Abstract
The objective of this work is to evaluate the corrosion behaviour of nanographene oxide reinforced aluminium (Al/GO) metal matrix composites with different immersion time periods using the immersion corrosion technique. The Al/GO composites were fabricated by the ultrasonic gravitational stir casting process. The corrosions of Al/GO were evaluated using a scanning electron microscope. The experimental results revealed that the corrosion rate decreased and weight losses increased with increasing immersion time periods. The nonimmersed Al/GO composites exhibited higher microhardness values compared to the immersed Al/GO composites.
Highlights
Aluminium-based metal matrix composites (AMMCs) are used mainly for manufacturing various engineering components in aerospace, automotive, defense, and other domestic applications because they have superior mechanical properties and are lightweight and have good dimensional stability
The following results can be inferred from this experimental work: (1) From the SEM micrograph analysis, the nanographene oxide particles were seen distributed uniformly in the Al matrix
A number of corrosion pits were observed in the Al matrix region and the interfacial region
Summary
Aluminium-based metal matrix composites (AMMCs) are used mainly for manufacturing various engineering components in aerospace, automotive, defense, and other domestic applications because they have superior mechanical properties and are lightweight and have good dimensional stability. The solid state method is used to fabricate a few shapes of composite components and is not suitable for the fabrication of complex-shaped components [3]. This method is not used in many industries; the conventional stir casting method is widely used in many industries [4] because stir casting is a simple technique, has more flexibility, and has more thermodynamic stability for the ceramic particles to be distributed uniformly in the matrix liquid at high temperatures producing a strong interfacial bond between the reinforcement and the matrix materials [5]. The ultrasonic stir casting technique is best suitable for the fabrication of nanocomposite materials
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