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The present work reported a novel way of direct and quick making nanocrystalline Ti-B/Ti-B-N phases out of amorphous boron powder (B) and crystalline titanium (Ti). Nanopowders were obtained by the synthesis in a hypersonic plasma jet. This method is based on the use of a coaxial magnetoplasma accelerator as a plasma generator. The accelerated plasma jet flew to a working chamber filled in argon in...
The dependences of the microstructure and physical and mechanical properties of ceramic mixtures Si3N4/TiN in the full range of mass ratios of the components were studied. The process of sintering and physical and chemical processes were investigated. In particular, the hardness and density of the material were obtained depending on the ratio of conductive titanium nitride and insulating silicon nitride...
The synthesis of copper oxides has a great importance due to the fact these materials are widely used in high temperature superconductors manufacturing. It's known that properties of materials in nanodispersed conditions are improved. In this article, an analysis of nanodispersed plasma dynamic synthesis product obtained using coaxial magnetoplasma accelerator with copper electrodes was carried out...
Silicon carbide (SiC) nanomaterials can be successfully used for ceramics production and semiconductor applications. The possibility of the SiC nanopowder synthesis in an electrodischarge silicon-carbon plasma jet generated by a pulsed coaxial magnetoplasma accelerator (CMPA) is shown in this paper. A plasma jet expired in a free space of a reactor chamber filled with argon. The synthesized product...
Today the effectiveness of using of electromagnetic energy is a key issue in the creation and application of electrical devices. It is known that coaxial magneto plasma accelerator can be used to synthesize ultrafine powders of functional materials. The factors that influence on its efficiency are not studied enough. In this paper we demonstrate the possibility of achieving high (about 80%) efficiency...
The possibility is shown to synthesize a nanodispersed powder in the system “carbon-nitrogen” in a hypervelocity electrical discharge plasma jet generated by a coaxial magnetoplasma accelerator (CMPA). The plasma shot is provided in the pressurized chamber filled with the gaseous nitrogen. Up to 1 gram of black powdered product is synthesized for one working cycle having a duration about 100 ms. According...
The possibility is shown to obtain a nanodispersed powder with the spherical shape particle and with the equal components distribution in a hypervelocity electrical discharge plasma jet generated by a coaxial magnetoplasma accelerator (CMPA). The developed method allows to obtain: nanodispersed (∼ 50 nm), polymorphic crystalline TiO2 phases with the admixture of cubic TiN by the titanium plasma efflux...
The possibility of plasmodynamic synthesis of nanodispersed cubic boron nitride in hyperhigh speed jet of electrodischarged boron-carbon plasma is demonstrated in this work.
Experimental results on high-velocity acceleration of plasma in a coaxial magneto-plasma accelerator are presented. With a barrel length of 300 mm, the front part of the discharge-plasma structure was accelerated by a current pulse of up to 150 kA to a velocity of 3-5 km/s at atmospheric pressure. For one cycle the plasma mass is obtained up to 10 g. The coatings of copper and alloy steel of high...
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