AbstractHigh voltage electric discharge (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. Spark plasma sintering (SPS) of powder mixtures 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.
High Temperature Materials and Processes – de Gruyter
Published: Sep 26, 2017
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