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A study of phase separation in ternary alloys

Bhattacharyya, Saswata and Abinandanan, TA (2003) A study of phase separation in ternary alloys. In: Bulletin of Materials Science, 26 (1). pp. 193-197.

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We have studied the evolution of microstructure when a disordered ternary alloy is quenched into a ternary miscibility gap. We have used computer simulations based on multicomponent Cahn-Hilliard (CH) equations for c(A) and c(B), the compositions (in mole fraction) of A and B, respectively. In this work, we present our results on the effect of relative interfacial energies on the temporal evolution of morphologies during spinodal phase separation of an alloy with average composition, c(A) = 1/4, c(B) = 1/4 and c(C) = 1/2. Interfacial energies between the 'A' rich, 'B' rich and 'C' rich phases are varied by changing the gradient energy coefficients. The phases associated with a higher interfacial energy are found to be more rounded than those with lower energy. Further, the kinetic paths (i.e. the history of A-rich, B-rich and C-rich regions in the microstructure) are also affected significantly by the relative interfacial energies of the three phases.

Item Type: Journal Article
Publication: Bulletin of Materials Science
Publisher: Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Ternary systems;Cahn–Hilliard equations;spinodal decomposition.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 08 Aug 2011 08:54
Last Modified: 08 Aug 2011 08:54
URI: http://eprints.iisc.ac.in/id/eprint/39763

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