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Characterization of Hot Isostatically Pressed Bi–Sr–Ca–Cu–O as a Function of Consolidation Variables

Published online by Cambridge University Press:  15 February 2011

K. C. Goretta,
D. J. Miller,
R. B. Poeppel and
A. S. Nash
K. C. Goretta
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
D. J. Miller
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
R. B. Poeppel
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
A. S. Nash
Affiliation:
Marquette University, Milwaukee, WI 53233
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Abstract

Fully dense, bulk Bi2Sr1.7CaCu2Ox (2212) superconductor pellets were made by hot isostatic pressing in an inert atmosphere. Electron microscopy revealed that rotation and bending of the platelike 2212 grains were responsible for much of the densification. Under processing conditions of 825°C and 105 MPa, dense pellets were obtained in 15 min. Many dislocations, planar faults, and, perhaps, intergrowths of the Bi2Sr2CuOx phase were produced during pressing. The dislocations were largely present in subgrain boundaries when the pressing times were increased to 45–120 min.

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