Evolution Mechanisms of Nano-Clusters in a Large-Scale System of 106 Liquid Metal Atoms During Rapid Cooling Processes

Abstract:

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A molecular dynamics simulation study has been performed for a large-sized system consisting of 106 liquid metal Al atoms to investigate the evolution characteristics of nano-clusters formed during rapid solidification processes. The cluster-type index method (CTIM) has been applied to describe the structural configurations of the basic clusters and nano-clusters. The results show that the icosahedral clusters (12 0 12 0) and their combinations play a critical role in the microstructural transitions. The nano-clusters are mainly formed by combining basic and medium sized clusters through continuous evolution. Their structural configurations are different from the multi-shell structures obtained by gaseous deposition, ionic spray, and so on. The central atoms of basic clusters composing the nano-cluster are bonded with each other, some central atoms are multi-bonded, and others single-bonded.

Info:

Periodical:

Solid State Phenomena (Volumes 121-123)

Edited by:

Chunli BAI, Sishen XIE, Xing ZHU

Pages:

1049-1052

DOI:

10.4028/www.scientific.net/SSP.121-123.1049

Citation:

R. S. Liu et al., "Evolution Mechanisms of Nano-Clusters in a Large-Scale System of 106 Liquid Metal Atoms During Rapid Cooling Processes", Solid State Phenomena, Vols. 121-123, pp. 1049-1052, 2007

Online since:

March 2007

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Price:

$35.00

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