Otimização de fios supercontutores nanoestruturados de NB3SN com centros de aprisionamento artificiais de CU(SN)
A great number of the actual applications of the superconductivity uses metallic superconductors capableto transport high current densities. The optimization of the flux pinning in these conductors is extremelyimportant to increase the critical density current. The design of the microstructure proje...
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| Main Authors: | , , , |
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| Format: | Online |
| Language: | Portuguese |
| Published: |
Universidade Estadual de Campinas
2008
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| Subjects: | |
| Online Access: | https://econtents.sbu.unicamp.br/inpec/index.php/physicae/article/view/13411 |
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| Summary: | A great number of the actual applications of the superconductivity uses metallic superconductors capableto transport high current densities. The optimization of the flux pinning in these conductors is extremelyimportant to increase the critical density current. The design of the microstructure projected to serve aspinning centers has been presented as one highly promising technique for the optimization of thetransport properties of these materials [1]. However, due to the nanometric dimensions of these artificialpinning centers, the profiles of heat treatment used for the reaction and formation of the superconductingphase must be analyzed carefully, considering the distinct distributions and compositions of thecomposites (pinning centers + superconducting phase), in comparison with the conventional materials[2]. In the present work, the objective is to get a methodology for optimization of the heat treatmentsprofile of diffusion, reaction and formation of the superconducting phases in materials with pinningcenters in nanometric scale. The distribution and the composition of the pinning centers inside of thesuperconducting phase were determined by MEV-FEG and MEV+EDS, respectively. The results ofpinning force Fp, and the maximum critical current density that the superconductor can support weremeasured under the influence of an applied magnetic field. |
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| ISSN: | 1679-9569 |
