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Superconducting In Situ/Post In Situ MgB(2) Joints

The superconducting joints of superconducting in situ MgB(2) wires have been of great interest since the first MgB(2) wires were manufactured. The necessity of joining fully reacted wires in applications such as NMR brings complexity to the methodology of connecting already reacted wires sintered un...

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Detalles Bibliográficos
Autor principal: Glowacki, Bartlomiej Andrzej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10574634/
https://www.ncbi.nlm.nih.gov/pubmed/37834725
http://dx.doi.org/10.3390/ma16196588
Descripción
Sumario:The superconducting joints of superconducting in situ MgB(2) wires have been of great interest since the first MgB(2) wires were manufactured. The necessity of joining fully reacted wires in applications such as NMR brings complexity to the methodology of connecting already reacted wires sintered under optimised conditions via a mixture of Mg + 2B and subsequential second heat treatment to establish fully superconducting MgB(2) joints. Some of the data in the literature resolved such a procedure by applying high cold pressure and sintering at a low temperature. A topical review publication did not address in depth the question of whether cold sintering is a potential solution, suggesting that hot pressing is the way forward. In this paper, we discuss the potential joint interfacial requirements, suggesting a thermo-mechanical procedure to successfully form a superconductive connection of two in situ reacted wires in the presence of Mg + 2B flux. The critical current at 25 K of the researched junction achieved 50% I(c) for an individual in situ wire.