Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/32838 |
| _version_ | 1811093421186613248 |
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| author | Vodhanel, Mark E |
| author2 | John B. Vander Sande. |
| author_facet | John B. Vander Sande. Vodhanel, Mark E |
| author_sort | Vodhanel, Mark E |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005. |
| first_indexed | 2024-09-23T15:44:47Z |
| format | Thesis |
| id | mit-1721.1/32838 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:44:47Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/328382019-04-10T10:30:34Z Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment Vodhanel, Mark E John B. Vander Sande. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of Physics. Physics. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005. In title on t.p., double-underscored "x" appears as subscript. Includes bibliographical references (leaf 40). The relation between processing, microstructure, and material property was investigated in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system. Experiments were based on a theoretical surface energy model proposing enhanced texture of the oxide at the Ag interface after melt-processing. Two classes of samples were processed and compared. Bi-2212 powder was deposited on a thin-foil Ag surface and was melt-processed to yield a 20 ± 10 micron-thick superconducting layer. A subset of these samples were processed with an additional Ag surface pneumatically pressed on top of the superconducting layer before heat treatment. Critical current density (...) measurements were performed in liquid helium and we obtained values ranging from 5,900-36,700 A/cm². A 3-6 fold increase in ..., for samples with the second Ag interface was observed. X-ray diffraction provided a technique for quantifying grain alignment via the Lotgering factor, and indicated samples with the upper Ag interface possess a higher degree of texturing. Our results support the interfacial energy model that a high degree of texture exists at the Ag surface, and provide clear evidence linking materials processing, superconducting grain alignment, and critical current density. Disparities observed in J for similarly processed samples were believed to be a consequence of local regions of alignment and the presence of impurities. by Mark E. Vodhanel. S.B. 2006-05-15T20:33:44Z 2006-05-15T20:33:44Z 2005 2005 Thesis http://hdl.handle.net/1721.1/32838 61356861 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 40 leaves 1556162 bytes 1555845 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Vodhanel, Mark E Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title | Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title_full | Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title_fullStr | Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title_full_unstemmed | Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title_short | Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment |
| title_sort | texture improvements in the high temperature superconducting bi₂sr₂ca₁cu₂oxi³ ag system via surface energy driven grain alignment |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/32838 |
| work_keys_str_mv | AT vodhanelmarke textureimprovementsinthehightemperaturesuperconductingbi2sr2ca1cu2oxi3agsystemviasurfaceenergydrivengrainalignment |