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Title: Preferential orientation of metal oxide superconducting materials by mechanical means

Abstract

A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<.times.<0.5) is capable of accommodating very large current densities. By aligning the two-dimensional Cu--O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the metal oxide material to accommodate high current densities. The orthorhombic crystalline particles have a tendency to lie down on one of the longer sides, i.e., on the a- or b-direction. Aligning the crystals in this orientation is accomplished by mechanical working of the material such as by extrusion, tape casting or slip casting, provided a single crystal powder is used as a starting material, to provide a highly oriented, e.g., approximately 90% of the crystal particles have a common orientation, superconducting matrix capable of supporting large current densities.

Inventors:
 [1]
  1. (Bolingbrook, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
867617
Patent Number(s):
4973575
Assignee:
Arch Development Corporation (Argonne, IL) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
preferential; orientation; metal; oxide; superconducting; materials; mechanical; means; superconductor; comprised; polycrystalline; yba; cu; 7-x; times; capable; accommodating; current; densities; aligning; two-dimensional; cu-o; layers; carry; a-; b-directions; basal; plane; degree; crystalline; axes; alignment; provided; adjacent; grains; permitting; material; accommodate; orthorhombic; particles; tendency; lie; b-direction; crystals; accomplished; extrusion; tape; casting; slip; single; crystal; powder; starting; provide; highly; oriented; approximately; 90; common; matrix; supporting; polycrystalline metal; adjacent grains; preferential orientation; current densities; conducting material; oxide superconducting; starting material; metal oxide; single crystal; superconducting material; oxide material; superconducting materials; tape casting; mechanical means; slip cast; matrix capable; crystalline axes; grains permitting; basal plane; axes alignment; slip casting; superconductor comprised; tape cast; crystal particles; /505/264/

Citation Formats

Capone, Donald W. Preferential orientation of metal oxide superconducting materials by mechanical means. United States: N. p., 1990. Web.
Capone, Donald W. Preferential orientation of metal oxide superconducting materials by mechanical means. United States.
Capone, Donald W. Mon . "Preferential orientation of metal oxide superconducting materials by mechanical means". United States. https://www.osti.gov/servlets/purl/867617.
@article{osti_867617,
title = {Preferential orientation of metal oxide superconducting materials by mechanical means},
author = {Capone, Donald W.},
abstractNote = {A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<.times.<0.5) is capable of accommodating very large current densities. By aligning the two-dimensional Cu--O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the metal oxide material to accommodate high current densities. The orthorhombic crystalline particles have a tendency to lie down on one of the longer sides, i.e., on the a- or b-direction. Aligning the crystals in this orientation is accomplished by mechanical working of the material such as by extrusion, tape casting or slip casting, provided a single crystal powder is used as a starting material, to provide a highly oriented, e.g., approximately 90% of the crystal particles have a common orientation, superconducting matrix capable of supporting large current densities.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

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