Phase transition of pure zirconia under irradiation: A textbook example - Archive ouverte HAL
Article Dans Une Revue Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Année : 2006

Phase transition of pure zirconia under irradiation: A textbook example

Résumé

One of the most important goals in ceramic and materials science is to be able to design materials with specific properties. Irradiation seems to be a powerful tool for the design of advanced ceramics because of its ability to modify over different scales the microstructure of solids. Nowadays, it is clearly proved that irradiation induces order-disorder phase transitions in metallic alloys and in some ceramics. In this paper, we show that a displacive phase transition can also be induced by irradiation. Based on many experimental facts, a microscopic model is proposed to explain the displacive phase transition observed in this material after irradiation. Defects, produced in the oxygen sublattice, induce important strain fields on a nanometric scale. This strain field can be handled as a secondary order parameter within the Landau theory approach, leading to a decrease of the phase transition temperature and thus quenching the high temperature tetragonal phase. (c) 2006 Elsevier B.V. All rights reserved.

Dates et versions

hal-00115271 , version 1 (20-11-2006)

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David Simeone, Gianguido Baldinozzi, D. Gosset, S. Le Caer. Phase transition of pure zirconia under irradiation: A textbook example. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2006, 250 (1-2), pp.95-100. ⟨10.1016/j.nimb.2006.04.092⟩. ⟨hal-00115271⟩
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