Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Shaping or consolidating
Patent
1993-09-22
1995-10-03
Fiorilla, Christopher A.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Shaping or consolidating
264 61, 419 10, 419 20, 419 21, 505500, B22F 312
Patent
active
054552257
ABSTRACT:
A method of producing a high-performance connection between a metal and a solid superconductive ceramic member is effected by introducing into a mold, in juxtaposition, grains or powder of the ceramic or of its precursors and a volume of silver or gold powder, and ceramic grains or powder at the level of an incorporated silver, gold or copper porous body of the foam, straw or lattice type prior to compression of the ceramic powder and sintering of the same. The electrical connection so formed exhibits a low electrical resistance capable of carrying high currents at rated temperature without interfering with the zero resistance state of the superconductive ceramic, with the metal connection free of cracking and having a contact resistance that is substantially constant throughout the range of superconductive material operating conditions.
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patent: 5179075 (1993-01-01), Leriche et al.
patent: 5284823 (1994-02-01), Chou et al.
IEEE Transactions on Magnetics, vol. 25, No. 2, Mar. 1989, New York, US, pp. 2056-2059; J. Moreland et al.: "Ag screen contacts to sintered Yba2Cu30x powder for rapid semiconductor characterization".
Applied Physics Letters, vol. 54, No. 25, Jun. 19, 1989, New York, USA, pp. 2605-2607; S. Jin et al: "Low-resistivity contacts to bulk high TC superconductors".
World Patent Index Latest, Derwent Publications Ltd., London, Great Britain, Week 8544 & JP-A-60186483 (Shinmeiwa Ind KK) Sep. 21, 1985. (abstract only).
Proceedings of the 21st Automotive Technology Development Contractors' Coordination Meeting Mar. 1984, Warrendale, Pa., pp. 223-229; A. J. Moorhead et al.: "Dispersed metal-toughened ceramics and ceramic brazing".
Duperray Ferard
Lempereur Simon
Fiorilla Christopher A.
GEC Alsthom SA
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