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The effects of current density on the phase composition and microstructure properties of micro-arc oxidation coating

Guangliang, Yang ; Xianyi, Lü ; Yizhen, Bai ; Haifeng, Cui ; Zengsun, Jin

Journal of alloys and compounds, 2002-10, Vol.345 (1), p.196-200 [Periódico revisado por pares]

Lausanne: Elsevier B.V

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Título:
The effects of current density on the phase composition and microstructure properties of micro-arc oxidation coating
Autor: Guangliang, Yang ; Xianyi, Lü ; Yizhen, Bai ; Haifeng, Cui ; Zengsun, Jin
Assuntos: Chemical synthesis ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Electrical properties of specific thin films ; Electron, ion, and scanning probe microscopy ; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures ; Exact sciences and technology ; Materials science ; Metal and metallic alloys ; Metals and metallic alloys ; Oxidation ; Physics ; Scanning electron microscopy ; Structure of solids and liquids; crystallography ; Surface treatments ; Thin films ; Transmission, reflection and scanning electron microscopy(including ebic) ; X-ray diffraction
É parte de: Journal of alloys and compounds, 2002-10, Vol.345 (1), p.196-200
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Ceramic coatings have been synthesized on the Al alloy substrate by micro-arc oxidation (MAO) technique. The effects of current density on the mechanical and chemical properties of MAO coatings have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), and micro-hardness test. The samples fabricated at high current density consist mainly of α-Al 2O 3, while the samples fabricated at low current density are almost composed of γ-Al 2O 3. XRD analysis at different depths from coating surface towards substrate indicates that there is a complicated variation of α-Al 2O 3 content as a function of depth, which is different from the results of others. Micro-hardness test shows that these kinds of samples have high hardness. However, in the plane parallel to the substrate, there is a non-uniform distribution of hardness for the samples deposited at high current density, which can be attributed to the non-uniform distribution of pores in the same plane parallel to the substrate.
Editor: Lausanne: Elsevier B.V
Idioma: Inglês

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The effects of current density on the phase composition and microstructure properties of micro-arc oxidation coating

Guangliang, Yang ; Xianyi, Lü ; Yizhen, Bai ; Haifeng, Cui ; Zengsun, Jin

Lausanne: Elsevier B.V

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