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Open AccessArticle

Effect of Saturation Pressure Difference on Metal–Silicide Nanopowder Formation in Thermal Plasma Fabrication

1
Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
2
Department of Chemical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Krasimir Vasilev and Thomas Nann
Nanomaterials 2016, 6(3), 43; https://doi.org/10.3390/nano6030043
Received: 25 December 2015 / Revised: 26 February 2016 / Accepted: 1 March 2016 / Published: 7 March 2016
(This article belongs to the Special Issue Plasma Nanoengineering and Nanofabrication)
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. View Full-Text
Keywords: nanopowder; metal silicide; co-condensation; thermal plasma; modelling nanopowder; metal silicide; co-condensation; thermal plasma; modelling
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MDPI and ACS Style

Shigeta, M.; Watanabe, T. Effect of Saturation Pressure Difference on Metal–Silicide Nanopowder Formation in Thermal Plasma Fabrication. Nanomaterials 2016, 6, 43.

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