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

Yunchang Xin; Kaifu Huo; Tao Hu; Guoyi Tang; Paul K. Chu

doi:10.1016/j.tsf.2009.03.101

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

Yunchang Xin, Kaifu Huo, Tao Hu, Guoyi Tang, Paul K. Chu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

31 Citations (Scopus)

Abstract

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. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	5357-5360
Journal	Thin Solid Films
Volume	517
Issue number	17
DOIs	https://doi.org/10.1016/j.tsf.2009.03.101
Publication status	Published - 1 Jul 2009

Research Keywords

Al2O3/Al bi-layered coating
Bonding strength
Hardness
Magnesium alloy
Mechanical properties

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10.1016/j.tsf.2009.03.101

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title = "Mechanical properties of Al2O3/Al bi-layer coated AZ91 magnesium alloy",

abstract = "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. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

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T1 - Mechanical properties of Al2O3/Al bi-layer coated AZ91 magnesium alloy

AU - Xin, Yunchang

AU - Huo, Kaifu

AU - Hu, Tao

AU - Tang, Guoyi

AU - Chu, Paul K.

PY - 2009/7/1

Y1 - 2009/7/1

N2 - 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. © 2009 Elsevier B.V. All rights reserved.

AB - 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. © 2009 Elsevier B.V. All rights reserved.

KW - Al2O3/Al bi-layered coating

KW - Bonding strength

KW - Hardness

KW - Magnesium alloy

KW - Mechanical properties

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DO - 10.1016/j.tsf.2009.03.101

M3 - RGC 21 - Publication in refereed journal

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EP - 5360

JO - Thin Solid Films

JF - Thin Solid Films

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