Production of carbonic nanomaterials in the course of electrodischarge treatment of organic liquids

Кускова, Н. И.; Yushchishina, A. N.; Malyushevskaya, A. P.; Tsolin, P. L.; Petrichenko, L. A.; Smal’ko, A. A.

doi:10.3103/s1068375510020110

Cited by 11 publications

(5 citation statements)

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“…The carbon content of the composite powders increases because high-voltage discharge treatment produces a high-pressure and high-temperature region in hydrocarbon liquid; hydrocarbon molecules decompose in this region, resulting in end products such as carbon in the solid phase and hydrogen in the gaseous one [13]. Active nanocarbon, whose allotropic modification depends on the type of liquid, can both penetrate into the powder structure and be distributed on its surface under the action of shock waves, and the hydraulic flow leads to the intensive mixing of the suspension, which substantially influences the mechanical properties of sintered material.…”

Section: Resultsmentioning

confidence: 99%

Effect of high-voltage discharge on the particle size of hard alloy powders

Sizonenko

Baglyuk

Raichenko

et al. 2011

Powder Metall Met Ceram

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The effect of high-voltage discharge treatment of Fe-20% TiC and VK6-1% ASUD75 diamond powder mixtures on their particle size and morphology is examined. It is shown that high-voltage discharge treatment in a powder suspension permits substantial refinement in the particle size and increase in the shape factor and specific surface area. A near-linear dependence is established between the total treatment energy and powder particle size. It is shown that hydrocarbon liquid is much more efficient than water as a working medium.

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Section: Resultsmentioning

confidence: 99%

Effect of high-voltage discharge on the particle size of hard alloy powders

Sizonenko

Baglyuk

Raichenko

et al. 2011

Powder Metall Met Ceram

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“…The method based on the synthesis of carbon nanostructures from carbon-containing plasma, which is formed as a result of high-voltage breakdown of hydrocarbons, has great potential. It was previously shown [24,25] that a wide range of allotropic forms of carbon is formed as a result of the electric discharge effect on liquid hydrocarbons. At the same time, the structural and phase state of nanocarbon is largely determined by the dynamics of plasma-chemical and thermodynamic processes occurring during their synthesis.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…This determines the possibility of targeted production of various forms of nanocarbon. In [24], it was observed that the yield of nanocarbon powder increases as the length of the hydrocarbon chain of the raw material increases. In this case, both solid phase nanocarbon with an amorphous structure and gaseous products are formed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Synthesis of nanocarbon by high-voltage breakdown of hydrocarbons

Kuskova,

Malyushevskaya,

Prystash

et al. 2023

EEJET

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The object of research is the mechanisms of synthesis of nanocarbon structures in the process of electric high-voltage breakdown of hydrocarbons. The problem to be solved is the purposeful synthesis of various types of nanocarbon with small losses of raw materials. Mechanisms of nanocarbon formation in the process of high-voltage electric breakdown of hydrocarbons have been established. It is shown that a high-voltage breakdown leads to a cascade of chemical transformations. As a result of transformations, lower gaseous hydrocarbons are formed due to the destruction of molecules and higher ones – as a result of polymerization, and as a result of dehydrocyclization and polymerization with the participation of metal catalysts – various carbon nanostructures. The possibility of targeted synthesis of fullerene-like structures, nanotubes with diameters from 10 to 50 nm, nanofibers, and films is demonstrated. Experimental studies have confirmed that the qualitative and quantitative composition of nanocarbon can be varied in a wide range. With an increase in the number of carbon atoms or the number of C–C bonds in the raw material molecules, other things being equal, the practical yield of solid nanocarbon increases. It was determined that the synthesis of structured nanocarbon from a mixture of hydrocarbon gases, formed as a result of high-voltage breakdown of liquid hydrocarbons, actively occurs on the nickel-chromium catalytic surface. An increase in the area of the catalytic deposition surface leads to an increase in the yield of nanocarbon. The study of the ability of the obtained nanocarbon samples to absorb electromagnetic radiation confirmed the potential of the method of high-voltage breakdown of hydrocarbons for the synthesis of materials that weaken electromagnetic radiation at a frequency of 25 to 38 GHz. The greatest weakening is observed for samples consisting mainly of carbon nanotubes and nickel nanoparticles

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“…Galvanic contact of point-electrode with layer of processed powder was ensured during treatment. Specific treatment energy of micropowders of different mass composition was chosen in accordance to condition of full carbidization of titanium to obtain blend of Fe -Ti -C system with hardening TiC phase content from 25 to 75 % (see table 1) [4,5]. Computer granulometric and X-ray diffraction analysis were used to study the impact of HVED on dispersity, form and phase composition of powder mixtures [6].…”

Section: Object and Methods Of Studiesmentioning

confidence: 99%

Plasma methods of obtainment of multifunctional composite materials, dispersion-hardened by nanoparticles

Sizonenko¹,

Grigoryev

Zaichenko³

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.The new approach in developed plasma methods consists in that dispersionhardening additives (TiC, TiB 2 in particular) are not mechanically added to powder mixture as additional component, as in conventional methods, but are instead synthesized during high voltage electric discharges (HVED) in disperse system "hydrocarbon liquid -powder"; preservation of ultrafine structure is ensured due to use of spark plasma sintering (SPS) as a consolidation method. HVED in disperse system "hydrocarbon liquid -powder" due to impact of plasma discharge channel, electromagnetic fields, shock waves mechanical impact, hydro flows and volume microcavitation leads to synthesis of nanocarbon, metal powders dispersion and synthesis of micro-(from 10 -6 to 10 -7 m) and nanosized (from 10 -7 to 10 -9 m) composite powders of hardening phases. SPS is the passage of pulsed current (superposition of direct and alternating current) through powder with the simultaneous mechanical compressing. The formation of plasma is initiated in gaseous phase that fills gaps between particles. SPS allows targeted control of grain growth rate and thus allows obtainment of multifunctional composite materials dispersion hardened by nanoparticles. Processes of HVED synthesis of micro-and nanosized powders of new compositions from elemental metal powders and their mixtures with the subsequent application of high-speed SPS of obtained powders create conditions for increase of strength (by 10 -20 %), hardness and wear-resistance (by 30 -60 %) of obtained materials. IntroductionNuclear energetics is one of the most dynamic sectors of the world economy. Each new generation of nuclear plants becomes more efficient and safe, but demands the use of materials that have high strength, wear-resistance and are capable of working in aggressive environments. Thus, development of construction materials for nuclear plants is important scientific and technical task.Creation of heterogeneous structure in material, which is a plastic matrix with hard inclusions, is a necessary condition to ensure materials strength and wear-resistance. Heterogeneous materials include metal-matrix composites of Fe -Ti -C system, obtained with methods of powder metallurgy. These materials have high strength, hardness, their wear resistance is close to tungsten-containing alloys and their modification by boron carbide leads to increase in corrosion and radiation resistance [1].

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Production of carbonic nanomaterials in the course of electrodischarge treatment of organic liquids

Cited by 11 publications

References 0 publications

Effect of high-voltage discharge on the particle size of hard alloy powders

Effect of high-voltage discharge on the particle size of hard alloy powders

Synthesis of nanocarbon by high-voltage breakdown of hydrocarbons

Plasma methods of obtainment of multifunctional composite materials, dispersion-hardened by nanoparticles

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