Abstract
Micro arc oxidation coatings were produced on AA7075 (UNS A97075) substrates using various process parameters. The study aimed to improve the surface characteristics of the alloy. Thickness, hardness, and roughness measurements characterized the coatings. It was revealed that the coating thickness was directly related to the coating roughness. Various aluminum oxide (Al2O3) phases were detected in the coatings, and phase density differences were determined. Variations in the hardness of the coatings depended on the phase distribution, porosity, and presence of microcracks. Scanning electron microscopy investigations of the coating/substrate interface proved a simple and quick analysis of porosity.
Keywords
Property (philosophy)
Materials science
Coating
Micro arc oxidation
Arc (geometry)
Metallurgy
Composite material
Mechanical engineering
Engineering
Microstructure
Philosophy
Subject Areas
Metal and Thin Film Mechanics
·Mechanics of Materials ·Physical Sciences
High-Temperature Coating Behaviors
·Aerospace Engineering ·Physical Sciences
Corrosion Behavior and Inhibition
·Materials Chemistry ·Physical Sciences
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