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Transport critical current density in Fe-sheathed nano-SiC doped MgB/sub 2/ wires

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posted on 2024-11-15, 10:31 authored by Shi DouShi Dou, Josip HorvatJosip Horvat, Saeid Soltanian, Xiaolin WangXiaolin Wang, M J Qin, S H Zhou, Hua LiuHua Liu, P G Munroe
The nano-SiC doped MgB/sub 2//Fe wires were fabricated using a powder-in-tube method and an in-situ reaction process. The depression of T/sub c/ with increasing SiC doping level remained rather small due to the counterbalanced effect of Si and C co-doping. The high level SiC co-doping allowed creation of the intra-grain defects and nano-inclusions, which act as effective pinning centers, resulting in a substantial enhancement in the J/sub c/(H) performance. The transport J/sub c/ for all the wires is comparable to the magnetic J/sub c/ at higher fields despite the low density of the samples and percolative nature of current. The transport I/sub c/ for the 10wt% SiC doped MgB/sub 2//Fe reached 660A at 5K and 4.5T (J/sub c/=133000A/cm/sup 2/) and 540A at 20K and 2T (J/sub c/=108000A/cm/sup 2/). The transport J/sub c/ for the 10wt% SiC doped MgB/sub 2/ wire is more than an order of magnitude higher than for the state-the-art Fe-sheathed MgB/sub 2/ wire reported to date at 5K and 10T and 20K and 5T respectively. There is a plenty of room for further improvement in J/sub c/ as the density of the current samples is only 50%.

History

Citation

This article was originally published as: Dou, SX, Horvat, J, Soltanian, S et al, Transport critical current density in Fe-sheathed nano-SiC doped MgB/sub 2/ wires, IEEE Transactions on Applied Superconductivity, June 2003, 13(2)3, 3199-3202. Copyright IEEE 2003.

Journal title

IEEE Transactions on Applied Superconductivity

Volume

13

Issue

2 III

Pagination

3199-3202

Language

English

RIS ID

9636

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