TY - GEN
T1 - Fabrication of carbon nanotube reinforced aluminum composite by powder extrusion process
AU - Yuuki, Junichi
AU - Kwon, Hansang
AU - Kawasaki, Akira
AU - Magario, Akira
AU - Noguchi, Toru
AU - Beppu, Junichi
AU - Seki, Masayuki
PY - 2007/1/1
Y1 - 2007/1/1
N2 - This paper describes a fabrication process of Al/CNT composites and investigated their mechanical properties. CNT is a very useful reinforcement for composites since it has a very high strength and very high Young's modulus. However, it is very difficult to distribute CNT in a metal matrix. Natural rubber was used as an elastomer and mixed with Al powder and CNT precursors to improve the distribution of the CNT in Al matrix. The resulting powder mixture was filled into Al alloy billets and encapsulated in vacuum atmosphere. The billets were then extruded with different extrusion ratios of 5, 10 and 20 at 673K. The composites were observed under optical microscope and FE-SEM, and the mechanical properties were evaluated by Vickers hardness and tensile tests. We succeeded in obtaining fully densified and finely extruded rod of Al/CNT composites of well distributed CNT by hot extrusion process. Observation of post extrusion micro structures revealed that CNT were not damaged by the hot extrusion process and their Vickers hardness and tensile strengths obtained were about twice compared to pure Al.
AB - This paper describes a fabrication process of Al/CNT composites and investigated their mechanical properties. CNT is a very useful reinforcement for composites since it has a very high strength and very high Young's modulus. However, it is very difficult to distribute CNT in a metal matrix. Natural rubber was used as an elastomer and mixed with Al powder and CNT precursors to improve the distribution of the CNT in Al matrix. The resulting powder mixture was filled into Al alloy billets and encapsulated in vacuum atmosphere. The billets were then extruded with different extrusion ratios of 5, 10 and 20 at 673K. The composites were observed under optical microscope and FE-SEM, and the mechanical properties were evaluated by Vickers hardness and tensile tests. We succeeded in obtaining fully densified and finely extruded rod of Al/CNT composites of well distributed CNT by hot extrusion process. Observation of post extrusion micro structures revealed that CNT were not damaged by the hot extrusion process and their Vickers hardness and tensile strengths obtained were about twice compared to pure Al.
KW - Carbon nanotube reinforced aluminum composite
KW - Mechanical properties
KW - Powder extrusion process
UR - http://www.scopus.com/inward/record.url?scp=38349185027&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349185027&partnerID=8YFLogxK
U2 - 10.4028/0-87849-419-7.889
DO - 10.4028/0-87849-419-7.889
M3 - Conference contribution
AN - SCOPUS:38349185027
SN - 0878494197
SN - 9780878494194
T3 - Materials Science Forum
SP - 889
EP - 892
BT - Progress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006)
PB - Trans Tech Publications Ltd
T2 - 2006 Powder Metallurgy World Congress and Exhibition, PM 2006
Y2 - 24 September 2006 through 28 September 2006
ER -