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Microstructure, shape, stability and melting inembeddednanoparticles

Chattopadhyay, K and Bhattacharya, V (2009) Microstructure, shape, stability and melting inembeddednanoparticles. In: Journal of the Indian Institute of Science, 89 (1).

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The present article reviews some of the current work on a new class of materials which are nanoscale granular materials. We shall discuss in this paper two phase granular materials where one of the phases having nanometric dimension is embedded in a matrix of larger dimension. Known as nanoembedded materials, nanocomposites or ultrafine granular materials, this class of materials has attracted attention because of the opportunity of basic studies on the effect of size and embedding matrix on transformation behaviors as well as some novel properties, which include structural, magnetic and transport properties. These are in addition to the tremendous interests in what is known as quantum structures(embedded particles size less than 5 nm) for the case of semiconductors, which will not be discussed here. We shall primarily review the work done on metallic systems where the dispersed phases have low melting points and borrow extensively from the work done in our group. The phase transformations of the embedded particles show distinctive behavior and yield new insights. We shall first highlight briefly the strategy of synthesis of these materials by non-equilibrium processing techniques, which will be followed by examples where the effect of length scales on phase transformation behaviors like melting and solidification are discussed.

Item Type: Journal Article
Publication: Journal of the Indian Institute of Science
Publisher: The Indian Institute of Science (IISc)
Additional Information: Copyright of this article belongs to The Indian Institute of Science (IISc).
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 02 Feb 2012 05:41
Last Modified: 02 Feb 2012 05:41
URI: http://eprints.iisc.ac.in/id/eprint/43353

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