Development in processing of MgB2 cryo-magnet superconductors

J. G. Noudem, M. Aburras, P. Bernstein, X. Chaud, M. Muralidhar, M. Murakami

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Abstract

Spark Plasma Sintering is a promising rapid consolidation technique that allows a better understanding and manipulating of sintering kinetics and therefore makes it possible to obtain MgB2-based ceramics with tailored microstructures. Commercial MgB2 powders were spark plasma sintered with an applied mechanical pressure, leading to MgB2 pellets with 99% relative density. The obtained samples show a sharp superconducting transition with an onset at 38.5 K. The critical current density was measured equal to 5.6 × 104 A/cm2 at 20 K under 1 T applied field. Otherwise, the trapped field was also investigated. A 5 mm thick pellet with a 20 mm diameter prepared with optimized processing temperature demonstrated a trapped field of 1.2 T at 15 K and up to 2.5 T at 10 K.

Original languageEnglish
Article number163916
JournalJournal of Applied Physics
Volume116
Issue number16
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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