| 转变法制备粉末套管Nb_3Al超导线材及其性能研究 |
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| 引用本文： | 陈传,白质明,张平祥.转变法制备粉末套管Nb_3Al超导线材及其性能研究[J].东北大学学报(自然科学版),2016,37(2):300-304. |
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| 作者姓名： | 陈传 白质明 张平祥 |
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| 作者单位： | (1.东北大学 材料科学与工程学院， 辽宁 沈阳 110819； 2.东北大学 理学院， 辽宁 沈阳 110819；3.西北有色金属研究院， 陕西 西安 710016) |
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| 基金项目： | 科技部国家磁约束核聚变能研究专项(2011GB112001)；自然科学基础研究计划——青年人才项目(2015JQ5154). |
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| 摘 要： | 使用自主研发的快热快冷处理设备,对粉末装管Nb/Al前驱线进行快热快冷处理,然后再经过800℃10 h转变退火处理,得到具有Nb3Al超导相的超导短样.通过扫描电镜观察分析超导样品微观结构,发现所有样品均有Nb3Al相存在,但在靠近Ta管内层有少量的Nb2Al相,超导芯内有少量的Nb剩余.在制冷机冷却的环境下使用四引线法测试了样品的超导性能.结果表明,自场下在10.9 K温度时,没有铜稳定体的Nb3Al超导线最高临界电流密度是66.5 A/mm2,超导起始转变温度是15~18 K.
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| 关 键 词： | 快热快冷转变法(RHQT) 超导线 Nb3Al 粉末装管 临界电流 临界温度 |
Properties of Powder-in-Tube Nb3 Al Superconductor Wire Prepared Using RHQT Method |
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| CHEN Chuan,BAI Zhi-ming,ZHANG Ping-xiang.Properties of Powder-in-Tube Nb3 Al Superconductor Wire Prepared Using RHQT Method[J].Journal of Northeastern University(Natural Science),2016,37(2):300-304. |
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| Authors: | CHEN Chuan BAI Zhi-ming ZHANG Ping-xiang |
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| Institution: | 1. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 2. School of Sciences， Northeastern University， Shenyang 110819， China; 3. Northwest Institute for Non-ferrous Metal Research， Xi’an 710016， China. |
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| Abstract: | A new apparatus was designed and fabricated for rapid heating and quenching of powder-in-tube (PIT) Nb/Al precursor. Short superconducting Nb3Al samples were obtained after transformation annealing at 800℃ for 10h. The SEM images indicated that the Nb3Al phase was well formed. However， small amount of Nb2Al exists near the Ta tube，while a few of Nb exists in the wire. Superconducting properties of the samples were studied by four probe method in cryocooler. The transport critical current density of the Nb3Al without Cu is 66.5A/mm2 at 10.9K in the self field， and the critical temperature is in the range of 15-18 K. |
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| Keywords: | rapid heating/quenching and transformation(RHQT) superconductor wire Nb3Al powder-in-tube(PIT) critical current critical temperature |
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