Initial growth of tin on niobium for vapor diffusion coating of Nb3Sn

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dc.contributor.authorPudasaini, Uttaren
dc.contributor.authorEremeev, Grigory, V.en
dc.contributor.authorReece, Charles E.en
dc.contributor.authorTuggle, James Robert Jr.en
dc.contributor.authorKelley, Michael J.en
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.date.accessioned2019-08-13T18:31:29Zen
dc.date.available2019-08-13T18:31:29Zen
dc.date.issued2019-04en
dc.description.abstractNb3Sn offers significant potential to exceed the performance of niobium for superconducting radio frequency accelerator cavities. The most promising path toward deployment is by tin vapor diffusion coating of Nb cavity interiors via a two step nucleation-then-growth sequence. Reported here is a materials science study of the nucleation process. We manipulated the accessible range of process variables and determined the effect on composition and microstructure using an array of materials characterization tools. Broadly, nucleation deposits tin as a thin surface phase and, under some conditions, as near-micron sized particles as well, resembling Stranski-Krastanov growth. Conditions that impair nucleation promote the formation of defects, such as patches, in subsequent coating growth. Otherwise no significant effect on the subsequently grown coating was found for structures produced during nucleation.en
dc.description.notesPublic domain – authored by a U.S. government employeeen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1088/1361-6668/aafa88en
dc.identifier.eissn1361-6668en
dc.identifier.issn0953-2048en
dc.identifier.issue4en
dc.identifier.other45008en
dc.identifier.urihttp://hdl.handle.net/10919/93050en
dc.identifier.volume32en
dc.language.isoenen
dc.rightsCreative Commons CC0 1.0 Universal Public Domain Dedicationen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectNb3Snen
dc.subjectnucleationen
dc.subjectSRF cavityen
dc.subjectvapor diffusion coatingen
dc.subjectStranski-Krastanov growthen
dc.titleInitial growth of tin on niobium for vapor diffusion coating of Nb3Snen
dc.title.serialSuperconductor Science & Technologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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