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논문 기본 정보

자료유형
학술저널
저자정보
V. Gholipour (Isfahan University of Technology) M. Shamanian (Isfahan University of Technology) A. Ashrafi (Isfahan University of Technology) A. Maleki (Isfahan University of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.9
발행연도
2021.9
수록면
3,681 - 3,694 (14page)
DOI
10.1007/s12540-020-00791-w

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It is well-known that Al matrix nanocomposites are always more expensive compared to conventional materials. In this study,the Al matrix composite containing montmorillonite Nanoclay reinforcement has been synthesized, which is cheaper andmore abundant than other reinforcements. Powder metallurgy and extrusion process were employed for the production of thenanocomposite samples containing 0%, 1%, 2%, 6%, and 10% Nanoclay. Microstructural evaluations were carried out by usingoptical and scanning electron microscopy. Phase investigation was done by using X-ray diffraction and energy-dispersiveX-ray spectrometer methods. Mechanical evaluations including macro- and micro-hardness, density evaluation, tensile andcompression tests were also conducted. It was revealed that aluminium-clay nanocomposite properties were higher than themonolithic type. According to the obtained results, the addition of montmorillonite Nanoclay caused improvement of themechanical properties, due to the mechanisms like Orowan and thermal expansion mismatch between reinforcement andthe matrix. Thus, the ultimate tensile strengths of 1%, 2%, 6%, and 10% Nanoclay samples were increased about 31%, 46%,62%, and 95%, respectively, than 0% Nanoclay specimen. The sample containing 2% Nanoclay represented the optimumproperties which were the increase in hardness, tensile and compressive strengths about 63%, 46% and 53%, respectively. The increase in the Nanoclay content of the Al matrix changed the complete ductile fracture mode to the shear ductile type.

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