Efect of particle shape and size of copper powders on the properties of sintered parts
Loading...
Date
2023
Authors
Marković, Ivana
Manasijević, Dragan
Balanović, Ljubiša
Stamenković, Uroš
Mitrović, Milijana
Trujić, Stevan
Journal Title
Journal ISSN
Volume Title
Publisher
University of Zenica, Faculty of Metallurgy and Technology
Source
Proceedings - 14th Scientific-Research Symposium with International Participation - Metallic and nonmetallic materials : production - properties - application, Zenica, Bosnia and Herzegovina, 27th-28th April 2023, 2023, 64-72
Volume
14
Issue
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.
Description
Keywords
electrolytic powders, water-atomized powders, sintering
Citation
DOI
Scopus
ISSN
2566-4344
ISBN
License
ARR