Improving the wear properties of AZ31 magnesium alloy under vacuum low-temperature condition by plasma electrolytic oxidation coating

Hang Li; Songtao Lu; Wei Qin; Lu Han; Xiaohong Wu

doi:10.1016/j.actaastro.2015.07.005

Improving the wear properties of AZ31 magnesium alloy under vacuum low-temperature condition by plasma electrolytic oxidation coating

Hang Li
, Songtao Lu
, Wei Qin
, Lu Han
, Xiaohong Wu^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Abstract In this paper, Al-doped ceramic coatings with a thickness of 22-27 μm were prepared on AZ31 magnesium alloy by plasma electrolytic oxidation (PEO) in electrolytes that contain varied concentrations of NaAlO₂, aiming to improve its wear resistance under vacuum low-temperature (-50°C) condition. These obtained ceramic coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the ceramic coatings with typical porous structure were mainly consisted of MgO and MgAl₂O₄ phases, indicating that the Al elements were participated into the coating during the PEO process. We found that at the concentrations 5 g/L NaAlO₂, the coating has its highest surface hardness (6.2 GPa) and lowest friction coefficients (0.21) under vacuum low-temperature condition. Our results demonstrate that such PEO coatings are very promising to improve the wear properties under vacuum low-temperature condition.

Original language	English
Article number	5497
Pages (from-to)	126-131
Number of pages	6
Journal	Acta Astronautica
Volume	116
DOIs	https://doi.org/10.1016/j.actaastro.2015.07.005
State	Published - 22 Jul 2015

Keywords

Al doping
Magnesium alloy
Plasma electrolytic oxidation
Vacuum low-temperature
Wear properties

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10.1016/j.actaastro.2015.07.005

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@article{3d543980d1a647438aa2b964aba8f2db,

title = "Improving the wear properties of AZ31 magnesium alloy under vacuum low-temperature condition by plasma electrolytic oxidation coating",

abstract = "Abstract In this paper, Al-doped ceramic coatings with a thickness of 22-27 μm were prepared on AZ31 magnesium alloy by plasma electrolytic oxidation (PEO) in electrolytes that contain varied concentrations of NaAlO2, aiming to improve its wear resistance under vacuum low-temperature (-50°C) condition. These obtained ceramic coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the ceramic coatings with typical porous structure were mainly consisted of MgO and MgAl2O4 phases, indicating that the Al elements were participated into the coating during the PEO process. We found that at the concentrations 5 g/L NaAlO2, the coating has its highest surface hardness (6.2 GPa) and lowest friction coefficients (0.21) under vacuum low-temperature condition. Our results demonstrate that such PEO coatings are very promising to improve the wear properties under vacuum low-temperature condition.",

keywords = "Al doping, Magnesium alloy, Plasma electrolytic oxidation, Vacuum low-temperature, Wear properties",

author = "Hang Li and Songtao Lu and Wei Qin and Lu Han and Xiaohong Wu",

note = "Publisher Copyright: {\textcopyright} 2015 Published by Elsevier Ltd.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.actaastro.2015.07.005",

language = "英语",

volume = "116",

pages = "126--131",

journal = "Acta Astronautica",

issn = "0094-5765",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Improving the wear properties of AZ31 magnesium alloy under vacuum low-temperature condition by plasma electrolytic oxidation coating

AU - Li, Hang

AU - Lu, Songtao

AU - Qin, Wei

AU - Han, Lu

AU - Wu, Xiaohong

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract In this paper, Al-doped ceramic coatings with a thickness of 22-27 μm were prepared on AZ31 magnesium alloy by plasma electrolytic oxidation (PEO) in electrolytes that contain varied concentrations of NaAlO2, aiming to improve its wear resistance under vacuum low-temperature (-50°C) condition. These obtained ceramic coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the ceramic coatings with typical porous structure were mainly consisted of MgO and MgAl2O4 phases, indicating that the Al elements were participated into the coating during the PEO process. We found that at the concentrations 5 g/L NaAlO2, the coating has its highest surface hardness (6.2 GPa) and lowest friction coefficients (0.21) under vacuum low-temperature condition. Our results demonstrate that such PEO coatings are very promising to improve the wear properties under vacuum low-temperature condition.

AB - Abstract In this paper, Al-doped ceramic coatings with a thickness of 22-27 μm were prepared on AZ31 magnesium alloy by plasma electrolytic oxidation (PEO) in electrolytes that contain varied concentrations of NaAlO2, aiming to improve its wear resistance under vacuum low-temperature (-50°C) condition. These obtained ceramic coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the ceramic coatings with typical porous structure were mainly consisted of MgO and MgAl2O4 phases, indicating that the Al elements were participated into the coating during the PEO process. We found that at the concentrations 5 g/L NaAlO2, the coating has its highest surface hardness (6.2 GPa) and lowest friction coefficients (0.21) under vacuum low-temperature condition. Our results demonstrate that such PEO coatings are very promising to improve the wear properties under vacuum low-temperature condition.

KW - Al doping

KW - Magnesium alloy

KW - Plasma electrolytic oxidation

KW - Vacuum low-temperature

KW - Wear properties

UR - https://www.scopus.com/pages/publications/84937401103

U2 - 10.1016/j.actaastro.2015.07.005

DO - 10.1016/j.actaastro.2015.07.005

M3 - 文章

AN - SCOPUS:84937401103

SN - 0094-5765

VL - 116

SP - 126

EP - 131

JO - Acta Astronautica

JF - Acta Astronautica

M1 - 5497

ER -

Improving the wear properties of AZ31 magnesium alloy under vacuum low-temperature condition by plasma electrolytic oxidation coating

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Keywords

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