Electromagnetic interference shielding effectiveness of in situ-synthesized ultrafine SiC- and Al2O3-reinforced AA6061 aluminum matrix composites

This study produced silicon carbide (SiC) and aluminum oxide (Al 2 O 3 ) particulates using an in situ reaction system of silicon dioxide (SiO 2 )+ carbon (C)+ aluminum (A)l with a molten aluminum alloy. The reaction system was examined through differential scanning calorimetry (DSC). The in situ-fa...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2022-03, Vol.33 (7), p.3774-3785
Main Authors: Pushpa, Thomas Anita Jones Mary, Selvam, Jebaraj David Raja, Dinaharan, Isaac, Peter, Eby
Format: Article
Language:English
Subjects:
Aluminum
Aluminum base alloys
Aluminum matrix composites
Aluminum oxide
Characterization and Evaluation of Materials
Chemistry and Materials Science
Differential scanning calorimetry
Electromagnetic shielding
Electron backscatter diffraction
Emission analysis
Field emission microscopy
Heat transmission
Materials Science
Mechanical properties
Optical and Electronic Materials
Particulate composites
Particulates
Photomicrographs
Silicon carbide
Silicon dioxide
Synthesis
Ultrafines
X-ray diffraction
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Summary:This study produced silicon carbide (SiC) and aluminum oxide (Al 2 O 3 ) particulates using an in situ reaction system of silicon dioxide (SiO 2 )+ carbon (C)+ aluminum (A)l with a molten aluminum alloy. The reaction system was examined through differential scanning calorimetry (DSC). The in situ-fabricated aluminum matrix composites (AMCs) were analyzed through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), electron backscatter diffraction (EBSD), and transmission electron microscope (TEM). The electromagnetic (EM) shielding effectiveness of the fabricated AMCs was measured in the frequency of 1–5 GHz. The heat flow curve obtained from the DSC analysis revealed the temperature required to attain the reaction. The XRD pattern confirmed the formation of SiC and Al 2 O 3 particulates. FESEM micrographs confirmed that the SiC and Al 2 O 3 particulates were distributed along the intergranular region in the AMCs. The in situ-synthesized submicron-level particulates enhanced the mechanical properties of the composites. The hybrid AMCs exhibited considerable EM shielding effectiveness.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-07569-9