| Full text | |
| Author(s): |
Machado, João Paulo Barros
[1]
;
Rodrigues Junior, Durval
;
Rodrigues, Carlos A.
Total Authors: 3
|
| Affiliation: | [1] . Faculdade de Engenharia Química de Lorena (FAENQUIL). Departamento de Engenharia Química - Brasil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS; v. 408/410, p. 204-206, Aug. 2004. |
| Field of knowledge: | Physical Sciences and Mathematics - Physics |
| Abstract | |
Almost all large scale applications of superconductivity use metallic superconductors transporting high current in high magnetic fields. In this work, it was developed a (Nb,Ta)(3)Sn multifilamentary superconductor wire using the niobium tube and the internal tin methods. This conductor was projected to be used in a MagnetoHydroDynamic (MHD) energy generator system and it had 222 filaments of NbTa + Cu + Sn distributed in six regions, with Nb diffusion barriers around each one, and a central Cu rod. Several heat treatment profiles of diffusion and reaction of the Sn with the NbTa alloy were used. Microstructural and superconducting characterizations were made. The results showed that heat treatment that presented better critical current densities was 200 degreesC/50 h + 670 degreesC/ 100 h, leading to j(c) on the superconducting phase around 2800 A/mm(2) at 9 T. (AU) | |