Fabrication and Characterization of Aluminum-Carbon Nanotube Powder and Polycarbonate/Aluminum-Carbon Nanotube Composites
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- Fabrication and Characterization of Aluminum-Carbon Nanotube Powder and Polycarbonate/Aluminum-Carbon Nanotube Composites
- Hwang, San Ha; Bang, Dae-Suk; Yoon, Kwan Han; Park, Young-Bin; Lee, Dae-Yeol; Jeong, Sung-Sil
- Aluminum flakes; Carbon-nanotube composites; Cnt nano composites; Electrical property; Electrical resistivity; Filler contents; Higher frequencies; Low frequency range; Percolation thresholds; Reinforced aluminum; Rheological property; Scanning Electron Microscope; Tensile moduli; Thermal properties; Twin screw extruders
- Issue Date
- SAGE PUBLICATIONS LTD
- JOURNAL OF COMPOSITE MATERIALS, v.44, no.23, pp.2711 - 2722
- Carbon nanotube reinforced aluminum powders (Al-CNT) were fabricated by ball milling. The morphology observed by a scanning electron microscope showed impregnation of CNTs on the surface of aluminum flakes (Al-flakes). Polycarbonate (PC)/Al-CNT nanocomposites were prepared by a twin-screw extruder. The electrical resistivity of PC/Al-flake composites did not change with Al-flake content, while that of PC/CNT nanocomposites decreased with increasing CNT content, and the percolation threshold was obtained at 2wt% CNT loading. The electrical resistivity of PC/Al-CNT nanocomposites showed a behavior similar to PC/CNT nanocomposites. The thermal conductivity of the composites increased with increasing filler contents. The PC/Al-CNT composites showed a viscosity trend that is similar to PC/CNT composites; however, it showed higher viscosities (G*, G '') than PC/Al-flake composites in the low frequency range (up to similar to 10 Hz) and lower viscosities in the higher frequency range (>10 Hz). The tensile modulus of PC/Al-CNT composite increased while the strength decreased with increasing filler content. The modulus of PC/Al-CNT composite was higher than PC/CNT and PC/Al-flake composites.
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