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Information × Registration Number 0225U000285, (0123U102989) , R & D reports Title Preparation of nanosized powder of tungsten carbides by high-frequency electrospark treatment of tungsten granules popup.stage_title Дослідження порошкових продуктів високочастотної електроіскрової обробки вольфрамових гранул і визначення режимів продуктивного синтезу нанорозмірних карбідних фаз Head Adamchuk Yurii O., Registration Date 08-01-2025 Organization Institute of Impulse Processes and Technologies National Academy of Sciences of Ukraine popup.description1 To determine the modes of high-frequency electrospark processing of metallic tungsten in carbon-containing liquids, in which the powder processing products have the highest yield of nanosized tungsten carbides. popup.description2  Object of Research: Pure nanoscale tungsten carbide powders. Research Methods: Physical experimentation, multifactorial experiments, X-ray structural and X-ray phase analyses, registration of high-speed electrical processes, and optical microscopy. Recommendations have been developed regarding the selection of initial electrical characteristics of the current pulse source and the chemical composition of the carbon-containing working fluid to achieve the most productive synthesis of nanoscale tungsten carbides. The conditions for synthesizing pure nanoscale tungsten carbide powder (40 nm) by high-frequency electro-discharge processing of tungsten in a carbon-containing fluid were determined. These conditions include the use of electrode voltages ranging from 300 V to 600 V and a processing frequency of at least 8 kHz. It was established that, to increase the productivity of high-frequency electro-spark synthesis of tungsten carbide phases—measured by the mass of powder products formed per unit of time and the content of nanoscale carbides within them—the voltage applied to the electrodes should be increased (up to 600 V), along with the frequency of discharge pulses (up to 10 kHz). Additionally, a carbon-containing fluid with a higher molar mass (e.g., kerosene) should be used. Doubling the electrode voltage results in an average productivity increase of 2.15 times. Specific energy consumption per unit mass of the synthesized tungsten carbide does not correlate with either frequency or voltage and averages 8.57 kW·hour/kg. Product Description popup.authors Adamchuk Yurii O. Prystash Mykola S. Starkov Ihor M. popup.nrat_date 2025-01-08 Close