Lightweight MgB2 wires, cables and coils for aircraft enginesTuesday (05.11.2019) 17:15 - 17:35 Part of:
Up to now, MgB2 phase is the lightest superconducting compound with only 2.5 gcm-3. The combination of MgB2 filaments with Ti-barriers and Al-stabilization sheath provides a wire with the minimal mass. But, pure Al is too soft to be used for the outer sheath of deformed composite wire. Therefore Al+Al2O3 material produced by powder metallurgy was utilized for single- and multi-core MgB2 wires, 12 strands Rutherford cables and also for wind and react coil self-insulated by Al2O3 layer created by anodic oxidation. Thin and high temperature resistant Al2O3 layer offers high space factor maximizing the current density of superconducting winding. High current densities and tolerance to axial stress have been obtained for MgB2/Ti/Al+Al2O3 wires. Such lightweight and high performance MgB2 conductors can be especially interesting for aircraft engines and any of space applications.