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In DC and AC practical applications of MgB2 superconducting wires animportant role is represented by the material sheath which has to provide,among other things, a suitable electrical and thermal stabilization. A way toobtain a large enough amount of low resistivity material in to the conductorarchitecture is to use it as external sheath. In this paper we study ex-situmultifilamentary MgB2 wires using oxide-dispersion-strengthened copper(GlidCop) as external sheath in order to reach a good compromise betweencritical current density and thermal properties. We prepared three GlidCopsamples differing by the content of dispersed sub-microscopic Al2O3 particles.We characterized the superconducting and thermal properties and we showed thatthe good thermal conductivity together the good mechanical properties and areasonable critical current density make of GlidCop composite wire a usefulconductor for applications where high thermal conductivity is request attemperature above 30K, such as Superconducting-FCL.

Superconducting and thermal properties of ex-situ Glidcop sheathed multifilamentary MgB2 wires