Effect of saturation pressure difference on metal-silicide nanopowder formation in thermal plasma fabrication

Masaya Shigeta, Takayuki Watanabe

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A computational investigation using a unique model and a solution algorithm was conducted, changing only the saturation pressure of one material artificially during nanopowder formation in thermal plasma fabrication, to highlight the effects of the saturation pressure difference between a metal and silicon. The model can not only express any profile of particle size-composition distribution for a metal-silicide nanopowder even with widely ranging sizes from sub-nanometers to a few hundred nanometers, but it can also simulate the entire growth process involving binary homogeneous nucleation, binary heterogeneous co-condensation, and coagulation among nanoparticles with different compositions. Greater differences in saturation pressures cause a greater time lag for co-condensation of two material vapors during the collective growth of the metal-silicide nanopowder. The greater time lag for co-condensation results in a wider range of composition of the mature nanopowder.

Original languageEnglish
Article number43
JournalNanomaterials
Volume6
Issue number3
DOIs
Publication statusPublished - 2016 Mar 7
Externally publishedYes

Keywords

  • Co-condensation
  • Metal silicide
  • Modelling
  • Nanopowder
  • Thermal plasma

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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