تقرير
An in-situ X-ray and neutron diffraction investigation of Bi-2212 in multifilamentary wires during thermal treatment
| العنوان: | An in-situ X-ray and neutron diffraction investigation of Bi-2212 in multifilamentary wires during thermal treatment |
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| المؤلفون: | Martinelli, Alberto, Bellingeri, Emilio, Leveratto, Alessandro, Leoncino, Luca, Ritter, Clemens, Malagoli, Andrea |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Significant insights for critical current density (Jc) improvement in Bi-2212 super- conductor wires can be obtained by an accurate analysis of the structural and mi- crostructural properties evolving during the so-called partial-melt process, a heat treatment needed to improve grain connectivity and therefore gain high Jc. Here, we report an in-situ analysis by means of synchrotron X-ray and neutron diffraction performed, for the first time, during the heat treatment carried out with the very same temperature profile and reacting oxygen atmosphere in which the Bi-2212 wires are usually treated for practical applications. The obtained results show the thermal evolution of the Bi-2212 structure, focusing in particular on texturing and secondary phases formation. The role of the oxygen is discussed as well. Hence, the present investigation marks a significant advance for the comprehension of the phenomena involved in the wire fabrication process and provides useful insights for the process optimization as well. Comment: to be published on Physical Review Materials |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1807.11366 |
| رقم الأكسشن: | edsarx.1807.11366 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |