A Co-Condensation Model for In-Flight Synthesis of Metal-Carbide Nanoparticles in Thermal Plasma Jet

Abstract

We present a theoretical analysis of the formation, growth, and transport of two-component nanoparticles in thermal plasma jet. The approach of the aerosol science and the idea of multicomponent co-condensation are employed for the analysis. The processes of homogeneous nucleation, heterogeneous growth, and coagulations due to Brownian collisions are considered in combination with the convective and diffusive transport of particles and the reacting gases within an axisymmetric domain. As a particular example, the authors study multicomponent co-condensation of metal-carbide nanoparticles from various precursors in a DC plasma gun operating in an argon atmosphere.

Modeling and simulation of a turbulent‐like thermal plasma jet for nanopowder production

“…Particularly, models based on aerosol dynamics have been used to study nanopowder production using several types of thermal plasmas, as described in an earlier review article [12]. By virtue of the efforts of several groups, the spatial distributions of nanopowder around plasmas or in downstream chambers have been clarified while taking account of both growth and transport under various conditions [22][23][24][25][26][27][28][29][30][31][32][33]. However, all those simulations were restricted in the steady fields of the nanopowder as well as the plasma flow.…”

Two-Directional Nodal Model for Co-Condensation Growth of Multicomponent Nanoparticles in Thermal Plasma Processing

“…Vorobev et al also attempted to simulate the nanoparticle formation process with co-condensation growth by their own numerical approach ( Ref 22,23). They successfully predicted the two-dimensional distribution of tantalum-carbide nanoparticles fabricated by thermal plasma jets.…”

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

“…Only a few aerosol-dynamics-based models have been developed for thermal plasma fabrication of nanopowders involving co-condensations of binary material vapors [ 22 , 23 , 24 ]. Those models adopted several oversimplifications to obtain simple numerical solutions including only mean values.…”