Abstract
This paper presents the experimental results of metal carbides synthesis by DC arc discharge plasma in ambient air. The results indicate that the synthesis takes place in the atmosphere of CO and CO2, which are generated during the DC arcing process on graphite electrodes and that mixture of CO and CO2 prevents the reaction zone from air oxygen. The paper introduces experimentally substantiated arguments about the possibility of obtaining metal carbides by the developed arc discharge method. By the moment, the authors have already obtained silicon carbide and titanium carbide in this way.
Highlights
Metals and non-metals carbides play a significant role in the scientific and technical development for over 100 years [1]
Carbides are usually prepared by carbothermic reduction of oxides in furnaces of various types: generation of electron and ion beams, generation of electric discharge and microwave plasma, chemical vapor deposition (CVD), laser ablation, etc
In the last 5–8 years, there have been some papers in the scientific literature about the possibility of synthesizing carbon nanotubes and graphene by electric arc plasma in the air [2,3,4], including ambient air [5, 6]
Summary
Metals and non-metals carbides play a significant role in the scientific and technical development for over 100 years [1]. In the last 5–8 years, there have been some papers in the scientific literature about the possibility of synthesizing carbon nanotubes and graphene by electric arc plasma in the air [2,3,4], including ambient air [5, 6]. This approach allows significantly simplify the design of electric arc plasma reactors and reduce the cost of carbon nanostructures synthesis [4]. Experimental studies with control of electrical parameters of the discharge circuit, the electrodes temperature, and the gas atmosphere can only partially solve the above-mentioned issues
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