Stock material or miscellaneous articles – All metal or with adjacent metals – Foil or filament smaller than 6 mils
Patent
1980-07-21
1982-07-13
Lesmes, George F.
Stock material or miscellaneous articles
All metal or with adjacent metals
Foil or filament smaller than 6 mils
428611, 428336, 428338, 428930, 148 3, 148403, 29599, 164429, 164433, 164437, 222593, 222591, 400901, B21C 3700, B22D 1106, B22D 1110, H01L 3924
Patent
active
043395082
ABSTRACT:
A method for manufacturing a thin and flexible ribbon of superconductor material such as V.sub.3 Sn, V.sub.3 Ge, V.sub.3 Si, Nb.sub.3 Sn, Nb.sub.3 Ge, Nb.sub.3 Si and La-Au having a fine and compact microscopic structure comprises heating raw superconductor material at a temperature within the range between its melting point and 300.degree. C. above the melting point to form a melt having suitable wettability and viscosity; ejecting the melt through a nozzle under a pressure within the range from 0.01 to 1.5 atm. against a cooling surface of a moving substrate such as a rotating drum; and cooling instantaneously and very rapidly a jet flow of the melt on the cooling surface at a cooling rate of 1,000.degree. C. to 1,000,000.degree. C./sec. In order to manufacture the thin elongated ribbon of excellent configuration it is preferable to effect the cooling in a reduced atmosphere. The invention also provides the thin and flexible ribbon processed by the above mentioned process. When an intermetallic compound such as Nb-Si, Nb-Sn, Nb-Ge, V-Si, V-Sn and V-Ge is used as the raw superconductor material a thin and flexible ribbon of superconductor material having essentially a crystalline structure is formed. When La.sub.1-x (Au.sub.y Cu.sub.1-y).sub.x, wherein x>0.9, 0.ltoreq.y.ltoreq.1 is used as the raw superconductor material it is possible to obtain a thin and flexible ribbon of superconductor material having essentially a fine and compact crystalline structure mixed with amorphous of 10 to 90%.
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Arai Ken-ichi
Tsuya Noboru
Lesmes George F.
Maeda Shiro
Thomas Alexander S.
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