What is it about?

At present, NbTi and Nb3Sn superconductors are the only two materials used for high field applications. There is a need for new superconducting materials alternate to Nb based materials for the following reasons: (1) The demand for the superconducting magnets will increase many fold once the ITER project is successfully completed. (2) Nb is not a good material to use in neutron environment.

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Why is it important?

The ZrV2 based alloys alloys have high critical current density, however, they are mechanical weak. If we have to use these materials for high field applications, we have to increase their mechanical strength and ductility. In this direction, we have prepared the V-Zr alloys to study the correlation between the alloy formation and the critical current density.


While analyzing the results, I was surprised to see eutectic like reaction even in the alloys with 5% of Zr in Vanadium, whereas, the equilibrium phase diagram shows that the eutectic reaction is observed only when Zr content is more than 33%. We could able to show that the origin of high critical current density in ZrV2 alloys to eutectic microstructure.

sharath chandra L S
Raja Ramanna Centre for Advanced Technology

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This page is a summary of: Structural and magnetic properties of the as-cast V1−xZrx alloy superconductors, Journal of Applied Physics, November 2019, American Institute of Physics, DOI: 10.1063/1.5121184.
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