Structural characterization and corrosion behaviour of AA 2024 reinforced with carbon nanotubes and silicon hybrid metal matrix nanocomposites

Author(s):  
M. Muniyappan ◽  
N. Iyandurai ◽  
P. Duraisamy
Author(s):  
Praveennath G. Koppad ◽  
Vikas Kumar Singh ◽  
C.S. Ramesh ◽  
Ravikiran G. Koppad ◽  
K.T. Kashyap

2021 ◽  
Author(s):  
Muniyappan Mani ◽  
Iyandurai Natesan

Abstract This research work focus on the formation of AA2024-carbon nanotubes-silicon hybrid metal matrixcomposites. Structure morphology, structural characterization, elemental identification and dielectric properties of AA 2024 in the presence of carbon nanotubes, silicon andits combinations at various proportions was evaluated using SEM, XRD, EDX and Hioki 3532-50 LCR Hi-Tester. A two-stage stir casting method was used for the fabrication of AA2024 hybrid metal matrix composites. It was observed that the size of the AA 2024 + 4% CNT + 2% Si composite wasfound to be 23.6 nm, this shows enhanced results than other composites prepared. Dielectric properties of composites were characterized as a function of composition and frequency. It was found that the dielectric constant, dielectric loss and dissipation factor decreases smoothly with an increase of reinforcements and also frequency.


2011 ◽  
Vol 239-242 ◽  
pp. 759-763
Author(s):  
Saheb Nouari

Agglomeration and poor distribution/dispersion of carbon nanotubes (CNTs) within the matrix remains a major problem in processing homogeneous CNT reinforced metal matrix nanocomposites. In this work, we examine the effect of processing on the dispersion of CNTs in Al6061 and Al2124 alloy based Nanocomposites. Three methods were used to prepare the nanocomposite powders. In the first, CNTs were mixed with the prealloyed powder through dry ball milling. In the second, CNTs were sonicated then the prealloyed powder was added followed by sonication of the mixture and wet milling. In the third, the CNTs were functionalized, sonicated, and then the prealloyed powder was added followed by sonication of the mixture and wet milling. The effect of functionaliztion, sonication and type of milling on the dispersion of CNTs was evaluated.


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