Insights into structure and high-temperature oxidation behavior of plasma electrolytic oxidation ceramic coatings formed in NaAlO2–Na2CrO4 electrolyte

  • Zhao-Ying Ding
  • Yuan-Hong Wang
  • Jia-Hu Ouyang
  • Zhan-Guo Liu
  • Ya-Ming Wang
  • Yu-Jin Wang
Ceramics
  • 4 Downloads

Abstract

Plasma electrolytic oxidation (PEO) ceramic coatings were formed on Ti2AlNb alloy in various NaAlO2 electrolytes containing 2 g L−1, 4 g L−1, and 6 g −1 Na2CrO4 additive, respectively. The influence of Na2CrO4 additive in NaAlO2 electrolyte on structure and high-temperature oxidation behavior at 800 °C was investigated. The Na2CrO4 additive in the NaAlO2 electrolyte not only promotes the formation of γ-Al2O3 phase and densification of ceramic coatings, but also participates directly in the growth of ceramic coating to form new Cr3O and (Al0.948Cr0.052)2O3 phases. The PEO ceramic coatings formed in NaAlO2 electrolytes with 2 g L−1 and 4 g L−1 Na2CrO4 additive show better oxidation resistance than those PEO coatings formed in a NaAlO2 basic electrolyte based on isothermal oxidation tests at 800 °C up to 150 h. A thin and uniform isothermally oxidized layer is formed in the interlayer adjacent the substrate, which protects the substrate from the inward diffusion of oxygen and the outward diffusion of metallic elements. The PEO ceramic coatings formed in NaAlO2 electrolyte with 4 g L−1 Na2CrO4 additive exhibit the least mass gain among all the specimens, which is only a half of the ceramic coating formed in a NaAlO2 basic electrolyte without any Na2CrO4 additive.

Notes

Acknowledgements

The authors would like to thank the financial support from the National Natural Science Foundation of China (NSFC, Nos. 51572061, 51621091, 60776803, and 50572020).

Compliance with ethical standards

Conflict of interest

The authors declared that they have no conflict of interests to this work.

References

  1. 1.
    Kumpfert J (2001) Intermetallic alloys based on orthorhombic titanium aluminide. Adv Eng Mater 3(11):851–864CrossRefGoogle Scholar
  2. 2.
    Cowen CJ, Boehlert CJ (2006) Microstructure, creep, and tensile behaviour of a Ti–15Al–33Nb (at.%) beta + orthorhombic alloy. Philos Mag 86(1):99–124CrossRefGoogle Scholar
  3. 3.
    Kong L, Lu B, Cui X, Du H, Li T, Xiong T (2010) Oxidation behavior of TiAl/Al composite coating on orthorhombic-TiAlNb based alloy at different temperatures. J Therm Spray Technol 19(3):650–656CrossRefGoogle Scholar
  4. 4.
    Zhang XJ, Zhao SY, Gao CX, Wang SJ (2009) Amorphous sol–gel SiO2 film for protection of an orthorhombic phase alloy against high temperature oxidation. J Sol Gel Sci Technol 49(2):221–227CrossRefGoogle Scholar
  5. 5.
    Wang QM, Zhang K, Gong J, Cui YY, Sun C, Wen LS (2007) NiCoCrAlY coatings with and without an Al2O3/Al interlayer on an orthorhombic TiAlNb-based alloy: oxidation and interdiffusion behaviors. Acta Mater 55(4):1427–1439CrossRefGoogle Scholar
  6. 6.
    Wu H, Zhang P, Zhao H, Wang L, Xie A (2011) Effect of different alloyed layers on the high temperature oxidation behavior of newly developed Ti2AlNb-based alloys. Appl Surf Sci 257(6):1835–1839CrossRefGoogle Scholar
  7. 7.
    Li HQ, Wang QM, Jiang SM, Ma J, Gong J, Sun C (2011) Oxidation and interfacial fracture behaviour of NiCrAlY/Al2O3 coatings on an orthorhombic-Ti2AlNb alloy. Corros Sci 53(3):1097–1106CrossRefGoogle Scholar
  8. 8.
    Tang H, Sun Q, Yi CG, Jiang ZH, Wang FP (2012) High emissivity coatings on titanium alloy prepared by micro-arc oxidation for high temperature application. J Mater Sci 47(5):2162–2168.  https://doi.org/10.1007/s10853-011-6017-3 CrossRefGoogle Scholar
  9. 9.
    Wang ZW, Wang YM, Liu Y, Xu JL, Guo LX, Zhou Y, Ouyang JH, Dai JM (2011) Microstructure and infrared emissivity property of coating containing TiO2 formed on titanium alloy by microarc oxidation. Curr Appl Phys 11(6):1405–1409CrossRefGoogle Scholar
  10. 10.
    Rakoch AG, Bardin IV (2010) Microarc oxidation of light alloys. Metallurgist 54(5–6):378–383CrossRefGoogle Scholar
  11. 11.
    Wang YM, Guo LX, Ouyang JH, Zhou Y, Jia DC (2009) Interface adhesion properties of functional coatings on titanium alloy formed by microarc oxidation method. Appl Surf Sci 255(15):6875–6880CrossRefGoogle Scholar
  12. 12.
    Zhang X, Wang H, Li J, He X, Hang R, Huang X, Tian L, Tang B (2016) Corrosion behavior of Zn-incorporated antibacterial TiO2 porous coating on titanium. Ceram Int 42(15):17095–17100CrossRefGoogle Scholar
  13. 13.
    Bayati MR, Moshfegh AZ, Golestani-Fard F (2010) Effect of electrical parameters on morphology, chemical composition, and photoactivity of the nano-porous titania layers synthesized by pulse-microarc oxidation. Electrochim Acta 55(8):2760–2766CrossRefGoogle Scholar
  14. 14.
    Zhang XP, Zhao ZP, Wu FM, Wang YL, Wu J (2007) Corrosion and wear resistance of AZ91D magnesium alloy with and without microarc oxidation coating in Hank’s solution. J Mater Sci 42(20):8523–8528.  https://doi.org/10.1007/s10853-007-1738-z CrossRefGoogle Scholar
  15. 15.
    Malyshev VN, Zorin KM (2007) Features of microarc oxidation coatings formation technology in slurry electrolytes. Appl Surf Sci 254(5):1511–1516CrossRefGoogle Scholar
  16. 16.
    Wang YH, Liu ZG, Ouyang JH, Wang YM, Zhou Y (2015) Influence of electrolyte compositions on structure and high-temperature oxidation resistance of microarc oxidation coatings formed on Ti2AlNb alloy. J Alloy Compd 647:431–437CrossRefGoogle Scholar
  17. 17.
    Lin X, Wang X, Tan L, Wan P, Yu X, Li Q, Yang K (2014) Effect of preparation parameters on the properties of hydroxyapatite containing micro-arc oxidation coating on biodegradable ZK60 magnesium alloy. Ceram Int 40(7):10043–10051CrossRefGoogle Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Advanced Structural–Functional Integration Materials & Green Manufacturing TechnologyHarbin Institute of TechnologyHarbinChina
  2. 2.School of Materials Science and EngineeringHarbin Institute of TechnologyHarbinChina

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