Improvement in the Crystallographic Phase Content and Superconducting Properties of Mechanically Alloyed MgB2

S. D. Yudanto, Y. P. Dewi, A. Imaduddin, Y. Nakanishi, M. Yoshizawa, B. Kurniawan, A. Manaf

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In this paper, the results of the superconductivity evaluation of MgB2 intermetallic-based superconducting materials prepared through mechanical alloying are reported. The formation of the MgB2 intermetallic phase took place through an intermediate phase reaction at the solid-state reaction temperature, which tends to favor single-phase materials. The annealing of mechanically milled Mg and B powders resulted in the highest mass fraction of MgB2 observed in this study, reaching more than 90% after annealing at 900 °C for 1 h. At that point, there were still second phases present consisting of Mg, MgO, and Fe2B. Improved superconducting properties were obtained in samples sintered at temperatures of 850 °C and 900 °C that had a low resistivity, low critical temperature gap values, and a high residual resistivity ratio (RRR).

Original languageEnglish
Pages (from-to)2829-2835
Number of pages7
JournalJournal of Superconductivity and Novel Magnetism
Volume32
Issue number9
DOIs
Publication statusPublished - 1 Sept 2019

Keywords

  • Annealing
  • High-energy ball milling
  • MgB
  • Resistivity
  • Superconducting

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