Uniaxial compaction of nanopowders on a magnetic-pulse press

Bokov, Arseniy; Boltachev, G. Sh.; Volkov, N. B.; Zayats, S. V.; Il’ina, A. M.; Nozdrin, A.; Paranin, S. N.; Olevskii, E. A.

doi:10.1134/s106378421310006x

Cited by 18 publications

(9 citation statements)

References 6 publications

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“…Micro-sized BaCe 0.8 Sm 0.2 O 3 (BCS-CuO) powder was obtained via nitrate combustion using BaCO 3 (99.2% wt), Ce(NO 3 ) 3 ∙6H 2 O (99.9% wt) and Sm(NO 3 ) 3 ·6H 2 O (99.0% wt) as starting materials. Modification of the powder by the addition of CuO as a sintering additive directly during the synthesis was proposed earlier in [ 43 ]. Thus, CuO (99.0% wt) taken in an amount of 1 wt% and BaCO 3 powders were dissolved in a minimum amount of diluted HNO 3 to obtain the corresponding nitrates and then mixed with the rest of the reagents in a small amount of distilled water.…”

Section: Methodsmentioning

confidence: 99%

Direct Electrophoretic Deposition and Characterization of Thin-Film Membranes Based on Doped BaCeO3 and CeO2 for Anode-Supported Solid Oxide Fuel Cells

2022

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In this work, a technology was developed for the formation of BaCe0.8Sm0.2O3+1 wt% CuO (BCS-CuO)/Ce0.8Sm0.2O1.9 (SDC) thin-film electrolyte membranes for intermediate-temperature solid oxide fuel cells (IT-SOFCs) on porous NiO-BCS-CuO anode substrates using direct electrophoretic deposition (EPD). The effect of increasing the zeta potential when modifying the base suspension of a micro-sized SDC-gn powder (glycine–nitrate method) with the addition of a SDC-lec nanopowder (laser evaporation–condensation) was investigated. Dependences of the current strength on the deposition time and the deposited weight on the EPD voltage were obtained, and evolution of the morphology of the coatings during the modification of the SDC-gn suspension and a suspension of BCS-CuO powder was studied. The compatibility of the shrinkage kinetics of the SDC, the BCS-CuO electrolyte coatings and the NiO-BCS-CuO anode substrate was studied during the high-temperature sintering. Dense BCS-CuO/SDC films of different thicknesses were obtained for the first time on porous NiO-BCS-CuO anode substrates and comprehensive microstructural and electrochemical studies were carried out. The developed technology can be applied to the formation of anode-supported SOFCs with thin-film electrolyte membranes.

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Section: Methodsmentioning

confidence: 99%

Direct Electrophoretic Deposition and Characterization of Thin-Film Membranes Based on Doped BaCeO3 and CeO2 for Anode-Supported Solid Oxide Fuel Cells

2022

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“…where ρ is the density (~8 g/cm 3 ); S is the specific surface area, m 2 /g. To produce solid samples, the EEIW bimetallic powders were subjected to magnetic pulse compaction (MPC) at the Institute of Electrophysics UrO RAN, (Yekaterinburg) [23]. The total amount of powder intended for the compaction was 400 g. A portion of 32 g of powder was loaded into a mold [23] and then pre-compacted in a static mode until reaching about 40% of the theoretical density.…”

Section: Methodsmentioning

confidence: 99%

“…To produce solid samples, the EEIW bimetallic powders were subjected to magnetic pulse compaction (MPC) at the Institute of Electrophysics UrO RAN, (Yekaterinburg) [23]. The total amount of powder intended for the compaction was 400 g. A portion of 32 g of powder was loaded into a mold [23] and then pre-compacted in a static mode until reaching about 40% of the theoretical density. Then, it was degassed at 350 • C and 1 Pa for 4 h prior to magnetic compaction, which was carried out at electric capacity and voltage values 2.2 mF and 4.1 kV, respectively.…”

Section: Methodsmentioning

confidence: 99%

Structural, Mechanical, and Tribological Characterization of Magnetic Pulse Compacted Fe–Cu Bimetallic Particles Produced by Electric Explosion of Dissimilar Metal Wires

Первиков

Khrustalyov

Filippov

et al. 2019

Metals

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Bimetallic 73 wt.% Fe–Cu nanoparticles have been produced using electric explosion of two immiscible metal wires and then consolidated into disks using magnetic pulse compaction. The compacted disks have been characterized for phase composition, mechanical strength, and high-temperature steel ball-on-disk sliding friction. The sample possessed good flexural and compression strength. Friction and wear reduction were observed during sliding test at 400 °C, which was explained by intense tribosynthesis of cuprospinel CuFe2O4 nanoparticles, which served to reduce adhesion between the ball and disk.

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“…The magnetic pulse compaction that is one of simplest dynamic methods was initially developed for nanosized powders [67][68][69][70]. The powder is loaded into a mold and pressed under the action of mild pulsed compression waves with durations of 10-500 µs and amplitudes of up to 5 GPa (upon repetitive usage).…”

Section: Magnetic Pulse Compaction Of Dry Nanosized Powdersmentioning

confidence: 99%

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

Мешалкин

Belyakov

2020

Processes

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Ceramic matrix composites reinforced with carbon nanotubes are becoming increasingly popular in industry due to their astonishing mechanical properties and taking into account the fact that advanced production technologies make carbon nanotubes increasingly affordable. In the present paper, the most convenient contemporary methods used for the compaction of molding masses composed of either technical ceramics or ceramic matrix composites reinforced with carbon nanotubes are surveyed. This stage that precedes debinding and sintering plays the key role in getting pore-free equal-density ceramics at the scale of mass production. The methods include: compaction in sealed and collector molds, cold isostatic and quasi-isostatic compaction; dynamic compaction methods, such as magnetic pulse, vibration, and ultrasonic compaction; extrusion, stamping, and injection; casting from aqueous and non-aqueous slips; tape and gel casting. Capabilities of mold-free approaches to produce precisely shaped ceramic bodies are also critically analyzed, including green ceramic machining and additive manufacturing technologies.

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Uniaxial compaction of nanopowders on a magnetic-pulse press

Cited by 18 publications

References 6 publications

Direct Electrophoretic Deposition and Characterization of Thin-Film Membranes Based on Doped BaCeO3 and CeO2 for Anode-Supported Solid Oxide Fuel Cells

Direct Electrophoretic Deposition and Characterization of Thin-Film Membranes Based on Doped BaCeO3 and CeO2 for Anode-Supported Solid Oxide Fuel Cells

Structural, Mechanical, and Tribological Characterization of Magnetic Pulse Compacted Fe–Cu Bimetallic Particles Produced by Electric Explosion of Dissimilar Metal Wires

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

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