealed that the Nb3Al wires were of pure Nb3Al phase with a superconducting transition temperature about 18 K. Experimental results further showed that superconducting transition width was narrowed by quenching process after post-annealing. For the typical samples, the Hc2(T) was determined from the onset transitions of the M–Tcurves under various applied fields and the Hc2(0) value was extrapolated to be about 35 T. A significantly high Jc value under a magnetic field up to 9 T and at 8 K was observed. The pinning behavior of the Nb3Al wires was also discussed.
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页码:1719 / 1723
页数:4
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