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Properties of aluminium/electroless ni-coated sic composites - a review

Odiwo, H. and Bello, K. A and Abdulwahab, M and Adebisi, A. A. and Maleque, Md. Abdul (2021) Properties of aluminium/electroless ni-coated sic composites - a review. FUDMA Journal of Sciences, 5 (1). pp. 381-394. ISSN 2645-2944 E-ISSN 2616-1370

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The combination of properties of Al/SiC composites make them very attractive materials for applications in automotive and aerospace industries. Several techniques are used in developing Al/SiC composites but stir casting process is most commonly used because it is the simplest and cost effective technique. However, composites produced via stir casting suffer from limitations such as low wettability and inadequate bonding between the molten Al & SiC particulates and the formation of degrading interfacial products like aluminum carbide (Al4C3) which degrades the mechanical properties of the composite. Some of the techniques to improve Al-SiC wettability include addition of surface active elements such as magnesium, heat treatment of particles and application of metallic coating on the reinforcements before addition to the melt. Wetting agents alter the composition of the matrix alloy, while heat treatment of the reinforcement does not completely prevent the formation of Al4C3 when utilized. To reduce the direct interaction and promote wetting between reinforcements and molten aluminum during processing, the surface of SiC particulates can be modified by coating via oxidation, sol-gel and electroless processes. Of all these methods, electroless nickel deposition produces the best coatings with uniform thickness and adequate strength. In the present study, influence of electroless nickel-coating of SiC on the mechanical, corrosion and microstructural properties of Al/SiC composite has been evaluated. Finally, it can be concluded that the Ni and Ni3P intermetallic phases produced via electroless coating improves the wettability between the SiC and molten aluminium leading to enhanced properties of the composite.

Item Type: Article (Review)
Additional Information: 6103/90623
Uncontrolled Keywords: Aluminium, silicon carbide, electroless nickel, coating, composites.
Subjects: T Technology > T Technology (General) > T173.2 Technological change
T Technology > TJ Mechanical engineering and machinery > TJ163.26 Energy conservation
T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Prof Dr. Md Abdul Maleque
Date Deposited: 06 Jul 2021 12:29
Last Modified: 06 Jul 2021 12:29
URI: http://irep.iium.edu.my/id/eprint/90623

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