Effects of the manufacturing process of MgB2 cables on the superconductor precursor material

R. LUCCAS; C. SOBRERO; M. GIORDANA; M.T. MALACHEVSKY; J. MALARRÍA

Natal

Workshop; 16th International Workshop on Vortex Matter; 2017

IIP-UFRN

Pinning of vortices is a eld of great interest for applications of superconductivity. The ability of avoiding vortex movement is directly related to avoiding dissipation of energy in the material. Natural and articial defects are able to work as pinning centers for vortices in superconductors. In that way, the study of different kind of defects like impurity inclusions, segregated phases or grain boundaries is important from an application point of view.In this work we present a study of the grain size of MgB2 as the precursor material for superconductor cables. We compared particles of the precursor before and after the groove roll processing and analyzed how microstructure changes in function of it. The role of the grain size and their possible consequences is also discussed. Cases for several congurations are compared.