The microstructure and properties of J-R Nb3Al superconducting wires fabricated by diffusion method at an intermediate temperature

29th International Symposium on Superconductivity

Lin, Wenjia^1 ; Xu, Liyuan^1 ; Zhang, Wenjie^1 ; Zheng, Liang^1 ; Yu, Zhou^1 ; Li, Pengyuan^2 ; Pan, Xifeng^2 ; Yan, Guo^2 ; Zhao, Yong^1,3 ; Zhang, Yong^1

Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, Ministry of Education of China, Superconductivity and New Energy RandD Center, Southwest Jiaotong University, Chengdu

610031, China^1

Western Superconducting Technoligies Co., Ltd., Xi'an

710018, China^2

School of Materials Science and Engineering, University of New South Wales, Sydney

NSW

2052, Australia^3

关键词: Heat treatment temperature;    Heat treatment time;    Intermediate temperatures;    Isothermal heat treatments;    Microstructure and properties;    Sintering temperature and time;    Superconducting properties;    Treatment temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012037/pdf
DOI  :  10.1088/1742-6596/871/1/012037

来源: IOP

【 摘 要 】

The precursor Nb-Al strands were fabricated by the method of Jelly-Roll. The effects of sintering temperature and time on the diffusion degree and superconducting property of the binary Nb-Al system were investigated under isothermal heat treatment at 1100-1500 °C. The results show that the Tc of superconducting wires increased with the heat-treatment temperature rising at the isothermal region. Excessive heat-treatment time led to the decrease of the properties of Nb3Al wires under a certain heat-treatment temperature. The magnetic analysis results showed that the optimal Tc of J-R Nb3Al wires was about 16.8 K at a teat-treatment temperature of 1500 °C for 3 h.