Enhancement of bending strain tolerance and current carrying property of MgB2 based multifilamentary wires

• Published in: Cryogenics (Guildford) Vol. 52; no. 12; pp. 767 - 770
• Main Authors: Thomas, Syju, Varghese, Neson, Rahul, S., Devadas, K.M., Vinod, K., Syamaprasad, U.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2012; Elsevier
• Subjects: Annealing; Applied sciences; Bending; Bending strain; Borides; Cryogenics; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Filaments; Magnesium compounds; MgB2; Multifilamentary wire; Refrigerating engineering. Cryogenics. Food conservation; Strain; Tolerances; Wire; Multifilamentary wire; MgB2; Bending strain; MgB; Critical current; Density; Cryogenics
• ISSN: 0011-2275; 1879-2235
• DOI: 10.1016/j.cryogenics.2012.07.007

► 4, 8 and 16 filamentary MgB2 wires with Fe barrier, Cu stabilizer and Ni sheath were prepared. ► Bending strain tolerance of annealed & bent wires increased with increase in number of filaments. ► Bent & annealed wires did not show much variation in critical current density from that of straight samples. The effect of bending strain on current carrying capacity of MgB2 multifilamentary wires was studied with 4, 8 and 16 multifilamentary wires. The critical current density (JC) of straight wires and bent wires with 5, 10, and 15cm diameter was measured. Both annealed & bent and bent & annealed wires were used for measurement. The JC of annealed & bent wires were found to decrease with decrease in bent diameter and the rate of degradation of JC decreased with increasing number of filaments, while bent & annealed wires almost retained its JC at all diameters studied.