Mechanical properties of Al2O3/Al bi-layer coated AZ91 magnesium alloy

被引：28

作者：

Xin, Yunchang ^{[1
,2
]}

Huo, Kaifu ^{[1
,3
,4
]}

Hu, Tao ^{[2
]}

Tang, Guoyi ^{[1
]}

Chu, Paul K. ^{[2
]}

机构：

[1] Tsinghua Univ, Adv Mat Inst, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

[3] Wuhan Univ Sci & Engn, Hubei Prov Key Lab Refractories, Wuhan 430081, Peoples R China

[4] Wuhan Univ Sci & Engn, Ceram Minist Prov, Jointly Constructed Cultivat Base State Key Lab, Coll Mat & Met, Wuhan 430081, Peoples R China

来源：

THIN SOLID FILMS | 2009年 / 517卷 / 17期

关键词：

Magnesium alloy; Al2O3/Al bi-layered coating; Mechanical properties; Hardness; Bonding strength; SULFATE-SOLUTIONS; TEMPERATURE; CORROSION;

D O I：

10.1016/j.tsf.2009.03.101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An Al2O3/Al bi-layered coating has been successfully deposited on AZ91 magnesium alloy using a filtered cathodic arc deposition system and favorable corrosion resistance has been demonstrated by our previous experiments. In this work, the mechanical properties of an Al2O3/Al bi-layered coating are studied by nanoindentation and nanoscratch. X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and scanning electron microscopy (SEM) are employed to characterize the structure of the coating. The surface hardness and elastic modulus of coated alloy are found to be enhanced dramatically. The coating also exhibits excellent bonding strength. In addition, the failure process of the coating during scratch is discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：5357 / 5360

页数：4

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