Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (2): 300-304.DOI: 10.12068/j.issn.1005-3026.2016.02.031

• 物理学 • Previous Articles    

Properties of Powder-in-Tube Nb3Al Superconductor Wire Prepared Using RHQT Method

CHEN Chuan1, BAI Zhi-ming2, ZHANG Ping-xiang1,3   

  1. 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.
  • Received:2015-09-13 Revised:2015-09-13 Online:2016-02-15 Published:2016-02-18
  • Contact: BAI Zhi-ming
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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.

Key words: rapid heating/quenching and transformation(RHQT), superconductor wire, Nb3Al, powder-in-tube(PIT), critical current, critical temperature

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