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Electron microscopic observation of rapidly cooled ZrO2-3 mol% Sm2O3 from the melt

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Abstract

Electron microscopic observation was made on ZrO2-3 mol % Sm2O3 specimens prepared from the melt using two different cooling rates, namely rapid quenching using a hammer-anvil apparatus and free cooling on a water-cooled copper hearth. The observed microscopic features, such as fully tetragonal grains with parallel twins or herringbone structure, anti-phase boundary contrast in a dark-field image, tweed structure, etc., were found to be quite similar to those observed in similarly prepared ZrO2-3 mol % Y2O3 specimens. It was specifically noted that the tweed structure, which requires atomic diffusion, was not suppressed by the rapid quenching, indicating a very fast growth rate. Trace analysis was also conducted on the tweed structure observed in freely cooled specimens.

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Author notes

  1. Y. Onda

    Present address: Hitachi Metals Co. Ltd, Chiyoda, 100, Tokyo, Japan

Authors and Affiliations

  1. Department of Mechanical Engineering, Tottori University, Koyama, 680, Tottori, Japan

    M. Hayakawa, Y. Onda & M. Oka

  2. Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Nagatsuta, Midori, 4259, Yokohama 227, Japan

    M. Yoshimura & M. Yashima

Authors
  1. M. Hayakawa
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  2. Y. Onda
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  3. M. Oka
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  4. M. Yoshimura
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  5. M. Yashima
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Hayakawa, M., Onda, Y., Oka, M. et al. Electron microscopic observation of rapidly cooled ZrO2-3 mol% Sm2O3 from the melt. JOURNAL OF MATERIALS SCIENCE 28, 6066–6069 (1993). https://doi.org/10.1007/BF00365022

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  • DOI: https://doi.org/10.1007/BF00365022

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