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Original scientific paper

EFFECT OF PARTICLE SHAPE AND SIZE OF COPPER POWDERS ON THE PROPERTIES OF SINTERED PARTS

By
Ivana Marković ,
Ivana Marković
Contact Ivana Marković

Technical Faculty in Bor, University of Belgrade, Belgrade, Serbia

Stevan Trujić ,
Stevan Trujić

TECHNICAL FACULTY IN BOR, University of Belgrade, Belgrade, Serbia

Dragan manasijević ,
Dragan manasijević

Technical Faculty in Bor, University of Belgrade, Belgrade, Serbia

Ljubiša Balanović ,
Ljubiša Balanović

Technical Faculty in Bor, University of Belgrade, Belgrade, Serbia

Uroš Stamenković ,
Uroš Stamenković

Technical Faculty in Bor, University of Belgrade, Belgrade, Serbia

Milijana Mitrović
Milijana Mitrović

Technical Faculty in Bor, University of Belgrade, Belgrade, Serbia

Abstract

The particle shape and size of the starting powders represent the most important physical properties, on which the quality of the compacts and final sintered products depends. Two types of powder were analyzed in the paper - electrolytic copper powder with a dendritic particle shape and water-atomized copper powder with an irregular particle shape. The starting powders were sieved through a sieve system with openings of 45 μm, 80 μm, and 120 μm. The characterization of the obtained fractions of both powders was performed by determining the shape and dimensions of the particles using SEM microscopy in combination with ImageJ software, and the apparent density and flow rate were determined using the Hall flowmeter funnel. Pressing of each powder fraction was done using a pressure of 600 MPa. The compacts were further sintered at 1000°C for 2 hours to obtain the final sintered parts. After sintering, their density, hardness, and electrical conductivity were determined and their microstructure was analyzed. The results indicate a great influence of the characteristics of the starting powders on the properties of the final parts obtained by the powder metallurgy route. The particle shape of the powders had a more pronounced influence compared to the particle size.

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Citation

Funding Statement

The research presented in this paper was done with the financial support of the Ministry of Science, Technological Development and Innovations of the Republic of Serbia, with the funding of the scientific research work at the University of Belgrade, Technical Faculty in Bor, according to the contract with registration number 451-03-47/2023-01/200131.

Authors retain copyright. This work is licensed under a Creative Commons Attribution 4.0 International License. Creative Commons License

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