Fabrication of dual-nanoparticles gradient layers-reinforced aluminum matrix composite materials by hot-pressing process

Fabrication of dual-nanoparticles gradient layers-reinforced aluminum matrix composite materials by hot-pressing process

Kwon, Hansang; Kim, Seungjin; Kim, Kyungju; Leparoux, Marc; Kawasaki, Akira; Kim, Kwonhoo

Abstract:

Carbon nanotubes (CNT) and nano silicon carbide (n-SiC) gradient layers reinforced aluminum (Al) matrix composite materials have been fabricated by mechanical ball milling followed by hot-pressing. The n-SiC was used as a mixing active agent for dispersing the CNT in the Al powder. The hardness of the produced composites was dramatically increased up to eight times higher than bulk pure Al with increasing the amount of nano-SiC particles. A small quantity of aluminum carbide (Al4C3) was observed by high resolution transmission electron microscopy and relatively quantified usingX-ray diffraction. Beside the enhancement of the composite hardness due to the CNT and the nano-SiC, the Al4C3seems to play also a role. This powder metallurgical gradient layers approach also could be applied to other nano-reinforced composites such as ceramics or complex matrix materials.

Carbon nanotubes (CNT) and nano silicon carbide (n-SiC) gradient layers reinforced aluminum (Al) matrix composite materials have been fabricated by mechanical ball milling followed by hot-pressing. The n-SiC was used as a mixing active agent for dispersing the CNT in the Al powder. The hardness of the produced composites was dramatically increased up to eight times higher than bulk pure Al with increasing the amount of nano-SiC particles. A small quantity of aluminum carbide (Al4C3) was observed by high resolution transmission electron microscopy and relatively quantified usingX-ray diffraction. Beside the enhancement of the composite hardness due to the CNT and the nano-SiC, the Al4C3seems to play also a role. This powder metallurgical gradient layers approach also could be applied to other nano-reinforced composites such as ceramics or complex matrix materials.

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Kwon, Hansang; Kim, Seungjin; Kim, Kyungju; Leparoux, Marc; Kawasaki, Akira; Kim, Kwonhoo; "Fabrication of dual-nanoparticles gradient layers-reinforced aluminum matrix composite materials by hot-pressing process", p-58-58. In: Proceedings of the 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials [=Blucher Material Science Proceedings, v.1, n.1]. São Paulo: Blucher, 2014.
ISSN 23589337, DOI