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Preparation method of Nb3Sn superconducting magnet with increased fracture resistance performance

A superconducting magnet, anti-fracture technology, used in the manufacture of superconducting magnets/coils, magnetic objects, inductors/transformers/magnets, etc. question

Active Publication Date: 2010-04-07
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintered superconducting coil is very brittle and easy to break, so it cannot be stretched to apply epoxy resin on the superconducting wire, but can only be applied on the outer surface of the coil, which will prevent the epoxy resin from fully penetrating into the surface of the coil. In the gap between the superconducting coils in the inner layer, the superconducting coils in the inner layer have poor insulation ability
When the magnet is excited, the innermost superconducting coil experiences the largest Lorentz force, and this part of the superconductor has the highest probability of motion. However, its surface is not sufficiently insulated, so it is prone to fracture

Method used

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  • Preparation method of Nb3Sn superconducting magnet with increased fracture resistance performance
  • Preparation method of Nb3Sn superconducting magnet with increased fracture resistance performance

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preparation example Construction

[0018] The present invention Nb 3 The preparation method of Sn superconducting magnet specifically implements according to the following three steps:

[0019] 1. Wash Nb with acetone 3 Sn superconducting coil, then Nb 3 Put the Sn superconducting coil into the vacuum chamber; and configure the epoxy resin.

[0020] 2. Degas the epoxy resin by heating and stirring. The heating temperature is 60°C-80°C, and then put the epoxy resin into the vacuum chamber. The pressure of the vacuum chamber is 2000Pa-3000Pa, and the epoxy resin is fully immersed. Nb 3 After 30 minutes of the Sn superconducting coil, nitrogen gas is passed into the vacuum chamber so that the pressure of the vacuum chamber is 1.5 to 2 atmospheres, and the epoxy resin is squeezed into the Nb through nitrogen gas. 3 For the inner layer of the coil of the Sn superconducting coil, the time is 5 to 10 hours.

[0021] 3. The Nb fully impregnated in the previous step 3 The Sn superconducting coil is taken out from ...

Embodiment 1

[0037] Wash Nb with acetone 3 Sn superconducting coil, then Nb 3 Put the Sn superconducting coil into the vacuum chamber; record by weight, respectively take 50 parts of unmodified low-viscosity resin, 50 parts of polyethylene glycol diepoxide resin, and 28 parts of aromatic amine hardener. Mix the unmodified low-viscosity resin and polyethylene glycol diepoxide resin to obtain a mixed resin, and then drop a silicon antiform fluid (Silicon Antiform fluid) with a viscosity of 100 lipoise in every kilogram of the mixed resin. ) drop, followed by stirring the mixed resin to degas the mixed resin to obtain a degassed resin. Then filter the obtained aromatic amine hardener through a small-hole filter, pour it into the degassed resin, and stir it at the same time to obtain an epoxy resin. The epoxy resin is degassed by heating and stirring, the heating temperature is 60°C, and then the epoxy resin is passed into the vacuum chamber, the pressure of the vacuum chamber is 2000Pa, and...

Embodiment 2

[0039] Wash Nb with acetone 3 Sn superconducting coil, then Nb 3 Put the Sn superconducting coil into the vacuum chamber; record by weight, respectively take 50 parts of unmodified low-viscosity resin, 50 parts of polyethylene glycol diepoxide resin, and 28 parts of aromatic amine hardener. Mix the unmodified low-viscosity resin and polyethylene glycol diepoxide resin to obtain a mixed resin, and then drop a silicon antiform fluid (Silicon Antiform fluid) with a viscosity of 200 lipoises in every kilogram of the mixed resin. ) drop, followed by stirring the mixed resin to degas the mixed resin to obtain a degassed resin. Then filter the obtained aromatic amine hardener through a small-hole filter, pour it into the degassed resin, and stir it at the same time to obtain an epoxy resin. The epoxy resin is degassed by heating and stirring, the heating temperature is 80°C, and then the epoxy resin is passed into the vacuum chamber, the pressure of the vacuum chamber is 3000Pa, an...

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Abstract

The invention discloses a preparation method of Nb3Sn superconducting magnet with increased fracture resistance performance. The method comprises the following steps: firstly fully soaking Nb3Sn superconducting coil in epoxy resin under vacuum atmosphere, then using nitrogen for pressurization to ensure that epoxy resin is fully soaked in the Nb3Sn superconducting coil and finally solidifying to obtain Nb3Sn superconducting coil. When using the Nb3Sn superconducting coils prepared by the method of the invention for excitation, as the Nb3Sn superconducting coils are completely insulated, the Nb3Sn superconducting coils can not fracture.

Description

technical field [0001] The invention belongs to the technical field of superconducting magnets, and relates to a Nb with improved fracture resistance performance 3 The preparation method of Sn superconducting magnet. Background technique [0002] The superconducting magnets used in the high field (8T ~ 16T) are basically Nb 3 Sn superconducting wire wound. The usual preparation method is to first Nb 3 The Sn superconducting wire is wound into a coil, then sintered, and finally epoxy resin is applied on the superconducting coil. Since epoxy resin cannot withstand high temperatures, it is not possible to apply epoxy resin to the superconducting coil before sintering. It can only be sintered and then coated with epoxy resin for insulation. However, the sintered superconducting coil is very brittle and easy to break, so it cannot be stretched to apply epoxy resin on the superconducting wire, but can only be applied on the outer surface of the coil, which will prevent the epo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/00H01F41/02
Inventor 朱思华高慧贤李建峰冯勇刘向宏张平祥
Owner 西部超导材料科技股份有限公司
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