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Dynamics of Ordering in Alloys with Modulated Phases

Bulbul Chakraborty
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Abstract

This paper presents a theoretical model for studying the dynamics of ordering in alloys which exhibit modulated phases. The model is different from the standard time-dependent Ginzburg-Landau description of the evolution of a non-conserved order parameter and resembles the Swift-Hohenberg model. The early-stage growth kinetics is analyzed and compared to the Cahn-Hilliard theory of continuous ordering. The effects of non-linearities on the growth kinetics are discussed qualitatively and it is shown that the presence of an underlying elastic lattice introduces qualitatively new effects. A lattice Hamiltonian capable of describing these effects and suitable for carrying out simulations of the growth kinetics is also constructed.

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Bulbul Chakraborty. 1993-10-15. Dynamics of Ordering in Alloys with Modulated Phases. https://doi.org/10.1103/physrevb.49.8608

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