Phenomenological theory of the crystalline-to-amorphous phase transition during self-irradiation

A theoretical approach to the crystalline-to-amorphous phase transformation during self-irradiation is proposed. The different stages of the amorphization process (metamictization) are shown to correspond to internally stressed equilibrium states, associated with the minima of a free-energy function...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2005-10, Vol.17 (42), p.6627-6634
Main Authors: Tolédano, Pierre, Bismayer, Ulrich
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Physics
Solid-solid transitions
Specific phase transitions
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Summary:A theoretical approach to the crystalline-to-amorphous phase transformation during self-irradiation is proposed. The different stages of the amorphization process (metamictization) are shown to correspond to internally stressed equilibrium states, associated with the minima of a free-energy functional, in which the elastic distortions induced by the creation of amorphous material are compensated by an internal stress-field, deriving from a unique stress-field potential. The transformation dynamics is described in terms of a nucleation and growth mechanism of amorphous regions involving a critical size.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/17/42/003