002852704 001__ 2852704
002852704 003__ SzGeCERN
002852704 005__ 20230317202848.0
002852704 0247_ $$2DOI$$a10.3390/ma15010125
002852704 0248_ $$aoai:cds.cern.ch:2852704$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002852704 035__ $$9https://inspirehep.net/api/oai2d$$aoai:inspirehep.net:2637587$$d2023-03-16T14:55:37Z$$h2023-03-17T05:13:39Z$$mmarcxml
002852704 035__ $$9Inspire$$a2637587
002852704 041__ $$aeng
002852704 100__ $$aD'Auria, Vincenzo$$uPSI, Villigen
002852704 245__ $$9submitter$$aApplication of Copper Thermal Spraying for Electrical Joints between Superconducting Nb$_3$Sn Cables
002852704 260__ $$c2021
002852704 300__ $$a10 p
002852704 520__ $$9submitter$$aThis manuscript reports on the application of copper thermal spraying in the manufacturing process of an electrical connection between Nb3Sn cables for superconducting magnets of fusion reactors. The joint is realized through diffusion bonding of the sprayed coating of the two cables. The main requirement for such a connection is its electrical resistance, which must be below 1 nΩ at B = 8 T, I = 63.3 kA and T = 4.5 K. Micrographs of the joint prototype were taken to relate the joint resistance with its microstructure and to provide feedback on the manufacturing process. Optical microscopy (OM) was used to evaluate the grain size of the coating, presence of oxide phases and to analyze the jointed surfaces. Scanning electron microscopy (SEM) and, in particular, energy-dispersive X-ray spectroscopy (EDX) were used to confirm the elemental composition of specimens extracted from the prototype. It is shown that the copper coating has an oxide concentration of 40%. Despite this, the resistance of the prototype is 0.48 nΩ in operating conditions, as the oxides are in globular form. The contact ratio between the jointed surfaces is about 95%. In addition, residual resistivity ratio (RRR) measurements were carried out to quantify the electrical quality of the Cu coating.
002852704 540__ $$3publication$$aCC-BY-4.0$$uhttps://creativecommons.org/licenses/by/4.0/
002852704 542__ $$3publication$$dthe authors$$g2021
002852704 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002852704 690C_ $$aARTICLE
002852704 690C_ $$aCERN
002852704 700__ $$aBruzzone, Pierluigi$$uPSI, Villigen
002852704 700__ $$aMeyer, Mickael Sebastian$$uCERN
002852704 700__ $$aCastro, Enrique Rodriguez$$uCERN$$uCarlos III U., Madrid$$vCampus Leganes, University Carlos III of Madrid, Avenida Universidad 30, 28911 Madrid, Spain
002852704 700__ $$aSgobba, Stefano$$uCERN
002852704 773__ $$c125$$n1$$pMaterials$$v15$$y2021
002852704 8564_ $$82441243$$s14062931$$uhttp://cds.cern.ch/record/2852704/files/materials-15-00125 (1).pdf$$yFulltext
002852704 960__ $$a13
002852704 980__ $$aARTICLE