Oxidation behaviour of cast aluminium matrix composites with Ce surface coatings

被引：9

作者：

Pardo, A. ^{[1
]}

Merino, M. C.

Arrabal, R.

Feliu, S., Jr.

Viejo, F.

机构：

[1] Univ Complutense, Fac Ciencias Quim, Dept Ciencia Mat, Madrid 28040, Spain

[2] CSIC, Ctr Nacl Invest Met, Madrid 28040, Spain

来源：

CORROSION SCIENCE | 2007年 / 49卷 / 07期

关键词：

oxidation; metal matrix composites; oxide coatings;

D O I：

10.1016/j.corsci.2007.01.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behaviour of SiC-reinforced aluminium matrix composites (A3xx.x/SiCp) has been studied after Ce-based treatments. Kinetics data of oxidation process were obtained from gravimetric tests performed at different temperatures (350, 425 and 500 degrees C). The nature of the oxidation layer was analyzed by scanning electron and atomic force microscopy, energy dispersive X-ray analysis, X-ray photoelectron spectroscopy and X-ray diffraction. The extent of oxidation degradation in untreated composites was preferentially localized in matrix/SiCp interfaces favouring the MgO formation. Cc coatings favoured a uniform oxidation of the composite surface with MgAl2O4 spinel formation. This oxide increased the surface hardness of the materials. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3118 / 3133

页数：16

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