MANUFACTURING METHOD OF NB3AL SUPERCONDUCTIVE WIRE ROD AND NB3AL SUPERCONDUCTIVE WIRE ROD OBTAINED BY THE METHOD

Japanese Patent JP3944573

B2

PROBLEM TO BE SOLVED: To provide a manufacturing method of an Nb3Al superconductive wire rod of a comparatively low cost, capable of manufacturing both round and straight angle wires and capable of further stabilizing superconductivity, and an Nb3Al superconductive wire rod obtained by the method.
SOLUTION: The Nb3Al extrafine multi-core superconductive wire rods are manufactured by (A) coating Cu or Ag as a stabilizing material, (B) applying a hot isotropic pressing (HIP) for not less than 10 minutes under an inactive gas atmosphere of a pressure of 40 atms or more, and (C) next, applying hot treatment for one to 200 hours at a temperature range of 680 to 850°C on the Nb3Al superconductive wire rod obtained by rapidly heating within two seconds up to a temperature range near 2,000°C and applying rapid heating and rapid cooling treatment at a speed of not less than 2,000°C/s down to a temperature range of 400°C or less to a precursor wire rod having an extrafine multi-core structure having a plurality of Nb/Al complex core materials buried in Nb, Ta, an Nb group thin alloy or a Ta group thin alloy as a matrix material.

Inoue Ren
Akihiro Kikuchi
Yasuo Iijima
Takao Takeuchi

JP2002374229A

July 11, 2007

December 25, 2002

Click for automatic bibliography generation  

National Institute for Materials Science

C22F1/00; H01B13/00; C22C27/02; C22F1/18; H01B1/00; H01B12/10; H01L39/24; (IPC1-7): H01B13/00; C22C27/02; H01B12/10; //C22F1/00

JP6223647A
JP4334822A
JP2000195349A
JP11102617A
JP200152547A
JP6283059A
JP200233025A
JP62278253A

Previous Patent: SUPERFINE PARTICLE AND METHOD FOR PRODUCING THE SAME

Next Patent: BRAN CONTENT MEASURING APPARATUS