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Journal of Engineering and Applied Sciences

ISSN: Online 1818-7803
ISSN: Print 1816-949x
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Effects of Natural Rock and Nano-TiO2 Additives on Al2 O3 Layer Deposited on Al Alloys by Micro-Arc Oxidation (MAO)

Elham Abdalmajeed, Samir Hamid Awad and Farqad Saleem Murad
Page: 1201-1209 | Received 21 Sep 2022, Published online: 21 Sep 2022

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https://doi.org/10.36478/jeasci.2018.1201.1209

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Abstract

Ceramic coatings on Al alloys were prepared via. micro arc oxidation process using natural rock (10 g/L fired and unfired porcelanite) and (2.4 g/L) nano-TiO2 additives. The phase composition, microstructure (SEM and EDX), micro hardness, thickness, roughness and wear resistance of the coatings were studied. The results showed that the thick and hard (γ-Al2 O3 ceramic coatings can be deposited by MAO process on Al alloys using electrolytes contained fired porcelanite with modified tribological properties and less porosity and its non-uniform distribution in the structure. The addition of nano-TiO2 recorded the highest hardness and reduced the pore size and tunnels in coatings structure.

How to cite this article:

Elham Abdalmajeed, Samir Hamid Awad and Farqad Saleem Murad. Effects of Natural Rock and Nano-TiO2 Additives on Al2 O3 Layer Deposited on Al Alloys by Micro-Arc Oxidation (MAO).
DOI: https://doi.org/10.36478/jeasci.2018.1201.1209
URL: https://www.makhillpublications.co/view-article/1816-949x/jeasci.2018.1201.1209