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- W2912156237 abstract "The improved mechanical properties of the Ni-alloy reinforced Bi <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2-x</sub> Pb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> Sr <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> Ca <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> Cu <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>10-x</sub> (Bi-2223)-released on 2016 by the Sumitomo Electric Industries, Osaka, Japan, (HT-NX type)-renewed the interest on this material for high-field applications. Whether Bi-2223 can be preferred to other high-temperature superconductors for very-high-field magnets depends also on the solutions found to protect the coil in the case of quenches. A comprehensive study of the quench propagation requires information about the temperature and field dependence of the critical current (I <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> ), the thermal conductivity (κ) of the conductor, and the electrical resistivity of the normal matrix (ρ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>norm</sub> ). Most of these data are unavailable in the literature for the HT-NX tape. This paper intends to fill this gap, reporting the results of an extensive measurement campaign of its electrical and thermo-physical properties. We have found that I <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> decreases linearly with T in the investigated range of fields 1-19 T. The well-known magnetic hysteresis of I <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> (B) has been examined in detail. We have observed that the value of I <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> at a given field varies upon repeated I-V measurements, with a consequent reduction of the hysteresis amplitude. The longitudinal κ has been investigated in magnetic fields up to 19 T. ρ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>norm</sub> has been measured between 4.2 K and 300 K and a residual resistivity ratio of ~40 has been found. The experimental study of the I <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> (T,B) surface, of the thermal conduction properties κ(T,B), and of the matrix electrical resistivity ρ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>norm</sub> provides fundamental elements for a quench propagation study, which is critical in view of high-field applications of this conductor." @default.
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- W2912156237 date "2019-08-01" @default.
- W2912156237 modified "2023-09-27" @default.
- W2912156237 title "Electrical and Thermo-Physical Properties of Ni-Alloy Reinforced Bi-2223 Conductors" @default.
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- W2912156237 doi "https://doi.org/10.1109/tasc.2019.2892086" @default.
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