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Internally oxidized Nb₃Sn strands with fine grain size and high critical current density
Xingchen Xu1, Michael D Sumption, Xuan Peng
1Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, USA.
Advanced Materials (Deerfield Beach, Fla.)
|January 14, 2015
Abstract:
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.
