Improvement in the Crystallographic Phase Content and Superconducting Properties of Mechanically Alloyed MgB 2

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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this paper, the results of the superconductivity evaluation of MgB 2 intermetallic-based superconducting materials prepared through mechanical alloying are reported. The formation of the MgB 2 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 MgB 2 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 Fe 2 B. 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
JournalJournal of Superconductivity and Novel Magnetism
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

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

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