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Compressive creep of YBa2Cu3Ox

Published online by Cambridge University Press:  31 January 2011

K. C. Goretta ,
J. L. Routbort ,
A. C. Biondo ,
Y. Gao ,
A. R. de Arellano-López  and
A. Domínguez-Rodríguez
K. C. Goretta
Affiliation:
Argonne National Laboratory, Argonne, Illinois 60439-4838
J. L. Routbort
Affiliation:
Argonne National Laboratory, Argonne, Illinois 60439-4838
A. C. Biondo
Affiliation:
Argonne National Laboratory, Argonne, Illinois 60439-4838
Y. Gao
Affiliation:
Argonne National Laboratory, Argonne, Illinois 60439-4838
A. R. de Arellano-López
Affiliation:
Universidad de Sevilla, 41080 Sevilla, Spain
A. Domínguez-Rodríguez
Affiliation:
Universidad de Sevilla, 41080 Sevilla, Spain
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Abstract

YBa2Cu3Ox was deformed from 850 to 980 °C in oxygen partial pressures of 103 to 105 Pa. Steady-state creep rate, ̇, for P(O2) from 104 to 105 Pa could be expressed as ̇ = Aσ1.0 (GS)−2.8±0.6 exp −(970 ± 130 kJ/mole)/RT, where A is a constant, σ the steady-state stress, GS the average grain size, and R and T have their usual meanings, For P(O2) from 103 to 3 ⊠ 103 Pa, the activation energy decreased to about 650 kJ/mole and for a given temperature creep kinetics were much faster. The data and microscopic observations indicated that creep occurred by diffusional flow. Comparisons with diffusion data for YBa2Cu3Ox suggested that Y or Ba may be rate-controlling diffusing species.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 12 , December 1990 , pp. 2766 - 2770
Copyright
Copyright © Materials Research Society 1990

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