Preparation and characterization of superconducting MgB2 rods

✍ Scribed by N. Orlińska; A. Zaleski; J. M. Paszula; Z. Wokulski

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 227 KB
• Volume: 42
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200711016

✦ Synopsis

Superconducting Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods were prepared through the ex-situ modified PIT technique with explosive consolidation method. The phase composition, microstructural features were investigated by X-ray diffraction and scanning electron microscope. The AC susceptibility for a core samples was measured by the AC susceptometry. Measurements of the magnetization hysteresis loops were also carried out. It is found that no impurity phase was formed in MgB 2 rods. In addition, it was found that grains in both Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods are densely packed. The magnetic measurements show that the critical temperature of Cu/Fe/MgB 2 and Steel/Cu/MgB 2 rods is 37.7 K and 37.6 K, respectively. The high critical current density of 9.22 × 10 5 A/cm 2 (4.1 K, 0.2 T) was obtained for Steel/Cu/MgB 2 rod.