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Full-Text Articles in Engineering
Magnetic Shielding In Mgb2/Fe Superconducting Wires, J. Horvat, Saeid Soltanian, Xiaolin Wang, S. X. Dou
Magnetic Shielding In Mgb2/Fe Superconducting Wires, J. Horvat, Saeid Soltanian, Xiaolin Wang, S. X. Dou
Faculty of Engineering - Papers (Archive)
Transport critical current (I/sub c/) was measured for MgB/sub 2//Fe round wires, with the magnetic field oriented perpendicular to the wire and parallel to it. Measurements were made on a wire with a pure MgB/sub 2/ core and another wire where the MgB/sub 2/ core was doped with nano-size SiC. This doping strongly improved the vortex pinning in MgB/sub 2/. The field dependence of I/sub c/ was strongly improved due to the presence of the iron sheath. At 30 K, I/sub c/ did not depend on the field for fields between 0.09 and 0.7 T. At lower temperatures, I/sub c/ …
Effect Of Grain Size And Doping Level Of Sic On The Superconductivity And Critical Current Density In Mgb/Sub 2/ Superconductor, Saeid Soltanian, Xiaolin Wang, J. Horvat, M. J. Qin, Hua-Kun Liu, P. R. Munroe, S. X. Dou
Effect Of Grain Size And Doping Level Of Sic On The Superconductivity And Critical Current Density In Mgb/Sub 2/ Superconductor, Saeid Soltanian, Xiaolin Wang, J. Horvat, M. J. Qin, Hua-Kun Liu, P. R. Munroe, S. X. Dou
Faculty of Engineering - Papers (Archive)
SiC doped MgB/sub 2/ polycrystalline samples were fabricated by in-situ reaction using different grain sizes (20 nm, 100 nm, and 37 /spl mu/m) of SiC and different doping levels (0, 8, 10, 12, 15 wt%). Phases, microstructures, superconductivity, critical current density and flux pinning have been systematically investigated using XRD, SEM, TEM, and magnetic measurements. Results show that grain sizes of the starting precursors of SiC have a strong effect on the critical current density and its field dependence. The smaller the SiC grains are, the better the J/sub c/ field performance is. Significant enhancement of J/sub c/ and the …