EFFECTS of DUAL DOPING OF C AND TiC NANOPARTICLES ON SUPERCONDUCTING PROPERTIES OF Fe-SHEATHED MgB[sub 2] TAPES

Abstract

Fe-sheathed MgB 2 wires doped with C and TiC nanoparticles in the formula MgB 2-x C x + yTiC (x = 0, 0.05, 0.1, 0.15, 0.2, and y = 0, 2.5 wt.%, 5 wt.%) were investigated. Xray diffraction patterns indicate that the core materials in the wires contain small amount of Fe 2 B and MgO impurity phases, and the peaks shift with the variation of doping amount. It is found that the critical temperature T c decreases with the increase of doping amount. Strong in-field current carrying capability enhancement was observed on MgB 1.95 C 0.05 + 2.5 wt.% TiC .