Electrochemical synthesis of NB-SN coatings for high field accelerator magnets

In this work of thesis the synthesis of Nb3Sn was studied exploiting electrodeposition techniques. Two di erent experimental approaches have been used: the rst with the aim of producing Nb3Sn phase by di usion from an electrodeposited Cu - Sn multilayer on a niobium substrate, while the second concentrates on the development of a fabrication technique to achieve the direct electrodeposition of the superconducting phase on a copper substrate exploiting di erent types of electrolytes. This would avoid the use of an expensive niobium substrate and enhance the superconductive behavior of the material by strengthening ux pinning at grain boundaries. Samples produced by di usion process were characterized by XRD, XRF and GDOES analysis, and their electrical behavior was studied. They have shown a superconductive behavior both in parallel and perpendicular magnetic eld, with maximum current densities measured at 12T of 600 A=mm2 and 736 A=mm2 respectively. The deposits from Ionic Liquid solution were also analyzed by XRD and XRF techniques, that have shown the presence of Nb3Sn in the deposit.