Phase formation and superconducting properties of mechanically alloyed Nb3(Al1−xGex) system
Phase formation and superconducting properties of mechanically alloyed Nb3(Al1−xGex) system
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DOI：
10.1088/0953-2048/29/7/075001
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发表时间：
2016-05
影响因子：
3.6
通讯作者：
Pingyuan Li;Yongliang Chen;Liyuan Xu;Yun Zhang;X. Pan;G. Yan;Yong Zhang;C. H. Cheng;
中科院分区：
文献类型：
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作者：
Pingyuan Li;Yongliang Chen;Liyuan Xu;Yun Zhang;X. Pan;G. Yan;Yong Zhang;C. H. Cheng;
采用高能球磨法合成了名义成分x = 0%、10%、15%、20%、25%和30%的机械合金化Nb3（Al1−xGex）化合物。研究了Ge含量和烧结温度对Nb3Al超导相形成的影响。结果表明，Ge掺杂改善了Nb3Al低温下A15相的形成，提高了超导转变温度（Tc），细化了晶粒结构，从而提高了整体超导性能。对优化样品的钉扎行为进行了研究。
Mechanically alloyed Nb3(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 (Tc), and refined the grain structure, thus improving the overall superconducting properties. The pinning behavior was also studied for the optimized sample.