Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Na2P2O7 Electrolyte and Al Alloy Composition on Physical and Crystallographical Properties of PEO Coating Layer : II. Crystallographic Analysis of PEO Layer

플라즈마 전해 산화 코팅에 있어서 인산염 전해액과 모재 성분 변화가 Al 산화피막 물성에 미치는 영향 II. PEO 층의 결정상 분석

  • Received : 2012.04.23
  • Accepted : 2012.04.27
  • Published : 2012.05.31
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Abstract

Crystal structure and chemical compositions of Plasma electrolytic oxidized layer of A-1100, A-2024, A-5052, A-6061, A-6063, A-7075, ACD-7B and ACD-12 were investigated. The electrolyte for plasma electrolytic oxidation was mixture of distilled water, $Na_2P_2O_7$, Cu, Cr metal salts and KOH. ${\eta}$-Alumina, as well as ${\alpha}$-alumina, was main crystal phase. Another crystals such as $(Al_{0.948}Cr_{0.052})_2O_3$ and $(Al_{0.9}Cr_{0.1})_2O_3$ were also formed in the oxide layer. It was thought that the effect of electrolyte compositions on the physical properties and crystal system of PEO layers was greater than the effect of Al alloy composition variation.

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References

  1. A.L. Yerokhin, X. Nie, A. Leyland, A. Matthews, and S.J. Dowey, "Plasma Electrolysis for Surface Engineering," Surf. Coat. Technol., 122 73-93 (1999). https://doi.org/10.1016/S0257-8972(99)00441-7
  2. X. Nie, A. Leyland, H.W. Song, A.L. Yerokhin, S.J. Dowey, and A. Matthews, "Thickness Effects on the Mechanical Properties of Micro-arc Discharge Oxide Coatings on Aluminum Alloys," Surf. Coat. Technol., 116-119 1055-60 (1999). https://doi.org/10.1016/S0257-8972(99)00089-4
  3. X. Nie, E.I. Meltis, J.C. Jiang, A. Leyland, A.L. Yerokhin, and A. Matthews, "Abrasive Waer/corrosion Properties and TEM analysis of $Al_2O_3$ Coatings Fabricated using Plasma Electrolysis," Surf. Coat. Technol., 149 245-51 (2002). https://doi.org/10.1016/S0257-8972(01)01453-0
  4. A.L. Yerokin, A. Shatrov, V. Samsonov, P. Shahkov, A. Pilkington, A. Leyland, and A. Matthews, "Oxide Ceramic Coatings on Aluminium Alloys Produced by a Pulsed Bipolar Plasma Electrolytic Oxidation Process," Surf. Coat. Technol., 199 150-57 (2005). https://doi.org/10.1016/j.surfcoat.2004.10.147
  5. H. Kalkanci and S.C. Kurnaz, "The Effect of Process Parameters on Mullite-based Plasma Electrolytic Oxide Coatings," Surf. Coat. Technol., 203 15-22 (2008). https://doi.org/10.1016/j.surfcoat.2008.07.015
  6. F.-Y. Jin, K. Wang, M. Zhu, L.-R. Shen, J. Li, H.-H. Hong, and P. K. Chu, "Infrared Reflection by Alumina Films Produced on Aluminum Alloy by Plasma Electrolytic Oxidation," Mater. Chem. Phys., 114 398-401 (2009). https://doi.org/10.1016/j.matchemphys.2008.09.060
  7. Y.-J. Oh, J.-I. Mun, and J.-H. Kim, "Effect of Alloying Elements on Microstucture and Protective Proties of $Al_2O_3$ Coatings Formed on Aluminum Alloy Substrates by Plasma Electrolysis," Surf. Coat. Technol., 204 141-48 (2009). https://doi.org/10.1016/j.surfcoat.2009.07.002
  8. G. Lv, W. Gu, H.Chen, W. Feng, M. L. Khosa, L. Li, E. Niu, G. Zhang, and S.-Z. Yang, "Characteristic of Ceramic Coatings on Aluminum by Plasma Electrolytic Oxidation in Silicate and Phosphate Electrolyte," Appl. Surf. Sci., 253 2947-52 (2006). https://doi.org/10.1016/j.apsusc.2006.06.036
  9. W. Xue, Z. Deng, R. Chen, T. Zhang, and H. Ma, "Microstructure and Properties of Ceramic Coatings Produced on 2024 Aluminum Alloy by Microarc Oxidation," J. Mater. Sci., 36 2615-19 (2001). https://doi.org/10.1023/A:1017988024099
  10. J. Tian, Z. Luo, S. Qi, and X. Sun, "Structure and Antiwear Behavior of Micro-arc Oxidized Coatings on Alluminum Alloy," Surf. Coat. Technol., 154 1-7 (2002). https://doi.org/10.1016/S0257-8972(01)01671-1
  11. E. Arslan, Y. Totik, E.E. Demirci, Y. Vangolu, A. Alsaran, and I. Efeoglu, "High Temperature wear Behavior of Aluminum Oxide Layers by AC Micro Arc Oxidation," Surf. Coat. Technol., 204 829-33 (2009). https://doi.org/10.1016/j.surfcoat.2009.09.057
  12. G. Sundararajan and L. Rama Krishna, "Mechanisms Underlying the Formation of Thick Alumina Coatings Through the MAO Coating Technology," Surf. Coat. Technol., 167 269-77 (2003). https://doi.org/10.1016/S0257-8972(02)00918-0
  13. J.A. Curran and T.W. Clyne, "The Thermal Conductivity of Plasma Electrolytic Oxide Coatings on Aluminum and Magnesium," Surf. Coat. Technol., 197 177-83 (2005). https://doi.org/10.1016/j.surfcoat.2005.01.039
  14. J.A. Curran and T.W. Clyne, "Thermo-physical Properties of Plasma Electrolytic Oxide Coatings on Aluminum," Surf. Coat. Technol., 199 168-76 (2005). https://doi.org/10.1016/j.surfcoat.2004.09.037
  15. K. Wang, B.H. Koo, C.G. Lee, Y.J. Kim, S. Lee, and E. Byon, "Effects of Hybrid Voltages on Oxide Formation on 6061 Al-Alloys During Plasma Electrolytic Oxidation," Chin. J. Aeronautics, 22 564-68 (2009). https://doi.org/10.1016/S1000-9361(08)60142-9
  16. K. Wang, B.H. Koo, C.G. Lee, Y.J. Kim, S. Lee, and E. Byon, "Effects of Electrolytes Variation on Formation of Oxide Layers of 6061 Al alloys by Plasma Electrolytic Oxidation," Trans. Nonferrous Met. Soc. China, 19 866-70 (2009). https://doi.org/10.1016/S1003-6326(08)60366-0
  17. J.A. Curran, H. Kalkanci, Yu. Magurova, and T.W. Clyne, "Mullite-rich Plasma Electrolytic Oxide Coatings for Thermal Barrier Applications," Surf. Coat. Technol., 201 8683-87 (2007). https://doi.org/10.1016/j.surfcoat.2006.06.050
  18. W. Gu, G. Lv, H. Chen, G.-L. Chen, W.-R. Feng, and S.-Z. Yang, "Characterization of Ceramic Coatings Produced by Plasma Electrolytic Oxidation of Aluminum Alloy," Mater. Sci. Eng. A, 447 158-62 (2007). https://doi.org/10.1016/j.msea.2006.09.004
  19. B.-Y. Kim, D. Y. Lee, Y.-N. Kim, M.-S. Jeon, W.-S. You, and K.-Y. Kim, "Effect of Al alloy Composition on Physical and Crystallographical Properties of Plasma Electrolytic Oxidized Coatings. I. Physical Properties of PEO layer," J. Kor. Ceram. Soc., 47 [4] 256-61 (2010). https://doi.org/10.4191/KCERS.2010.47.3.256
  20. B.-Y. Kim, D. Y. Lee, M. C. Shin, H.-G. Shin, B.-K. Kim, S. Y. Kim, and K. Y. Kim, "Effect of Al Alloy Composition on Physical and Crystallographical Properties of Plasma Electrolytic Oxidized Coatings II. Crystallographic Analysis of PEO layer," J. Kor. Ceram. Soc., 47 [4] 283-89 (2010). https://doi.org/10.4191/KCERS.2010.47.4.283
  21. R.J. Damani and P. Makroczy, "Heat Treatment Induced Phase and Microstructural Development in Bulk Plasma Sprayed Alumina," J. Eur. Ceram. Soc., 20 867-88 (2000). https://doi.org/10.1016/S0955-2219(99)00217-4
  22. I. Levin and D.G. Brandon, "Metastable Alumina Polymorph : Crystal Structures and Transition Sequences," J. Am. Ceram. Soc., 81 1995-2012 (1998).
  23. I. Levin, L.A. Bendersky, D.G. Brandon, and M. Rhle, "Cubic to Monoclinic Phase Transformations in Alumina," Acta. Mater., 45 [9] 3659-69 (1997). https://doi.org/10.1016/S1359-6454(97)00040-2
  24. C. Ruberto, "Metastable Alumina from Theory: Bulk, Surface, and Growth of ${\kappa}-Al_2O_3$," Thesis of Ph. D., Gteborg Univ., Sweden, 2001.
  25. H.M. Nykyforchyn, M.D. Klapkiv, and V.M. Posuvailo, "Properties of Synthesised Oxide-ceramic Coatings in Electrolyte Plasma on Aluminum Alloys," Surf. Coat. Technol., 100-101 219-221 (1998). https://doi.org/10.1016/S0257-8972(97)00617-8