Comparative study of mechanical and tribological properties of alumina coatings formed on aluminium in various conditions

被引：39

作者：

Bensalah, W. ^{[1
]}

Elleuch, K. ^{[2
]}

Feki, M. ^{[1
]}

DePetris-Wery, M. ^{[3
]}

Ayedi, H. F. ^{[1
]}

机构：

[1] ENIS, URCIM, Dept Genie Mat, Sfax, Tunisia

[2] ENIS, LASEM, Sfax, Tunisia

[3] Univ Paris 11, IUT Mesures Phys Orsay, F-91400 Orsay, France

来源：

MATERIALS & DESIGN | 2009年 / 30卷 / 09期

关键词：

Alumina coating; Vickers microhardness; Abrasion; Failure; ANODIC OXIDE; ACID BATH; OPTIMIZATION; OXIDATION; MIGRATION; FILMS; IONS;

D O I：

10.1016/j.matdes.2009.02.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Influence of oxalic acid addition to sulphuric acid bath on the mechanical properties of the oxide layers formed on aluminium has been examined. For this purpose two Doehlert experimental designs with three variables (temperature, current density, sulphuric acid concentration) and four variables (oxalic acid concentration, temperature, current density, sulphuric acid concentration) were realized. Four responses were studied namely: growth rate (V-e), Vickers microhardness (D), weight loss after abrasion (W-a) and deflection at failure (D-f) of the anodic oxide layer. A comparative study based on surface responses was achieved. Compared with sulphuric acid bath, it was found that the addition of oxalic acid permits high growth rates, high abrasion resistance and high microhardness but less ductile layers. The observed mechanical properties of the oxide layers can be related to their morphology revealed by SEM observations and their chemical composition determined by GDOES. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3731 / 3737

页数：7

共 27 条

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