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

• Published in: Journal of thermal spray technology Vol. 17; no. 5-6; pp. 956 - 965
• Main Authors: Vorobev, A., Zikanov, O., Mohanty, P.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.12.2008; Springer Nature B.V
• Subjects: Aerosols; Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Machines; Manufacturing; Materials Science; Nanoparticles; Nucleation; Peer Reviewed; Precursors; Processes; Sprayers; Sprays; Surfaces and Interfaces; Theoretical analysis; Thermal plasmas; Thin Films; Transport; Tribology; nanoparticles; homogeneous nucleation; heterogeneous condensation; thermal plasma spraying; refractory coating; Brownian collisions; numerical modeling
• ISSN: 1059-9630; 1544-1016
• DOI: 10.1007/s11666-008-9240-y

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.