Stock material or miscellaneous articles – All metal or with adjacent metals – Foil or filament smaller than 6 mils
Patent
1998-01-05
1999-04-27
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Foil or filament smaller than 6 mils
428614, 428655, 428661, 722531, B32B 1502, B21C 2324
Patent
active
058979638
ABSTRACT:
Disclosed Is a process for the fabrication of rare earth or rare earth alloy materials in the form of fine wires for refrigeration regenerator applications. The wire is a composite consisting of a metal core and a metal sheath. The core material is comprises of at least a 20 atomic percent portion of rare earth metal as a pure metal, an alloy with other rare earth metals, or an intermetallic compound alloy with one or more non rare earth metals. The sheath material is essentially immiscible with the rare earth in the core, has no magnetic phase transitions in the temperature range for the intended operation, and has good corrosion and oxidation resistance. The sheath material is typically a small portion of the total composite wire cross section. The composite wire is fabricated from the co-reduction of an assembled billet by conventional wire processing techniques.
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Composite Materials Technology, Inc.
Zimmerman John J.
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