Metals and materials international

The Korean Institute of Metals and Materials (대한금속재료학회)
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Characteristics of Plasma Electrolytic Oxide Coatings on Mg-Al-Zn Alloy Prepared by Powder Metallurgy

Chang, Si-Young;Lee, Du-Hyung;Kim, Bo-Sik;Kim, Taek-Soo;Song, Yo-Seung;Kim, Sung-Ho;Lee, Chan-Bok

  • Published : 20091000
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Abstract

Mg-6 wt.%Al-1 wt.%Zn alloy powders were produced by gas atomization, and subsequently compacted and sintered under various conditions of temperature, time, and pressure. The bulk Mg-6 wt.%Al-1 wt.%Zn alloy was coated by the plasma electrolytic oxidation (PEO) method. The optimum condition of compaction and sintering for PEO coatings was established based on the investigation of microstructure, microhardness, and corrosion properties of coatings which were compared to those of cast Mg-6 wt.%Al alloy. The coatings on Mg-6 wt.%Al and Mg-6 wt.%Al-1 wt.%Zn alloys consisted of MgO, $MgAl_{2}O_{4}$, and $Mg_{2}SiO_{4}$. The Mg-6 wt.%Al-1 wt.%Zn alloy compacted at room temperature for 10 min and sintered at 893 K for 3 h showed the most porous and nonuniform coating layer because the coatings had grown through grain boundaries that resulted from poor bonding between powder particles in the substrate. However, the coated Mg-6 wt.%Al-1 wt.%Zn alloy hot-compacted at 593 K for 10 min had the thickest coating layer and the highest microhardness. In addition, it demonstrated the best corrosion resistance as verified by polarization curves in 3.5% NaCl solution.

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References

  1. Y. Kojima and S. Kamado, Mater. Sci. Forum 488, 9 (2005) https://doi.org/10.4028/www.scientific.net/MSF.488-489.9
  2. B. H. Choi, B. S. You, and I. M. Park, Met. Mater. Int. 12, 63 (2006) https://doi.org/10.1007/BF03027525
  3. N. J. Park, J. H. Hwang, and J. S. Roh, J. Kor. Inst. Met. & Mater. 47, 1 (2009)
  4. B. S. Shin, Y. Kim, and D. H. Bae, J. Kor. Inst. Met. & Mater. 46, 1 (2008)
  5. M. Sugamata, S. Hanawa, and J. Kaneko, Mater. Sci. Eng. A 226-228, 861 (1997) https://doi.org/10.1016/S0921-5093(97)80089-5
  6. A. L. Yerokhin, X. Nie, A. Leyland, A. Matthews, and S. J. Dowey, Surf. Coat. Tech. 122, 73 (1999) https://doi.org/10.1016/S0257-8972(99)00441-7
  7. Y. Kawamura, K. Hayashi, A. Inoue, and T. Matsumoto, Mater. Trans. 42, 1172 (2001) https://doi.org/10.2320/matertrans.42.1172
  8. D. J. Sakkinen, SAE Technical Paper Series, 940779
  9. Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p. 144, Kallos Publishing Co., Tokyo (2000)
  10. J. Liang, B. Guo, J. Tian, H. Liu, J. Zhou, and T. Xu, Appl. Surf. Sci. 252, 345 (2005) https://doi.org/10.1016/j.apsusc.2005.01.007
  11. J. A. Curran and T. W. Clyne, Surf. Coat. Tech. 199, 177 (2005) https://doi.org/10.1016/j.surfcoat.2004.11.045
  12. B. H. Song, Y. L. Kim, and S. Y. Chang, Sol. St. Phen. 124- 126, 763 (2007) https://doi.org/10.4028/www.scientific.net/SSP.124-126.763
  13. S. Y. Chang, Y. L. Kim, B. H. Song, and J. H. Lee, Mater. Sci. Forum 539-543, 1224 (2007) https://doi.org/10.4028/www.scientific.net/MSF.539-543.1224
  14. H. Guo, M. An, S. Xu, and H. Huo, Mater. Lett. 60, 1538 (2006) https://doi.org/10.1016/j.matlet.2005.11.066
  15. Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p. 343-345, Kallos Publishing Co., Tokyo (2000)

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