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Title: Method of manufacturing a niobium-aluminum-germanium superconductive material

Abstract

A method for manufacturing flexible Nb.sub.3 (Al,Ge) multifilamentary superconductive material in which a sintered porous niobium compact is infiltrated with an aluminum-germanium alloy and thereafter deformed and heat treated in a series of steps at different successively higher temperatures preferably below 1000.degree. C. to produce filaments composed of Nb.sub.3 (Al,G3) within the compact. By avoiding temperatures in excess of 1000.degree. C. during the heat treatment, cladding material such as copper can be applied to facilitate a deformation step preceding the heat treatment and can remain in place through the heat treatment to also serve as a temperature stabilizer for supeconductive material produced. Further, these lower heat treatment temperatures favor formation of filaments with reduced grain size and, hence with more grain boundaries which in turn increase the current-carrying capacity of the superconductive material.

Inventors:
 [1];  [2];  [3]
  1. (San Francisco, CA)
  2. (Oakland, CA)
  3. (Redondo Beach, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
863654
Patent Number(s):
4223434
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; manufacturing; niobium-aluminum-germanium; superconductive; material; flexible; nb; multifilamentary; sintered; porous; niobium; compact; infiltrated; aluminum-germanium; alloy; thereafter; deformed; heat; treated; series; steps; successively; temperatures; preferably; below; 1000; degree; produce; filaments; composed; g3; avoiding; excess; treatment; cladding; copper; applied; facilitate; deformation; step; preceding; remain; serve; temperature; stabilizer; supeconductive; produced; favor; formation; reduced; grain; size; hence; boundaries; increase; current-carrying; capacity; material produced; grain boundaries; conductive material; grain size; heat treatment; heat treated; superconductive material; cladding material; carrying capacity; sintered porous; flexible nb; /29/148/419/428/505/

Citation Formats

Wang, John L., Pickus, Milton R., and Douglas, Kent E. Method of manufacturing a niobium-aluminum-germanium superconductive material. United States: N. p., 1980. Web.
Wang, John L., Pickus, Milton R., & Douglas, Kent E. Method of manufacturing a niobium-aluminum-germanium superconductive material. United States.
Wang, John L., Pickus, Milton R., and Douglas, Kent E. Tue . "Method of manufacturing a niobium-aluminum-germanium superconductive material". United States. https://www.osti.gov/servlets/purl/863654.
@article{osti_863654,
title = {Method of manufacturing a niobium-aluminum-germanium superconductive material},
author = {Wang, John L. and Pickus, Milton R. and Douglas, Kent E.},
abstractNote = {A method for manufacturing flexible Nb.sub.3 (Al,Ge) multifilamentary superconductive material in which a sintered porous niobium compact is infiltrated with an aluminum-germanium alloy and thereafter deformed and heat treated in a series of steps at different successively higher temperatures preferably below 1000.degree. C. to produce filaments composed of Nb.sub.3 (Al,G3) within the compact. By avoiding temperatures in excess of 1000.degree. C. during the heat treatment, cladding material such as copper can be applied to facilitate a deformation step preceding the heat treatment and can remain in place through the heat treatment to also serve as a temperature stabilizer for supeconductive material produced. Further, these lower heat treatment temperatures favor formation of filaments with reduced grain size and, hence with more grain boundaries which in turn increase the current-carrying capacity of the superconductive material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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