Internally Oxidized Nb3Sn Strands with Fine Grain Size and High Critical Current Density

Internally Oxidized Nb3Sn Strands with Fine Grain Size and High Critical Current Density

Nb3Sn strands fabricated using Nb–Zr alloy can be internally oxidized, provided that oxygen is properly supplied via an oxide powder. This allows the formation of fine intragranular and intergranular ZrO2 particles in a Nb3Sn matrix. These particles can refine the grain size by a factor of three and...

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Veröffentlicht in:Advanced materials (Weinheim) 2015-02, Vol.27 (8), p.1346-1350
Hauptverfasser: Xu, Xingchen, Sumption, Michael D., Peng, Xuan
Format: Artikel
Sprache:eng
Schlagworte:
critical current density
grain size
internal oxidation
Nb3Sn superconductor
refinement
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Zusammenfassung:Nb3Sn strands fabricated using Nb–Zr alloy can be internally oxidized, provided that oxygen is properly supplied via an oxide powder. This allows the formation of fine intragranular and intergranular ZrO2 particles in a Nb3Sn matrix. These particles can refine the grain size by a factor of three and thereby greatly enhance the Nb3Sn critical current density.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201404335