Microstructure and Superconducting Properties of V-Based Laves Phase Compound Multifilamentary Wires Synthesized by a Rapidly Heating and Quenching Process to Hf-Zr/V Composite

Journal Article · Fri Mar 31 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2192401· OSTI ID:20800183

Hishinuma, Y; Nishimura, A ^[1]; Kikuchi, A; Iijima, Y; Yoshida, Y; Takeuchi, T ^[2]; Inoue, K ^[3]

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1. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki, Gifu, 509-5292 (Japan)
2. National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki, 305-0047 (Japan)
3. Faculty of Engineering, University of Tokushima, 2-1, Minamijosanjima-cho, Tokushima, 770-8506 (Japan)

We have tried to study low activation superconducting materials of the many V-based compound superconductors, and selected the V based Laves phase (V2(Hf,Zr)) compound because of its high upper critical field (Hc2) exceeding 20 T, its neutron irradiation resistance, and its low activation in the fusion reactor compared with those of Nb-based A15 wires.The fabrication, microstructure and superconductivity of V2(Hf,Zr) multifilamentary wire synthesized by applying a rapidly-heating/quenching (RHQ) and annealing process to the simple precursor using pure Hf and Zr mixture powder and pure V tube matrix were investigated. We found that a thick reaction layer was formed between the powder mixture filament and V matrix after the RHQ treatment and then it was increased with an increment of heating energy. Offset Tc values of samples were raised by increasing heating energy, and maximum Tc values occurred at 8.3 K. The maximum Jc value was obtained for a sample of post-annealing at 600 deg. C for 10 h. Jc dependence on the magnetic field of the post-annealed samples was higher than that of the as-quenched sample, and the Hc2 value of the annealed sample was also improved compared to the as-quenched sample.

• OSTI ID: 20800183
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 824; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CRITICAL FIELD
FABRICATION
HAFNIUM COMPOUNDS
HEATING
LAVES PHASES
LAYERS
MICROSTRUCTURE
MIXTURES
POWDERS
PRECURSOR
PROCESSING
QUENCHING
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
VANADIUM COMPOUNDS
ZIRCONIUM COMPOUNDS