Science of Sintering 2022 Volume 54, Issue 2, Pages: 177-187
https://doi.org/10.2298/SOS2202177O
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Investigation of the microstructure-hardness and wear performances of hybrid/composite materials Al2O3/SiC particle reinforced in AA 7075 matrix
Özkan Zübeyde (University of Gazi, Institute of Science, Department of Advanced Technologies, Ankara, Turkey), hakan1440@gmail.com
Gökmeşe Hakan (University of Necmettin Erbakan, Seydisehir Ahmet Cengiz Faculty of Engineering Seydisehir-Konya, Turkey)
Gökmen Uğur (University of Gazi,Vocational School of Technical Sciences, Ankara, Turkey)
As a result of advances in science and technology, the importance of metal
matrix composite materials is increasing gradually today. However, in many
studies, composite production is carried out with monotype ceramic particle
reinforcement. In this study, the production, microstructure-hardness, and
wear performance of composite-hybrid materials that had AA 7075 aluminum
powder metal matrix and were reinforced by SiC and Al2O3 ceramic particles
at different ratios were examined. The prepared Matrix and reinforcement
powder mixtures were mixed for half an hour in the three-axis Turbula T2F
type mixer and then, pressed unidirectionally and cylindrically under the
pressure of 700 MPa. The pressed samples were sintered for 1 h at a
temperature of 600oC in the argon atmosphere. Microstructure examinations
were carried out using SEM (Scanning Electron Microscope) and optical
microscope devices, while hardness measurements were obtained as a result of
Brinell measurement. Wear performance of the test samples were tested in the
Pin-on-disk type device at 10 N load and 500 rpm rotation speed by depending
on the wear distances at 1000, 1500 and 2000 m. It was observed that
hardness increased as the amount of ceramic particle in composite-hybrid
samples increased. As a result of wear tests, in hybrid composites, compared
to single-phase ceramic particle reinforced composites, weight losses
increased depending on the increase in the reinforcement amount.
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