The effect of added oversized elements on the microstructure of binary alloy nanoparticles

Shin Pon Ju, Cheng I. Weng, Yi Yun Chang, Yung Yun Chen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Molecular dynamics simulations are used to investigate the microstructures of Cu-Ni nanoparticles with different concentrations of oversized atoms added to them. A many body second moment tight binding approximation potential is adopted to model the interatomic interactions. The Honeycutt-Anderson (HA) pair analysis technique is adopted to analyse in detail the transformation between local structures at different temperatures. From the simulation results, at temperatures higher than the melting point, the nanoparticles are in a liquid state and an icosahedral local structure is most frequently found inside the nanoparticles. At temperatures beneath the melting point, the fraction of FCC local structure increases with decreasing concentrations of the larger size atoms, whereas a larger fraction of amorphous structure still remains in the solid state for higher concentrations of oversized atoms. This is because the effects of distortion and misfit are more significant for a nanoparticle having a higher concentration of oversized atoms.

Original languageEnglish
Article number037
Pages (from-to)4748-4757
Number of pages10
JournalNanotechnology
Volume17
Issue number18
DOIs
Publication statusPublished - 2006 Sep 28

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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