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The gamma to alpha phase transformation in cerium

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Abstract

At 295 K the fcc γ phase of cerium transforms at about 8 kbars pressure to the fcc α phase, the transformation volume decrease being about 18 pct. During decompression, the transformation reverses with a hysteresis of about 2 kbars. The microstructural integrity suggests a mediating phase, but none was found. Complete transformation to alpha and its reversal deformed the internal grain microstructure and drastically increased the lattice misorientation of the individual γ grains. Deformation bands were present along (111) planes. A similar transformation occurred during cooling of a pressurized specimen.

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Authors and Affiliations

  1. Los Alamos National Laboratory, P.O. Box 1663, 87545, Los Alamos, NM

    E. G. Zukas (Staff Members), R. A. Pereyra (Senior Technician) & J. O. Willis

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  1. E. G. Zukas
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  2. R. A. Pereyra
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  3. J. O. Willis
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Zukas, E.G., Pereyra, R.A. & Willis, J.O. The gamma to alpha phase transformation in cerium. Metall Trans A 18, 35–42 (1987). https://doi.org/10.1007/BF02646219

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  • DOI: https://doi.org/10.1007/BF02646219

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