Influence of the size distribution of granules and of their attractive interaction on the percolation threshold in granulated alloys

A. B. Khanikaev*, A. B. Granovskii, J. P. Clerc

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Numerical simulation was applied to study the influence of the size distribution of granules and the interaction between them on the percolation threshold in granulated metal-insulator alloys. An alloy model was considered in which metal granules have two characteristic sizes, l and L (with L > l), and the size distribution of granules of greater size L having an average value of approximately L0) is described by a normal distribution with a standard deviation d, by a step function with a halfwidth d, or by a delta function. A model with attraction between granules and mechanisms of trapping of an additional granule by an already developed cluster with a characteristic trapping range R was also considered. The percolation threshold significantly grows with the ratio L0/l and with R for both two- and three-dimensional cases and tends to flattening at large L/l or R. The calculated results make it possible to explain the high percolation threshold observed for the majority of granulated alloys.

Original languageEnglish
Pages (from-to)1611-1613
Number of pages3
JournalPhysics of the Solid State
Volume44
Issue number9
DOIs
Publication statusPublished - 1 Sep 2002

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