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Article Dans Une Revue The European Physical Journal B: Condensed Matter and Complex Systems Année : 2003

The high-pressure phase sequence in nanocrystalline Zirconia

Résumé

X-ray diffraction and Raman data on the pressure induced phase transitions of a nanometric zirconia, ZrO2, are analyzed via a classical phenomenological Landau approach of the bulk. It is concluded that the initial tetragonal structure (D 4h15), which is a metastable bulk state of zirconia at ambient conditions, evolves continuously towards the ideal cubic fluorite structure (Oh5) via an intermediate tetragonal form (D4h14). The proposed phenomenological model describes consistently all experimental peculiarities, including the hybridization and softening of the low-frequency Raman active modes along with lattice-parameter anomalies.

Dates et versions

hal-00418067 , version 1 (17-09-2009)

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Pierre Bouvier, Vladimir P. Dmitriev, Guy Lucazeau. The high-pressure phase sequence in nanocrystalline Zirconia. The European Physical Journal B: Condensed Matter and Complex Systems, 2003, 35 (3), pp. 301-309. ⟨10.1140/epjb/e2003-00281-5⟩. ⟨hal-00418067⟩
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