Development of (Nb,Ta)(3)Sn multifilamentary superconductor wire using a novel niobium tube and internal tin method for high current applications

Autor(es)

Machado, João Paulo Barros ^[1] ; Rodrigues Junior, Durval ; Rodrigues, Carlos A.

Afiliação do(s) autor(es)

^[1] . Faculdade de Engenharia Química de Lorena (FAENQUIL). Departamento de Engenharia Química - Brasil

• Tipo de documento: Artigo Científico
• Fonte: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS; v. 408/410, p. 204-206, Aug. 2004.
• Área do conhecimento: Ciências Exatas e da Terra - Física
• Assunto(s): Eletrodinâmica Supercondutividade Nióbio Estanho Cobre Tântalo

Resumo

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)

• Processo FAPESP: 00/10305-3 - Análise de aprisionamento de fluxo magnético em supercondutores de Nb3Sn com centros de aprisionamento artificiais de Cu(Sn) em escala nanométrica
• Beneficiário: Carlos Alberto Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 99/03129-5 - Desenvolvimento de supercondutor multifilamentar de (Nb,Ta) 3Sn para aplicação em sistema de geração de energia por magnetohidrodinâmica (MHD)
• Beneficiário: João Paulo Barros Machado
• Modalidade de apoio: Bolsas no Brasil - Mestrado