Growth model of binary alloy nanopowders for thermal plasma synthesis

Masaya Shigeta, Takayuki Watanabe

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

A new model is developed for numerical analysis of the entire growth process of binary alloy nanopowders in thermal plasma synthesis. The model can express any nanopowder profile in the particle size-composition distribution (PSCD). Moreover, its numerical solution algorithm is arithmetic and straightforward so that the model is easy to use. By virtue of these features, the model effectively simulates the collective and simultaneous combined process of binary homogeneous nucleation, binary heterogeneous cocondensation, and coagulation among nanoparticles. The effect of the freezing point depression due to nanoscale particle diameters is also considered in the model. In this study, the metal-silicon systems are particularly chosen as representative binary systems involving cocondensation processes. In consequence, the numerical calculation with the present model reveals the growth mechanisms of the Mo-Si and Ti-Si nanopowders by exhibiting their PSCD evolutions. The difference of the materials' saturation pressures strongly affects the growth behaviors and mature states of the binary alloy nanopowder.

Original languageEnglish
Article number043306
JournalJournal of Applied Physics
Volume108
Issue number4
DOIs
Publication statusPublished - Aug 15 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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