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http://dx.doi.org/10.4150/KPMI.2008.15.2.095

Surface Treatment of Mg95Zn4.3Y0.7 Alloy Powder Consolidates using Plasma Electrolytic Oxidation  

Kim, J.H. (Advanced materials division, Korea Institute of Industrial Technology)
Choi, H.S. (Advanced materials division, Korea Institute of Industrial Technology)
Kim, D.H. (Department of Metallurgical Engineering, Yonsei University)
Hwang, D.Y. (Department of Materials Science and Engineering, Hanyang University)
Kim, H.S. (Department of Nano Materials Engineering, Chungnam National University)
Kim, T.S. (Advanced materials division, Korea Institute of Industrial Technology)
Publication Information
Journal of Powder Materials / v.15, no.2, 2008 , pp. 95-100 More about this Journal
Abstract
The investigation is to modify the mechanical and chemical properties of Mg alloys using a combination of rapid solidification and surface treatment. As the first approach, $Mg_{95}Zn_{4.3}Y_{0.7}$ was gas atomized and pressure sintered by spark plasma sintering process (SPS), showing much finer microstructure and higher strength than the alloys as cast. Further modification was performed by treating the surface of PM Mg specimen using Plasma electrolytic oxidation (PEO) process. During the PEO processing, MgO layer was initiated to form on the surface of Mg powder compacts, and the thickness and the density of MgO layer were varied with the reaction time. The thickening rate became low with the reaction time due to the limited diffusion rate of Mg ions. The surface morphology, corrosion behavior and wear resistance were also discussed.
Keywords
$Mg_{95}Zn_{4.3}Y_{0.7}$ alloy powder; Spark plasma sintering (SPS); Plasma electrolytic oxidation (PEO); Wear resistance; Corrosion resistance;
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Times Cited By KSCI : 1  (Citation Analysis)
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