Abstract
We have increased the tensile strength without compromising the elongation of aluminum (Al)-carbon nanotube (CNT) composite by a combination of spark plasma sintering followed by hot-extrusion processes. From the microstructural viewpoint, the average thickness of the boundary layer with relatively low CNT incorporation has been observed by optical, field-emission scanning electron, and high-resolution transmission electron microscopies. Significantly, the Al-CNT composite showed no decrease in elongation despite highly enhanced tensile strength compared to that of pure Al. We believe that the presence of CNTs in the boundary layer affects the mechanical properties, which leads to well-aligned CNTs in the extrusion direction as well as effective stress transfer between the Al matrix and the CNTs due to the generation of aluminum carbide.
Original language | English |
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Pages (from-to) | 546-550 |
Number of pages | 5 |
Journal | Composites Science and Technology |
Volume | 70 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 Mar 1 |
Keywords
- A. Metal-matrix composites (MMCs)
- B. Mechanical properties
- Carbon nanotubes
- E. Powder processing
ASJC Scopus subject areas
- Ceramics and Composites
- Engineering(all)