METHOD OF PRODUCING LAMINATED PANCAKE TYPE SUPERCONDUCTIVE MAGNETS

• US 3,813,764 A
• Filed: 01/18/1971
• Issued: 06/04/1974
• Est. Priority Date: 06/09/1969
• Status: Expired due to Term

• Current Assignee: Eihachiro Tanaka, Shoji Kuma, Takeji Fukuda, Tsutomu Yamashita, Yutaka Onodera
• Original Assignee: Eihachiro Tanaka, Shoji Kuma, Takeji Fukuda, Tsutomu Yamashita, Yutaka Onodera
• Inventors: Onodera, Yutaka, Yamashita, Tsutomu, Tanaka, Eihachiro, Fukuda, Takeji, Kuma, Shoji
• Primary Examiner(s): Lanham, Charles W.
• Assistant Examiner(s): Reiley, III, D. C.
• Application Number:
  US05/107,467
• Time in Patent Office: 1,233 Days
• Field of Search: 29/599,194 174/126CP,DIG.6 335/216
• US Class Current: 29/599
• CPC Class Codes: H01F 41/048 Superconductive coils
• CPC Class Codes: H01F 6/06 Coils, e.g. winding, insulating, terminating or casing arrangements therefor
• CPC Class Codes: H10N 60/0184 of devices comprising intermetallic compounds of type A-15, e.g. Nb3Sn
• CPC Class Codes: Y10S 174/24 in an inductive device, e.g. reactor, electromagnet
• CPC Class Codes: Y10S 174/32 having means for cooling
• CPC Class Codes: Y10S 428/928 Magnetic property
• CPC Class Codes: Y10S 428/93 Electric superconducting
• CPC Class Codes: Y10S 505/879 Magnet or electromagnet
• CPC Class Codes: Y10S 505/919 Reactive formation of superconducting intermetallic compound
• CPC Class Codes: Y10S 505/92 Utilizing diffusion barrier
• CPC Class Codes: Y10S 505/921 Metal working prior to treating
• CPC Class Codes: Y10S 505/924 Making superconductive magnet or coil
• CPC Class Codes: Y10T 29/49014 Superconductor
• CPC Class Codes: Y10T 29/49798 Dividing sequentially from leading end, e.g., by cutting or breaking
• CPC Class Codes: Y10T 428/12333 Helical or with helical component
• CPC Class Codes: Y10T 428/12743 Next to refractory [Group IVB, VB, or VIB] metal-base component
• CPC Class Codes: Y10T 428/12812 Diverse refractory group metal-base components: alternative to or next to each other
• CPC Class Codes: Y10T 428/12819 Group VB metal-base component

Abstract

A superconductive magnet comprises superconductive coiled layers; diffusion shielding coiled layers, between which the superconductive coiled layer is put; stabilizing conductor coiled layers, between which the diffusion shielding coiled layer is put; and a normal conductor acting as a superconductive insulation between the superconductive coiled layers. Said superconductive magnet is produced by laminating thin sheets of metal or alloy to constitute the superconductive material in such a ratio that a superconductive alloy or intermetallic compound is formed, superposing thin sheets of metal or alloy shielding diffusion against the former thin sheets and thin sheets of metal or alloy stabilizing the superconductivity on both the surfaces of the laminated sheets respectively, coiling the formed sheets on a core sheath in multilayer, covering the resulting coiled body with an outer sheath, subjecting the assembly to a diameter reducing treatment to adhere the layers and heating the adhered layers until the superconductive alloy or intermetallic compound is formed.

Claims

2. The method of claim 1 wherein said tubing is composed of copper and wherein said outer sheathing comprises a copper tube.

3. covering both sides of said second laminate with thin sheets composed of a conductive stabilizing material selected from the group consisting of Cu, Al and Ag to form a third laminate;

4. The method of claim 2 wherein said heat treatment is conducted at a temperature of from 600* to 1,050* C. for a sufficient period of time to form said superconductive alloy or compound.

5. covering the resulting wound material with an outer sheathing;

6. The method of claim 5 wherein said outer reinforcing case is composed of stainless steel.

7. subjecting the elongated product to a heat treatment at a temperature sufficient to form said superconductive alloy or compound, and

8. then cutting the elongated product into a plurality of very short lengths thereby producing said superconductive pancake type magnets.