Özet:

In this study, nano zirconium dioxide (ZrO2) or silicon dioxide (SiO2) reinforced aluminum based composites with various contribution ratios (SiO2: 1-9wt.%, ZrO2: 1-12wt.%) were produced via the powder metallurgy method. The phase structure, compressive strength, hardness, density, and microstructure of the prepared specimens are examined by X-ray diffraction device, compression testing machine, micro Vickers hardness test device, Archimedes’ density measurement kit, and scanning electron microscope, respectively. As a result of the tests performed, the densest microstructure and the superior mechanical properties were obtained at the Al-9%ZrO2 (compressive strength: 288 MPa, hardness: 69 HV) and Al-6%SiO2 (compressive strength: 267 MPa, hardness: 50 HV) composites. Compared to pure aluminum, the compressive strength and hardness of Al-6%SiO2 composite were improved by 44.3%, 66.7%. On the other hand, the compressive strength and hardness of Al-9%ZrO2 composite were enhanced by 55.7%, 130%. Consequently, it was detected that ZrO2 particles are more effective compared to SiO2 particles for the same reinforcement ratio in improving the mechanical properties of the aluminum matrix.

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