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Compressive creep of dense Bi2Sr1.7CaCu2Ox

Published online by Cambridge University Press:  31 January 2011

J.L. Routbort ,
K.C. Goretta ,
D.J. Miller ,
D.B. Kazelas ,
C. Clauss  and
A. Domínguez-Rodríguez
J.L. Routbort
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439-4838
K.C. Goretta
Affiliation:
Materials and Components Technology Division, Argonne National Laboratory, Argonne, Illinois 60439-4838
D.J. Miller
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439-4838
D.B. Kazelas
Affiliation:
Materials and Components Technology Division, Argonne National Laboratory, Argonne, Illinois 60439-4838
C. Clauss
Affiliation:
Department of Condensed Matter Physics, Universidad de Sevilla, 41080 Sevilla, Spain
A. Domínguez-Rodríguez
Affiliation:
Department of Condensed Matter Physics, Universidad de Sevilla, 41080 Sevilla, Spain
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Abstract

Dense polycrystalline Bi2Sr1.7CaCu2Ox (2212) was deformed from 780–835 °C in oxygen partial pressures, Po2, of 103 to 2 × 104 Pa. Results could be divided into two stress regimes: one at lower stress in which the steady-state creep rate, ∊, was proportional to stress, γ, having an activation energy of 990 ± 190 kJ/mole and being independent of PO2, and another at higher stress in which ∊ was proportional to σn, with n ≍ 5–6. Transmission electron microscopy supported the interpretation that in the lower-stress viscous regime, creep was controlled by diffusion, whereas dislocation glide and microcracking were responsible for strain accommodation at higher stresses.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 9 , September 1992 , pp. 2360 - 2364
Copyright
Copyright © Materials Research Society 1992

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