Analysis of Phase Distribution for Ceramic Coatings Formed by Microarc Oxidation on Aluminum Alloy

The phase distribution for ceramic coatings formed by microarc oxidation (MAO) on 2024 aluminum alloy was investigated using X‐ray diffraction. The results showed that the ceramic coatings mainly consisted of α‐Al2O3 and γ‐Al2O3 phases. The percentage of α‐Al2O3 gradually increased from the external...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Ceramic Society 1998-05, Vol.81 (5), p.1365-1368
Main Authors: Xue, Wenbin, Deng, Zhiwei, Lai, Yonchun, Chen, Ruyi
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metals. Metallurgy
Nonmetallic coatings
Production techniques
Surface treatment
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The phase distribution for ceramic coatings formed by microarc oxidation (MAO) on 2024 aluminum alloy was investigated using X‐ray diffraction. The results showed that the ceramic coatings mainly consisted of α‐Al2O3 and γ‐Al2O3 phases. The percentage of α‐Al2O3 gradually increased from the external surface to the interface between the coating and the substrate of samples. The surface layer of coatings mainly contained the γ‐Al2O3 phase, and its fraction of the composition remained almost constant with oxidation time. It is believed that the difference in the amounts of α‐Al2O3 and γ‐Al2O3 phases in the different layers of coatings was caused by the various cooling rates of molten Al2O3, which temporarily existed in the microarc zone.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1998.tb02493.x