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Phase Transformation in Nanoscale Indium–Tin Alloy Particles Embedded in Metallic Matrices

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Abstract:

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 - and -phases and very fine precipitates of In or Sn. Both - and -phases possess an orientation relationship with Al. The in situ results suggest that the -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.

Keywords: IN-SN ALLOY SYSTEM; INDIUM-TIN ALLOY PARTICLES; NANO EMBEDDED PARTICLES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2007.708

Publication date: June 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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