High-field thermal transport properties of REBCO coated conductors

Abstract

The use of REBCO coated conductors is envisaged for many applications, extending from power cables to high-field magnets. Whatever the case, thermal properties of REBCO tapes play a key role for the stability of superconducting devices. In this work, we present the first study on the longitudinal thermal conductivity ($\kappa$) of REBCO coated conductors in magnetic fields up to 19 T applied both parallelly and perpendicularly to the thermal-current direction. Copper-stabilized tapes from six industrial manufacturers have been investigated. We show that zero-field $\kappa$ of coated conductors can be calculated with an accuracy of $\pm 15$ from the residual resistivity ratio of the stabilizer and the Cu/non-Cu ratio. Measurements performed at high fields have allowed us to evaluate the consistency of the procedures generally used for estimating in-field $\kappa$ in the framework of the Wiedemann-Franz law from an electrical characterization of the materials. In-field data are intended to provide primary ingredients for the thermal stability analysis of high-temperature superconductor-based magnets.

arXiv commentAccepted for publication in Superconductor Science and Technology

References in corpus (2)

• Properties of recent IBAD-MOCVD Coated Conductors relevant to their high field, low temperature magnet use
• Thermal Conductivity of Industrial Nb3Sn Wires Fabricated by Various Techniques

Cited by in corpus (6)

• Electro-mechanical properties of REBCO coated conductors from various industrial manufacturers at 77 K, self-field and 4.2 K, 19 T
• Field and temperature scaling of the critical current density in commercial REBCO coated conductors
• Simulation of Stacks of High Temperature Superconducting Coated Conductors Magnetized by Pulsed Field Magnetization Using Controlled Magnetic Density Distribution Coils
• An equation for the quench propagation velocity valid for high field magnet use of REBCO coated conductors
• Transverse Thermal Conductivity of REBCO Coated Conductors
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