Metal treatment – Stock – Titanium – zirconium – or hafnium base
Patent
1993-05-25
1994-12-20
Roy, Upendra
Metal treatment
Stock
Titanium, zirconium, or hafnium base
148670, 420901, 505813, C22C 1400
Patent
active
053743202
ABSTRACT:
The present invention provides an Nb-Ti alloy type superconducting wire having a superconducting filament including a member made of Nb-Ti alloy and a pinning member made of Nb or Nb alloy having no superconducting properties under operating magnetic field, the Nb-Ti based alloy containing Ti in a content of 48 to 65% by weight and the superconducting filament containing Nb or an Nb alloy (A) in a ratio of 20 to 35% by volume. The present invention further provides an Nb-Ti alloy type superconducting wire having a superconducting filament including a member made of Nb-Ti alloy and a pinning member made of Ti or Ti alloy having a critical temperature lower than that of the Nb-Ti alloy and/or having no superconducting properties; the Nb-Ti based alloy containing Ti in a content of 25 to 45% by weight and the superconducting filament containing Ti or a Ti alloy in a ratio of 20 to 35% by volume.
REFERENCES:
patent: 4564564 (1986-01-01), Schuller et al.
patent: 5182176 (1993-01-01), Wong
patent: 5226947 (1993-07-01), Jablonski et al.
Heller et al. Jour. Less-Common Metals 24 (1971) 265.
L. R. Motowidlo et al., NbTi Superconductors with Artificial Pinning Centers, Advances in Cryogenic Engineering (Materials), vol. 36, pp. 311-316 (1990).
K. Yamafuji et al., Achievement of High Current Density in Nb-Ti Superconducting Multifilamentary Wires by Introducing Designed Artificial Pins, Cryogenics, vol. 31, pp. 431-438 (1991).
C. Meingast et al., Quantative Description of a High J.sub.c Nb-Ti Superconductor During Its Final Optimization Strain: I. Microstructure, T.sub.c 2, H.sub.c2, and Resistivity, Journal of Applied Physics, vol. 66, pp. 5962-5970 (1989).
Matsumoto Kaname
Miura Osuke
Tanaka Yasuzo
Yamada Kiyoshi
Roy Upendra
The Furukawa Electric Co. Ltd.
White John P.
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