DOI: 10.5176/2251-1857_M318.31
Authors: S.G. Shabestari and F. Rikhtegar
Abstract: In current work, the semi-wet (SW) and slurry based (SB) methods were applied to synthesize Al-1.5wt.%CNT nanocomposites powder. The initial 30 mm diameter compacted billets were produced through cold pressing and pressure-less sintering at 550oC for 2h for both types of nanocomposites. The billets were hot extruded at 400oC to produce 10 mm diameter rods. The synthesis parameters of composites were investigated through experiments of tension, compression, FTIR, and STA. The dispersion of CNTs within Al powder and fracture surface analysis was studied through FE-SEM. The yield and tensile strength of pure Al sample were measured as 90 and 136 MPa, respectively. These values were increased to 110 and 170 MPa for SW sample and improved to 152 and 203 MPa for SB product, by adding 1.5wt.% CNT to pure Al. According to the fracture surface analysis, the bridging and CNTs fracture phenomena were observed in SB specimen and CNTs pull out was detected for SW sample.
Keywords: Nanocomposites, Carbon nanotubes, Mechanical
properties, Powder processing
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