Study of Structure, Composition and Electromagnetic Properties of High Levels of Zr-Doped REBa2Cu3O7-x Tapes Fabricated by Metal Organic Chemical Vapor Deposition

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dc.contributor.advisorSelvamanickam, Venkat
dc.contributor.committeeMemberArdebili, Haleh
dc.contributor.committeeMemberBao, Jiming
dc.contributor.committeeMemberRyou, Jae-Hyun
dc.creatorLiu, Yuhao 1987-
dc.date.accessioned2018-11-26T22:46:11Z
dc.date.available2018-11-26T22:46:11Z
dc.date.createdAugust 2013
dc.date.issued2013-08
dc.date.submittedAugust 2013
dc.date.updated2018-11-26T22:46:11Z
dc.description.abstractIn this thesis the critical currents (Ic), structural properties and composition variations of Zr-doped (Gd,Y)Ba2Cu3Ox (GdYBCO) superconducting tapes fabricated by metal organic chemical vapor deposition (MOCVD) were studied. By a modified MOCVD process, the self-field critical currents at 77K of GdYBCO with high Zr doping levels have been enhanced significantly. The in-field performances of critical currents of GdYBCO tapes with Zr-doping levels of 7.5-30 at.% were investigated up to 5 T over a temperature range of 40 K – 77 K. The tape with 20% Zr doping is found to have the highest minimum critical currents and the highest critical currents in orientation of the field perpendicular to the c-axis (H||c) over a wide range of temperatures and magnetic fields. The electromagnetic properties have been related to the microstructure changes. For finding out the optimal film composition with the best in-field performance at 30K, 3T, the influence of composition on in-field performance has also been studied.
dc.description.departmentMechanical Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10657/3397
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectHigh temperature superconductor
dc.subjectMOCVD
dc.subjectCoated conductors
dc.subjectFlux pinning
dc.subjectMicrostructure
dc.subjectComposition
dc.titleStudy of Structure, Composition and Electromagnetic Properties of High Levels of Zr-Doped REBa2Cu3O7-x Tapes Fabricated by Metal Organic Chemical Vapor Deposition
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentMechanical Engineering, Department of
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Mechanical Engineering

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