عنوان مقاله [English]
In this paper, effects of porosity of pure Al and Al2024 matrix nanocomposite reinforced with carbon nanotubes, sintering parameters such as temperature and consolidation methods of nanocomposite on its properties have been studied. For this purpose, powder composite was prepared using flake powder metallurgy, dispersing particles with ultrasonic and chemical mixing. Consequently, nanocomposites were produced based on two strengthening procedures of spark plasma sintering and cold press-sintering. Finally, the samples were treated under hot extrusion in order to improve mechanical properties. Densitometry, hardness test and metallography were performed on final products. It was concluded that properties of nanocomposites produced by SPS were better than those manufactured by cold press-sintering and also porosity of nanocomposites, which were hot extruded, has been decreased and their hardness has been increased. Hardness and porosity of Al-1.5%wt.CNT, produced by SPS and hot extruded, were measured 62.45 HB and 1% respectively. In order to investigate the formation of aluminum carbide in the interface, Raman spectroscopy and XRD were used and no peak for carbide appeared in both of the experiments.
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