Influence of premolding pressure in electric-discharge sintering on the physicomechanical properties of a copper-tin-abrasive composite

Istomina, T. I.; Baidenko, A. A.; Raichenko, A. I.; Goldberg, M. A.; Svechkov, A. V.

doi:10.1007/bf00805559

Cited by 11 publications

(4 citation statements)

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“…Raichenko et al [ 90 , 91 , 92 ], Svechkov et al [ 93 ], Baidenko et al [ 94 , 95 , 96 ] and Ryabinina et al [ 97 , 98 ] conducted a large number of experiments using this set-up.…”

Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

et al. 2013

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This paper reviews research articles published in the former USSR and post-soviet countries on the consolidation of powder materials using electric current that passes through the powder sample and/or a conductive die-punch set-up. Having been published in Russian, many of the reviewed papers are not included in the mainstream electronic databases of the scientific articles and thus are not known to the scientific community. The present review is aimed at filling this information gap. In the paper, the electric current-assisted sintering techniques based on high- and low-voltage approaches are presented. The main results of the theoretical modeling of the processes of electromagnetic field-assisted consolidation of powder materials are discussed. Sintering experiments and related equipment are described and the major experimental results are analyzed. Sintering conditions required to achieve the desired properties of the sintered materials are provided for selected material systems. Tooling materials used in the electric current-assisted consolidation set-ups are also described.

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“…Raichenko et al [ 90 , 91 , 92 ], Svechkov et al [ 93 ], Baidenko et al [ 94 , 95 , 96 ] and Ryabinina et al [ 97 , 98 ] conducted a large number of experiments using this set-up.…”

Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

et al. 2013

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“…Some years later came the studies by Taylor [2] (in 1933) and Lenel [3] (in the 1950s), who called this technique electrical resistance sintering under pressure (ERS). Later, during the 70s and 80s, and mainly by Soviet and Japanese researchers, the ERS technique received a new impulse [4][5][6][7][8][9][10][11]. At present, many international researchers study different modalities of field assisted sintering techniques (FAST), which is the common name used for these powder metallurgy (PM) electrical consolidation techniques.…”

Section: Introductionmentioning

confidence: 99%

Influence of Processing Parameters on the Conduct of Electrical Resistance Sintering of Iron Powders

Fernández

Astacio

Caballero

et al. 2020

Metals

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The influence of the applied pressure and electrical parameters on the macrostructure of specimens consolidated by the medium-frequency electrical resistance sintering technique (MF-ERS) is analysed in this work. This technique is based on the application of pressure to a mass of conductive powder that, simultaneously, is being crossed by a high intensity and low voltage electric current. The simultaneous action of the pressure and the heat released by the Joule effect causes the densification and consolidation of the powder mass in a very short time. The effect of the current intensity and heating time on the global porosity, the porosity distribution, and the microhardness of sintered compacts is studied for two applied pressures (100 and 150 MPa). For the different experiments of electrical consolidation, a commercially available pure iron powder was chosen. For comparison purposes, the properties of the compacts consolidated by MF-ERS are compared with the results obtained by the conventional powder metallurgy route (cold pressing and furnace sintering). Results show that, as expected, higher current intensities and dwelling times, as well as higher pressures and the consolidation of compacts with lower aspects ratios, produce denser materials.

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“…Although experimentally tested for many years, the theoretical studies of FAST techniques are very limited. Some of the first studies [11][12][13][14][15][16][17][18] come from the former USSR, with more recent advances being carried out in the context of the SPS technique [19][20][21][22][23][24][25][26]. A theoretical onedimensional model of ERS technique can be found in [27].…”

Section: Introductionmentioning

confidence: 99%

Modelling and Simulation of the Electrical Resistance Sintering Process of Iron Powders

et al. 2019

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In this paper, the process known as Electrical Resistance Sintering under Pressure is modelled, simulated and validated. This consolidation technique consists of applying a highintensity electrical current to a metallic powder mass under compression. The Joule effect acts heating and softening the powders at the time that pressure deforms and makes the powder mass to densify. The proposed model is numerically solved by the finite elements method, taking into account the electrical-thermal-mechanical coupling present in the process. The theoretical predictions are validated with data recorded by sensors installed in the electrical resistance sintering equipment during experiments with iron powders. The reasonable agreement between the theoretical and experimental curves regarding the overall porosity and electrical resistance suggests that the model reproduces the main characteristics of the process. Also, metallographic studies on porosity distribution confirm the model theoretical predictions. Once confirmed the model and simulator efficiency, the evolution of the temperature and the porosity fields in the powder mass and in the rest of elements of the system can be predicted. The influences of the processing parameters (intensity, time and pressure) as well as the die material are also analyzed and discussed.

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Influence of premolding pressure in electric-discharge sintering on the physicomechanical properties of a copper-tin-abrasive composite

Cited by 11 publications

References 1 publication

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

Influence of Processing Parameters on the Conduct of Electrical Resistance Sintering of Iron Powders

Modelling and Simulation of the Electrical Resistance Sintering Process of Iron Powders

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