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

Pudasaini, Uttar; Eremeev, Grigory V.; Reece, Charles E.; Tuggle, James; Kelley, Michael J.

doi:10.1088/1361-6668/aafa88

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

Journal Article · 01 March 2019 · Superconductor Science and Technology

DOI: https://doi.org/10.1088/1361-6668/aafa88 · OSTI ID:1497698

Pudasaini, Uttar ^[1]; Eremeev, Grigory V. ^[2]; Reece, Charles E. ^[2]; Tuggle, James ^[3]; Kelley, Michael J. ^[4]

College of William and Mary, Williamsburg, VA (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Nb₃Sn 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. Furthermore no significant effect on the subsequently grown coating was found for structures produced during nucleation.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-06OR23177; SC0014475

OSTI ID:: 1497698

Report Number(s):: JLAB-ACC-18-2869; DOE/OR/23177-4583

Journal Information:: Superconductor Science and Technology, Vol. 32, Issue 4; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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References (17)

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Cited By (2)

Development and Understanding of Nb$_3$Sn films for radiofrequency applications through a sample-host 9-cell cavity Spina, T.; Tennis, B. M.; Lee, J. arXiv https://doi.org/10.48550/arxiv.2006.13407	text	January 2020
Properties of Nb3Sn films fabricated by magnetron sputtering from a single target Sayeed, Md. Nizam; Pudasaini, Uttar; Reece, Charles E. arXiv https://doi.org/10.48550/arxiv.2007.07103	text	January 2020

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36 MATERIALS SCIENCE
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nucleation
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Title: Initial growth of tin on niobium for vapor diffusion coating of Nb3Sn

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References (17)

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