摘要:
A method and apparatus are disclosed for the manufacture of a sheathed superconducting ceramic strip. The apparatus includes a chill wheel and metal casting apparatus wherein means are provided within the metal casting apparatus to cause oxygen to react with molten metal, comprising the base alloy from which a superconducting ceramic is formed, in a controlled manner. Strips of superconducting ceramic partially sheathed in the molten metal emerge from the metal casting apparatus and are engaged by the chill wheel, which solidifies the molten metal to form a continuous strip.
摘要:
A superconducting compound wire which comprises a plurality of strands having superconducting compound therein, a part or all of the strands having inclination to the lengthwise direction of the superconducting wire, and the strands being not substantially together with each other.
摘要:
A method of producing a superconducting strip, comprising continuously passing a superconducting wire or tape through a mold, casting a molten stabilizing metal for said wire into said mold, cooling the molten stabilizing metal during its passage through said mold along the travelling path of said wire with said wire embedded therein to thereby solidify said molten stabilizing metal in close contact with said wire and continuously drawing the resultant superconducting strip from said mold; and an apparatus for practicing said method. The superconducting strip produced according to the present invention is free from breakage of the wire, has highly uniform and excellent properties and can be produced at lower cost than the conventional ones.
摘要:
A process for incorporating a superconductive compound or compounds by fusion in a base metal having good electrical and heat conductive properties, such as copper, silver, aluminum, and the like. The process involves preparing a melt of the base metal and of the alloy components which combine to form the superconductive compound or compounds having a .beta.-W (A 15) structure. Then the melt is solidified at a cooling rate of at least 1000.degree. C./sec. whereby a ductile superconductive alloy is formed wherein the individual particles of the superconductive compounds are finely distributed in the base metal and are mutually spaced with respect to each other in such a way that the critical value for the tunnel effect is not exceeded.
摘要:
Disclosed is a method of forming a composite superconductive body comprising a porous glass matrix having a granular system of superconductive material disposed within the pores thereof. Adjacent grains of supercondcutive material are spatially separated but are electrically connected by electron tunneling. The critical field of these granular superconductors can be modified by processing either the porous glass matrix or the molten superconductor prior to impregnation of the superconductive material into the matrix.
摘要:
A method for manufacturing a multi-layer amorphous alloy having at least one layer of amorphous alloy, comprises the steps of ejecting a first molten metal on one of a pair of rollers rotating at a high speed, and rotating the ejected metal with the roller in a shape of a layer for rapid cooling; forming two molten metal layers on the rotating roller or belt by ejecting a second molten metal different from the first metal on the first molten metal for rapid cooling; and adhering under pressure and rolling the molten metal layers between the pair of rollers; and the method of the present invention is applicable to the manufacture of multi-layer alloys which may be used as various composite alloy materials such as high-sensitivity bimetals, superconductive wires, contact spring composite alloys, latching relays having two-stepped magnetic hysteresis, and high fidelty magnetic heads.
摘要:
A plurality of rods are assembled in a predetermined configuration to form a core which is surrounded by a molten matrix metal within a heated crucible. The temperature of the thusly charged crucible''s upper portion is maintained above the matrix metal''s melting point. In this respect, as the heat is applied to the top of the melt, the crucible is maintained in a hot environment while the bottom of the crucible is centrally chilled. In this manner the charge is solidified from the bottom toward the top so that the solidification progresses upwardly and outwardly in a conical pattern. After the controlled solidification is completed the casting is separated from the crucible to form a cored extrusion billet. In one embodiment the rods are separated from the casting and the resulting open holes are filled with superconductive material to form a composite superconductor extrusion billet. In another embodiment the rods themselves are made of a superconductive material so as to eliminate the step of separating the rods from the casting.
摘要:
A plurality of rods are assembled in a predetermined configuration to form a core which is surrounded by a molten matrix metal within a heated crucible. The temperature of the thusly charged crucible''s upper portion is maintained above the matrix metal''s melting point. In this respect, as the heat is applied to the top of the melt, the crucible is maintained in a hot environment while the bottom of the crucible is centrally chilled. In this manner the charge is solidified from the bottom toward the top so that the solidification progresses upwardly and outwardly in a conical pattern. After the controlled solidification is completed the casting is separated from the crucible to form a cored extrusion billet. In one embodiment the rods are separated from the casting and the resulting open holes are filled with superconductive material to form a composite superconductor extrusion billet. In another embodiment the rods themselves are made of a superconductive material so as to eliminate the step of separating the rods from the casting.
摘要:
Subject a heated, non-molten, intimate admixture of a base metal and a superconducting oxide material to pressure sufficient to form a densified article. The densified article is either superconducting as formed or capable of being rendered superconducting by annealing in the presence of oxygen. Depending upon the choice of materials the densified article is stable at temperatures up to 1000.degree. C.