Oxide Based Ceramic Coating on Al-4Cu Alloy by Microarc Oxidation

• Authors: S. Cengiz , M. Tarakci , Y. Gencer , A. Devecili , Y. Azakli
• Languages of publication: EN

Abstracts

EN

In this study the Al-Cu aluminum alloy with 4 wt% Cu was prepared under controlled atmosphere and coated by microarc oxidation technique for the durations of 40, 80, and 120 min. The phase composition, surface roughness and hardness of the coating were characterized by X-ray diffraction, scanning electron microscopy, profilometry. The outer region contains larger sized porosities while fine porosities were formed in the inner dense region of the coating. The longer coating duration resulted in dense inner region with finely distributed α-Al_2O_3 precipitates. The presence of Cu in the outer region is not significant while the presence of Si in inner region was lower than in the outer region. Mullite and γ-Al_2O_3 phases were formed for 40 min and α-Al_2O_3 phase was additionally formed for 80 min and 120 min coating time. The coating thickness increased from 38 μm (40 min) to 115 μm (120 min) while the surface roughness (R_{a}) increased from 5 μm (40 min) to 9 μm (120 min).

Keywords

EN

81.15.-z; 81.05.Bx

Discipline

• 81.05.Bx: Metals, semimetals, and alloys
• 81.15.-z: Methods of deposition of films and coatings; film growth and epitaxy(for structure of thin films, see 68.55.-a; see also 85.40.Sz Deposition technology in microelectronics; for epitaxial dielectric films, see 77.55.Px)

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 445-448

Dates

published

2013-02

Contributors

author

S. Cengiz

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

M. Tarakci

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

Y. Gencer

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

A. Devecili

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

Y. Azakli

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

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Identifiers

DOI

10.12693/APhysPolA.123.445