Growth model of binary alloy nanopowders for thermal plasma synthesis

Masaya Shigeta, Takayuki Watanabe

研究成果: Article査読

55 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号043306
ジャーナルJournal of Applied Physics
108
4
DOI
出版ステータスPublished - 2010 8 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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