Surface and Tribological Properties of Oxide Films on Aluminium Alloy through Fly-Ash Reinforcement

Hard anodizing has proven to be a helpful surface treatment for aluminium alloy and typically accompanied by the growth of a porous and highly flawed oxide layer. The presence of pores on the oxide surface can be taken as an advantage in improving the surface properties. Fly-ash particles are high i...

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Veröffentlicht in:Coatings (Basel) 2022-02, Vol.12 (2), p.256
Hauptverfasser: Mat Tahir, Noor Ayuma, Liza, Shahira, Fukuda, Kanao, Mohamad, Syazwani, Hashimi, Mohd Zakir Fathi, Yunus, Mohd Saifulnizam Mohd, Yaakob, Yazid, Othman, Intan Sharhida
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container_issue 2
container_start_page 256
container_title Coatings (Basel)
container_volume 12
creator Mat Tahir, Noor Ayuma
Liza, Shahira
Fukuda, Kanao
Mohamad, Syazwani
Hashimi, Mohd Zakir Fathi
Yunus, Mohd Saifulnizam Mohd
Yaakob, Yazid
Othman, Intan Sharhida
description Hard anodizing has proven to be a helpful surface treatment for aluminium alloy and typically accompanied by the growth of a porous and highly flawed oxide layer. The presence of pores on the oxide surface can be taken as an advantage in improving the surface properties. Fly-ash particles are high in SiO2 and Al2O3 content and can be utilized as inexpensive strengthening particles, which can increase the wear resistance and microhardness of composite material. It was noticed that limited research had been carried out in utilizing fly-ash as reinforcement on composite oxide coating as a wear resistance candidate. Thus, this study focused on reinforcing fly-ash on oxide coating and investigating its tribological performance. The composite oxide coating was grown on AA2017 aluminium alloy through anodizing process. To understand the effect of anodizing time and fly-ash content, the parameters were varied from 5–60 min and 0–50 g/L, respectively. The findings suggested that 60 min of anodizing time provides the highest thickness and surface roughness at 35 µm and 6.5 µm, respectively. Interestingly, composite oxide coating with 50 g/L fly-ash provides the highest coating thickness but has the lowest roughness at 52 μm and 8.2 μm, respectively. The composite oxide coatings are observed to reduce friction only for a limited time, despite their potential in significantly reducing the wear rate. The wear mechanism observed was adhesion, micro-crack, and delamination. The findings of this study are believed to provide insight on the potential of fly-ash to be a reinforcement for wear-reduction materials.
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source MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Alloys
Aluminum base alloys
Aluminum oxide
Anodizing
Ashes
Composite materials
Corrosion resistance
Fly ash
Friction reduction
Hard anodizing
Lubricants & lubrication
Mechanical properties
Metal fatigue
Microcracks
Microhardness
Oxide coatings
Protective coatings
Reinforcement
Silicon dioxide
Surface properties
Surface roughness
Surface treatment
Thickness
Tribology
Wear mechanisms
Wear rate
Wear resistance
title Surface and Tribological Properties of Oxide Films on Aluminium Alloy through Fly-Ash Reinforcement
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