DOI QR코드

DOI QR Code

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

플라즈마 전해산화공정을 이용한 Mg95Zn4.3Y0.7 합금분말 성형체의 표면특성제어

  • 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)
  • Published : 2008.04.28

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

References

  1. H. Guo, M. An, S. Xu and H. Huo: Mater. Letters, 60 (2006) 1538 https://doi.org/10.1016/j.matlet.2005.11.066
  2. T. Wei, F. Yan and J. Tian: J. Alloys Comp., 389 (2005) 169 https://doi.org/10.1016/j.jallcom.2004.05.084
  3. A. L. Yerokhin, A. Shatrov, V. Samsonov, P. Shashkov, A. Leyland and A. Matthews: Surf. Coat. Tech., 182 (2004) 78 https://doi.org/10.1016/S0257-8972(03)00877-6
  4. H. K. Lim, J. Y. Lee, D. H. Kim and W. T. Kim: J. Korea Foundrymen's Soc., 26 (2006) 34 (Korean)
  5. J. S. Park, H. C. Jung and K. S. Shin: Corros. Sci. and Tech., 5 (2006) 77
  6. M. Nishida, Y. Kawamura and T. Yamamoto: Mater. Sci. Eng. A, 375 (2004) 1217 https://doi.org/10.1016/j.msea.2003.10.145
  7. J. K. Lee, T. S. Kim, H. G. Jeong and J. C. Bae: Mater. Sci. Forum, 534 (2007) 833 https://doi.org/10.4028/www.scientific.net/MSF.534-536.833
  8. H. J. Chae, J. K. Lee, J. C. Bae and T. S. Kim: J. Korean Powder Metall. Inst., 13 (2006) 427 (Korean) https://doi.org/10.4150/KPMI.2006.13.6.427