Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (2): 208-212.DOI: 10.12068/j.issn.1005-3026.2015.02.012

• Materials & Metallurgy • Previous Articles     Next Articles

Fabrication of Nb3Al Superconductor by Mechanical Alloying

QI Ming1, PAN Xi-feng2, ZHANG Ping-xiang1,3, YAN Guo2   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. National Engineering Laboratory for Superconducting Materials, Western Superconducting Technologies Co., Ltd. , Xi’an 710018, China; 3. Superconducting Materials Research Lab, Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China.
  • Received:2013-12-26 Revised:2013-12-26 Online:2015-02-15 Published:2014-11-07
  • Contact: YAN Guo
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Abstract: By fabricating a series of different mechanical alloying Nb3Al bulks, the effects of milling time and annealing temperature on Nb3Al phase formation were investigated. X-ray diffraction, scanning electronic microscope and magnetic property measurment system were used to analyze the phase composition, microstructure and superconducting properties of the Nb3Al samples fabricated on different conditions. The results suggested that Nb-Al supersaturated solid solution was synthesized by mechanical alloying method as long as the stoichiometric elements powder was ball milled for 1h, and when the ball milling time was up to 10h, the blended powder would transform to amorphous phase. By optimizing the milling time and annealing temperature, single Nb3Al superconductor bulk was obtained successfully and its onset transition temperature was 15.3K.

Key words: Nb3Al, mechanical alloying, superconductor, milling time, annealing temperature, superconducting property

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