Growth regularity of ceramic coatings formed by microarc oxidation on Al-Cu-Mg alloy

Citation
Wb. Xue et al., Growth regularity of ceramic coatings formed by microarc oxidation on Al-Cu-Mg alloy, THIN SOL FI, 372(1-2), 2000, pp. 114-117
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
THIN SOLID FILMS
ISSN journal
0040-6090 → ACNP
Volume
372
Issue
1-2
Year of publication
2000
Pages
114 - 117
Database
ISI
SICI code
0040-6090(20000822)372:1-2<114:GROCCF>2.0.ZU;2-T
Abstract
Growth regularity of ceramic coatings formed on Al-Cu-Mg alloy by microarc oxidation was investigated, and the formation mechanism of coatings was dis cussed. After oxidation of several hours with linear growth, the growth rat e of coatings decreases gradually. During the early stage, the sample geome trical dimension increases with oxidation. However, when the ceramic oxide coating reaches a certain thickness, the sample geometrical dimension will no longer increase although the total coating thickness keeps increasing. T he oxide coatings contain a loose layer and a compact layer. The loose laye r is formed first. After several hours, the compact layer begins to grow to wards the Al substrate while the thickness of the loose layer changes littl e. The thickness of the compact layer can finally reach over 75% of the tot al coating thickness. After the surface loose layer is ground off, the samp le dimension is approximately the same size as the sample before the treatm ent. (C) 2000 Elsevier Science S.A. All rights reserved.