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Research Article

Influence of alumina and zinc oxide nanoparticles on microstructure and electro-mechanical properties of aluminum metal matrix composites fabricated by customized two-step stir casting method

Md Jalal Uddin Rumi1, Muhammad Muzibur Rahman2

1Dept. of Aeronautical Eng., Military Institute of Science and Technology, Bangladesh
2Dept. of Mechanical Eng., Sonargaon University, Bangladesh

Keywords

Abstract


Aluminum Composite; 

Stir Casting; 

Mechanical behavior; 

Electrical Conductivity; 

Microstructure


The present paper reports the influence of Alumina (Al2O3) and Zinc Oxide (ZnO) nanoparticles on the microstructure and electro-mechanical properties of aluminum metal matrix composites (Al MMCs) fabricated by a customized two-step stir casting method. Two types of Al MMCs were developed, (i) Al MMC-01 having 97.5 wt. % of Al and 2.5 wt. % of Al2O3 and (ii) Al MMC-02 having 95 wt. % of Al, 2.5 wt. % of Al2O3 and 2.5 wt. % of ZnO. The microstructures of Al MMC-1 and Al MMC-2 observed in a Scanning electron microscope (SEM) have affirmed the uniform distribution of Al2O3 and ZnO in the metal matrix composites. It has been observed that the addition of 2.5% Al2O3 has improved the hardness, flexural strength, and impact toughness of Al composite significantly compared with pure Al. Furthermore, both bulk and micro hardness of Al MMC-02 have also increased significantly. However, impact strength, flexural strength, modulus of elasticity, and electrical conductivity of Al MMC-02 have been reduced by 12%, 52.5%, 60.8%, and 9.81% respectively in comparison with Al MMC-01 as it becomes brittle in nature for the presence of cleavage cracks, deep shear dimples, and crystallographic planes than that of Al MMC-01 as revealed by fractured surface analysis through SEM.

© 2023 MIM Research Group. All rights reserved.

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.



2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.



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The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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