A Plasma Reactor for the Synthesis of High-Temperature Materials: Electro Thermal, Processing and Service Life Characteristics

• Published in: IOP conference series. Materials Science and Engineering Vol. 142; no. 1; pp. 12010 - 12018
• Main Authors: Galevskiy, G V, Rudneva, V V, Galevskiy, S G, Tomas, K I, Zubkov, M S
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2016
• Subjects: Borides; Copper; Enthalpy; Gauges; Magnetism; Mass flow rate; Plasma; Service life; Thermodynamic efficiency; Tungsten; Wall temperature; Zirconium dioxide
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/142/1/012010

The three-jet direct-flow plasma reactor with a channel diameter of 0.054 m was studied in terms of service life, thermal, technical, and functional capabilities. It was established that the near-optimal combination of thermal efficiency, required specific enthalpy of the plasma-forming gas and its mass flow rate is achieved at a reactor power of 150 kW. The bulk temperature of plasma flow over the rector of 12 gauges long varies within 5500÷3200 K and the wall temperature within 1900÷850 K, when a cylinder from zirconium dioxide of 0.005 m thick is used to thermally insulate the reactor. The specific electric power reaches a high of 1214 MW m3. The rated service life of electrodes is 4700 hours for a copper anode and 111 hours for a tungsten cathode. The projected contamination of carbides and borides with elec-trode-erosion products doesn't exceed 0.0001% of copper and 0.00002% of tungsten.