Synthesis of silicon carbide nanopowders in free flowing plasma jet with different energy levels

5th International Congress on Energy Fluxes and Radiation Effects 2016

Nikitin, D.^1 ; Sivkov, A.^1 ; Rahmatullin, I.^1 ; Ivashutenko, A.^1

National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk

634050, Russia^1

关键词: Carbide nanopowders;    Cubic silicon carbide;    Electrodischarges;    Hypersonic plasma;    Quasi-stationary;    Reactor chamber;    Silicon carbides (SiC);    Triangular shapes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012120/pdf
DOI  :  10.1088/1742-6596/830/1/012120

来源: IOP

【 摘 要 】

Silicon carbide (SiC) nanopowders were produced by the synthesis in an electrodischarge plasma jet generated by a high-current pulsed coaxial magnetoplasma accelerator. The present work focuses on the experiments where the obtained hypersonic plasma jet flew into space of the reactor chamber without impact on a target. The energy level of experiments was changed from ∼10.0 to ∼30.0 kJ. Four experiments were carried out at different energy levels. The powder products synthesized by the plasmadynamic method were studied by such well-known methods: X-ray diffraction (XRD), transmission electron microscopy (TEM). All the powders mainly contain cubic silicon carbide (β-SiC) particles with clear crystal structures and triangular shapes. SiC content reaches its maximum value 95% at the energy level 21.0 kJ, then SiC content is decreased to 70% the energy level 27.8 kJ. The powder crystallites in different experiments have approximately the same average crystallite size because quasistationary time, which allows growing powder crystallites, is absent.