Investigation of the synthesis of nanoparticles by the method of spark erosion with overvoltage of the discharge gap

Sleptsov, V. V.; Savkin, A. V.; Berdnik, V. I.; Kukushkin, D. Yu.; Diteleva, A. O.; Samotaev, Nikolay

doi:10.1088/1757-899x/498/1/012033

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…It is known that the spark discharge is a pulsed phenomenon. If a self-breakdown scheme (where overvoltage is provided) of the discharge gap is used, the duration of a spark current pulse is determined by a voltage pulse generator or the parameters of the electrical circuit [24]. This characteristic can vary from a few nanoseconds to a few microseconds.…”

Section: Introductionmentioning

confidence: 99%

Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure

et al. 2023

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Discharges with cathode spots can operate in a wide range of gas pressures. Erosion of the cathode material is an inherent property of such discharges. The erosion products are considered to be ionized atoms and electrically neutral microdroplets. In accordance with this concept, a plasma source based on a pulsed cathodic arc discharge in atmospheric-pressure argon with a current of up to 200 A, a pulse duration of 250 μs, and a pulse repetition rate of 10 Hz was implemented. Using this source, the synthesis of magnesium oxide powder was performed. The chemical composition of the erosion products was determined using the TEM/EDS method and the composition of the gas mixture in which the discharge system operated was evaluated by optical spectrometry. It was shown that particles of the synthesized powder have different morphological features, depending on the nature of the electrical erosion of the cathode material. Micron-sized particles are formed due to the removal of microdroplets from liquid–metal craters on the cathode surface at certain plasma pressures. Submicron particles are produced during the agglomeration of atoms originating from the plasma jets flowing out from cathode spots. These atoms are magnesium ions that are neutralized by collisions with gas particles. The advantages and disadvantages of this synthesis method are discussed in this paper. The reference methods for the powder synthesis of magnesium oxide are compared. The prospects of the studied method from the point of view of its application for obtaining ceramic materials are also evaluated.

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Section: Introductionmentioning

confidence: 99%

Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure

et al. 2023

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“…Wire electrical discharge machining (WEDM) is a nontraditional, thermoelectric process which erodes material from the work piece by a series of discrete electric discharge sparks (EDS) between a work and tool electrode immersed in a liquid dielectric medium [7]. The major advantage of EDS is that the selection of machining parameters in a machining process significantly affects erosion products of both workpiece surfaces [8] and debris, making it a simple, effective technique to generate multi-scale metallic particles [9][10][11]. Most previous researches in EDS powder preparation focused on the minimization of the occurrence of the larger particle mode to produce nanometer-scale powders [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of WEDM process parameters on properties of bronze particles using the Taguchi method

Zhao

2022

SN Appl. Sci.

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Electrical discharge erosion in liquid media is a simple, effective technique to generate multi-scale metallic particles. An experimental investigation was conducted to determine the main machining parameters which contribute to particle size (PS) and size distribution (SD) in WEDM of bronze. Five factors, including three-level built-in processing patterns, wire speed and dielectric medium, are selected as control parameters using an orthogonal array L16(45) Taguchi method, PS and SD of produced powders are the measure of quality. The goal is to obtain micron-scale spherical metal powder with uniform particle size. Results show that cutting-section pattern is the most significant factor, and the electrolyte is the least. The PS and SD performance of the optimized powders is significantly improved by using Taguchi method. Spherical bronze powder with particle size of d10 11.05 μm, d50 31.13 μm and d90 67.48 μm are prepared using the optimized WEDM process parameter, which is A3–B4–C3–D1–E1 including dielectric medium water, cutting class 4, cutting division 3, cutting Sect. 1 and wire speed 200 μm/s. The research confirms that WEDM can be used to produce micron-scale metallic powders, providing cheap and high-quality metallic powders for the metal additive manufacturing industry.

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Investigation of the synthesis of nanoparticles by the method of spark erosion with overvoltage of the discharge gap

Cited by 2 publications

References 10 publications

Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure

Magnesium Oxide Powder Synthesis in Cathodic Arc Discharge Plasma in an Argon Environment at Atmospheric Pressure

Experimental investigation of WEDM process parameters on properties of bronze particles using the Taguchi method

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