Study on the growth of Nb3Sn superconductor in Cu(Sn)/Nb diffusion couple

A. K. Kumar, T. Laurila, V. Vuorinen, A. Paul

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Nb3Sn growth following the bronze technique, (i.e. by interdiffusion between Cu(Sn) alloy (bronze) and Nb) is one of the important methodologies to produce this superconductor. In this study, we have addressed the confusion over the growth rate of the Nb3Sn phase. Furthermore, a possible explanation for the corrugated layer in the multifilamentary structure is discussed. Kirkendall marker experiments were conducted to study the relative mobilities of the species, which also explained the reason for finding pores in the product phase layer. Based on the parabolic growth constant at different temperatures, the activation energy for the growth is determined. We have further explained the dramatic increase in the growth rate of the product phase by changing just one atomic percentage of Sn in the Cu-Sn bronze alloy.

Original languageEnglish
Title of host publicationDefect and Diffusion Forum
PublisherTrans Tech Publications Ltd.
Number of pages5
ISBN (Print)3908451809, 9783908451808
Publication statusPublished - 2010
MoE publication typeA4 Article in a conference publication

Publication series

NameDefect and Diffusion Forum
ISSN (Print)10120386


  • Diffusion
  • Kirkendall pore
  • NbSn
  • Superconductor


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