Effects of a pulsating electric current on the physicomechanical properties of copper powder

1974 ◽  
Vol 13 (7) ◽  
pp. 523-526
Author(s):  
N. P. Litvishko ◽  
N. S. Rygalova ◽  
A. M. Ozerov
Keyword(s):  
Electric Current ◽  
Copper Powder ◽  
Physicomechanical Properties

Physicomechanical properties and microstructure of roll-compacted copper powder strip

1974 ◽  
Vol 13 (11) ◽  
pp. 917-921
Author(s):  
O. A. Katrus ◽  
A. V. Aleshina ◽  
A. V. Perepelkin
Keyword(s):  
Copper Powder ◽  
Physicomechanical Properties ◽  
Powder Strip

scholarly journals Effect of Electric Current on SPS Densification of Spherical Copper Powder

2021 ◽  
Vol 5 (4) ◽  
pp. 119
Author(s):  
Romaric Collet ◽  
Sophie Le Gallet ◽  
Frédéric Charlot ◽  
Sabine Lay ◽  
Jean-Marc Chaix ◽  
...  
Keyword(s):  
Electric Current ◽  
Copper Powder ◽  
Pure Copper ◽  
Joule Effect ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Significant Temperature ◽  
Two Parameters ◽  
A Current

When a current is involved, as in spark plasma sintering, metallic powders are heated by the Joule effect through both tool and specimen. Other mechanisms might occur, but it is difficult to separate the role of the temperature from the role of the current inside the sample as, in most cases, the two parameters are not controlled independently. In this paper, the consolidation and the densification of a pure copper powder were studied in three configurations for obtaining different electric current paths: (i) current flowing through both the powder and the die, (ii) current forced into the powder and (iii) no current allowed in the powder. Electrical conductivity measurements showed that even low-density samples displayed higher conductivities than graphite by several orders of magnitude. FEM simulations confirmed that these copper specimens were mainly heated by the graphite punches. No modification of the microstructure by the flow of current could be observed. However, the absence of current in the specimen led to a decrease in densification. No significant temperature difference was modeled between the configurations, suggesting that differences are not linked to a thermal cause but rather to a current effect.

Effect of Process Parameters on the Electrically-Assisted Sintered Iron-Copper Powder Metals

2018 ◽  
Author(s):  
Ihab Ragai ◽  
Matt Schwabenbauer ◽  
Seray Eser ◽  
Michael Müller
Keyword(s):  
Electric Current ◽  
Process Parameters ◽  
Copper Powder ◽  
Cost Effective ◽  
Powder Metal ◽  
Sintered Iron ◽  
Iron Copper ◽  
Conventional Sintering ◽  
Microstructure Examination

Electric-current-assisted sintering (ECAS) is a novel process that can potentially replace the conventional sintering method. It is hypothesized that the process can reduce the sintering time and can be used in situ; thus, can be more cost effective. The purpose of this research is to investigate the effect of direct current on the sintered properties of iron-copper powder metal. Experiments were conducted at various conditions to determine the optimal process parameters for this particular powder metal. The parameters investigated were electric current levels and energizing time. Experiments also included sintering the powder using a conventional furnace. Samples from both types of experiments were compared to determine the metallurgical differences due to the sintering process. Mechanical and microstructure examination were conducted to aid in determining the feasibility of ECAS.

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