Abstract
The present work is aimed at studying the possibility of synthesizing nanodispersed particles in the Si-C-N-O system and then studying the resulting synthesis products. Three series of experiments were carried out under different atmospheres of the reactor chamber: air, air + argon, argon. The possibility of synthesis of particles of the ternary Si-C-N system was considered. In the course of the study, it was found that, in the air atmosphere of the reactor chamber, the production of silicon carbonitride particles is not feasible due to the oxidation of precursor phases. The result was the production of nanodispersed particles of cubic silicon carbide, which were obtained by the method of plasmadynamic synthesis in a hyper-velocity jet silicon-carbon plasma. The obtained products were subjected to a thermal analysis. During the thermal analysis, the most optimal annealing temperature range was found to be 600-700 °C. Annealing at this temperature in air allows the synthesis product to be eliminated from the unreacted carbon phase.
Highlights
In the last decade, the problem of obtaining materials of a new generation is urgent
The results of experiments were the production of powdered products, which were studied by X-ray diffractometry (Shimadzu XRD 6000 (CuKα – radiation)) and transmission electron microscopy (Philips CM 12)
In experiments with an atmosphere of air and argon: the product includes the phase of cubic silicon carbide (β-SiC) and cubic silicon in addition to the predominant oxygen oxide
Summary
The problem of obtaining materials of a new generation is urgent. Chemical resistance and high hardness make it possible to use silicon carbide in the production of abrasive materials [1,2,3]. Silicon carbide ceramics have remarkable thermal properties, which makes it possible to use SiC for production of refractories with high thermal stability and strength [6, 7].
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