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Compressive creep of YBa2Cu3Ox

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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.

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Authors and Affiliations

  1. Argonne National Laboratory, Argonne, 60439-4838, Illinois, USA

    K. C. Goretta, J. L. Routbort, A. C. Biondo & Y. Gao

  2. Universidad de Sevilla, 41080, Sevilla, Spain

    A. R. de Arellano-López & A. Domínguez-Rodríguez

Authors
  1. K. C. Goretta
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  2. J. L. Routbort
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  3. A. C. Biondo
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  4. Y. Gao
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  5. A. R. de Arellano-López
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  6. A. Domínguez-Rodríguez
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Goretta, K.C., Routbort, J.L., Biondo, A.C. et al. Compressive creep of YBa2Cu3Ox. Journal of Materials Research 5, 2766–2770 (1990). https://doi.org/10.1557/JMR.1990.2766

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  • DOI: https://doi.org/10.1557/JMR.1990.2766

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