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- 플라즈마 전해산화공정을 이용한 Mg95Zn4.3Y0.7 합금분말 성형체의 표면특성제어
- 김재호, 최한신, 김도향, 황덕영, 김형섭, 김택수
- Surface Treatment of Mg95Zn4.3Y0.7 Alloy Powder Consolidates using Plasma Electrolytic Oxidation
- J.H. Kim, H.S. Choi, D.H. Kim, D.Y. Hwang, H.S. Kim, T.S. Kim
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Journal of Korean Powder Metallurgy Institute 2008;15(2):95-100
DOI: https://doi.org/10.4150/KPMI.2008.15.2.095
2한국생산기술연구원
3연세대학교
4한양대학교
5충남대학교
6한국생산기술연구원
1Advanced materials division, Korea Institute of Industrial Technology
2Advanced materials division, Korea Institute of Industrial Technology
3Department of Metallurgical Engineering, Yonsei University
4Department of Materials Science and Engineering, Hanyang University
5Department of Nano Materials Engineering, Chungnam National University
6Advanced materials division, Korea Institute of Industrial Technology
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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_95Zn_4.3Y_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.
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