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Phase transformation in nanoscale indium-tin alloy particles embedded in metallic matrices

Bhattacharya, Victoria and Chattopadhyay, Kamanio (2007) Phase transformation in nanoscale indium-tin alloy particles embedded in metallic matrices. In: Journal of Nanoscience and Nanotechnology, 7 (6). pp. 1736-1743.

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The interfaces influence the phase stability of small particles. For embedded indium-tin alloy particles, the interface among the phases present within the particles and the matrix contribute significantly to the free energy and hence influences the phase stability at small sizes. Our results show that upon rapid cooling, we obtain a combination of larger two-phase alloy particles consisting of $\beta$- and $\gamma$-phases and very fine precipitates of In or Sn. Both $\beta$- and $\gamma$-phases possess an orientation relationship with Al. The in situ results suggest that the $\beta$-rich phase gradually dissolved in the eutectic liquid before melting and the particles retain the facets much above the melting temperature of the alloy particle. We have tried to explain the formation and stability of these phases in terms of favorable nucleation kinetics.

Item Type: Journal Article
Publication: Journal of Nanoscience and Nanotechnology
Publisher: American Scientific Publishers
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 03 Aug 2007
Last Modified: 02 Feb 2012 09:24
URI: http://eprints.iisc.ac.in/id/eprint/11642

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