NDLI: A New Way to Measure the Thermal Conductance of the ReBCO/Substrate Interface in Coated Conductors

Content Provider	IEEE Xplore Digital Library
Author	Antognazza, L. Decroux, M. Badel, A. Abplanalp, M.
Copyright Year	2002
Abstract	In coated conductors (CC), the quality of the interface between the superconducting layer and the substrate is an important parameter especially for fault current limiter applications. Indeed, it influences the propagation velocity of the normal zone along the CC. We present a new way to measure the thermal conductance of the interface between two electrically isolated layers. The top layer is heated by an ac current and its temperature oscillation is recorded. A simple thermal model consisting of a heater, a substrate, and a thermal bath, all coupled by thermal conductances, was developed to simulate the temperature oscillation and to extract the interface thermal conductance. This model predicts that in a certain frequency range, the oscillation of the temperature is strongly influenced by the thermal conductance of the interface. Measurements performed on CC, produced by Theva, are well fitted by our model assuming a thermal conductance of 320 W/cm² K. This value is confirmed by measurements performed using a dc technique. We also present measurements on another coated conductor (produced by Superpower) having a different architecture, i.e., different interfaces between the superconducting layer and the substrate. These results are the only available values of the thermal conductance of the ReBCO/interface in coated conductors.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	9000604
Ending Page	9000604
Page Count	1
File Size	715027
File Format	PDF
ISSN	10518223
Volume Number	23
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal conductivity Temperature measurement Substrates Heating Current measurement Conductors Oscillators thermal conductance Coated conductors fault current limiter superconducting thin films
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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