2011 Fiscal Year Final Research Report
Fabrication of Carbon Nanotube-Reinforced Aluminum Matrix Composites by SPS Pre-sintering and Hot Extrusion
| Project/Area Number |
21360353
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Tohoku University |
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Principal Investigator |
KAWASAKI Akira 東北大学, 大学院・工学研究科, 教授 (50177664)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 粉末冶金 |
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| Research Abstract |
Aluminum/carbon nanotube (CNT)composites have been fabricated by a combination of spark plasma sintering and hot-extrusion processes. The CNTs were well dispersed onto Al particles by nanoscale dispersion method. The highly densified CNT composites were prepared by spark plasma sintering and subsequent hot extrusion. Microstructural observations by optical, fieldemission scanning electron and high-resolution transmission electron microscopies confirmed that the sintered Al/CNT compact and extruded bulk material has a good dispersion of oriented CNTs. Raman spectroscopy showed that the processing restrained damage to the CNTs. A small amount of transient Al liquid phase was formed during SPS sintering, which may assist the densification as well as good contact between CNT and aluminum matrix. As a result, the composites exhibited three times larger tensile strength than pure aluminum because of the effective load transfer from the matrix to the CNTs.
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