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

Journal Article · Sun Sep 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5061-0· OSTI ID:22922880

Yudanto, S. D. ^[1]; Dewi, Y. P. ^[2]; Imaduddin, A. ^[3]; Nakanishi, Y.; Yoshizawa, M. ^[4]; Kurniawan, B.

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1. Universitas Indonesia, Department of Physics (Indonesia)
2. Sepuluh Nopember Institute of Technology, Materials Department of Postgraduate Program (Indonesia)
3. Indonesian Institute of Sciences, Research Center for Metallurgy and Materials (Indonesia)
4. Iwate University, Graduate School of Arts and Science (Japan)

In this paper, the results of the superconductivity evaluation of MgB{sub 2} intermetallic-based superconducting materials prepared through mechanical alloying are reported. The formation of the MgB{sub 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{sub 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{sub 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).

• OSTI ID: 22922880
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 9 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CRITICAL TEMPERATURE
CRYSTALLOGRAPHY
INTERMETALLIC COMPOUNDS
IRON BORIDES
MAGNESIUM BORIDES
MAGNESIUM OXIDES
MASS
SUPERCONDUCTIVITY
SUPERCONDUCTORS