The Influence of Methods for Distributing the IF-WS2 Modifier into the Structure of Al2O3 Aluminium Oxide Coatings on Their Micromechanical Properties
Joanna Korzekwa, Adrian Barylski, Mateusz Niedźwiedź, Krzysztof Cwynar, Marek Bara
TL;DR
This study explores how different methods of incorporating IF-WS2 particles into Al2O3 coatings affect their mechanical and tribological properties.
Contribution
The study introduces a method to tailor coating properties by optimizing IF-WS2 incorporation techniques and anodizing parameters.
Findings
Microhardness and Young’s modulus are not significantly affected by the incorporation method.
The interaction between anodising current density and incorporation technique influences strain energy and tribological response.
Processing parameters can be adjusted to meet specific functional requirements rather than a universal optimal setup.
Abstract
This work examines the micromechanical response of Al2O3/IF-WS2 (IF-inorganic fullerene-like) composite coatings formed on the EN AW 5251 aluminium alloy by anodic oxidation. The resulting amorphous oxide layer contains a nanopores system that can be filled with IF-WS2 particles, provided the modifier is properly dispersed. Because commercial IF-WS2 powders exhibit strong agglomeration, a high-intensity ultrasonic treatment was applied to enhance particle separation before incorporation. The influence of newly established incorporation parameters was assessed using a two-level experimental design. As part of the research, analyses of the microstructure, micromechanical, and sclerometric properties were performed. Cross-sectional SEM observations confirmed the presence of IF-WS2 within the oxide structure and revealed differences in particle distribution, depending on the incorporation…
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Taxonomy
TopicsAnodic Oxide Films and Nanostructures · Electrodeposition and Electroless Coatings · Corrosion Behavior and Inhibition