Improvement in the Crystallographic Phase Content and Superconducting Properties of Mechanically Alloyed MgB2
| Autor: | Budhy Kurniawan, Sigit Dwi Yudanto, Yoshiki Nakanishi, Yulia Puspa Dewi, Agung Imaduddin, Azwar Manaf, Masahito Yoshizawa |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Superconductivity Materials science Phase reaction Annealing (metallurgy) Intermetallic Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Residual resistivity Reaction temperature Electrical resistivity and conductivity 0103 physical sciences Composite material 010306 general physics Mass fraction |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 32:2829-2835 |
| ISSN: | 1557-1947 1557-1939 |
| Popis: | 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). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink