Phase formation and superconducting properties of mechanically alloyed Nb-3(Al1-xGex) system

作者：Li, Pingyuan; Chen, Yongliang; Xu, Liyuan; Zhang, Yun; Pan, Xifeng; Yan, Guo; Zhang, Yong; Cheng, C. H.; Feng, Yong; Zhao, Yong^*

来源：Superconductor Science and Technology, 2016, 29(7): 075001.

DOI：10.1088/0953-2048/29/7/075001

• Nb-3(Al1-xGex)
• high-energy ball milling
• superconductivity
• critical current density

Mechanically alloyed Nb-3(Al1-xGex) compounds with nominal composition x = 0%, 10%, 15%, 20%, 25% and 30% were synthesized using high-energy ball milling. The effects of Ge content and sintering temperature on the formation of the Nb3Al superconducting phase at a relatively low temperature without the extremely high-temperature rapid heating, quenching and transformation process were studied. The results revealed that Ge doping in Nb3Al improved the formation of the A15 phase at low temperatures, enhanced the superconducting transition temperature (T-c), and refined the grain structure, thus improving the overall superconducting properties. The pinning behavior was also studied for the optimized sample.

• 出版日期2016-7
• 单位西南交通大学